Monday, February 28, 2011

Unraveling the mysteries of social media for dentists

I participated in a lecture at the recent Chicago Dental Society's Midwinter Meeting on Social Networking In Dentistry. You can read about the lecture on Dr. Bicuspid by clicking here.

Saturday, February 26, 2011

Degradation of polymeric restorative materials subjected to a high caries challenge

Very interesting study on composites. You need to look at this one as it illustrates why high caries individuals restorative may break down faster. 
Dental Materials
Volume 27, Issue 3, March 2011, Pages 244-252

Márcio A.P. Borgesa, Irma C. Matosa, Corresponding Author Contact Information, E-mail The Corresponding Author, Luis C. Mendesb, Ailton S. Gomesb and Mauro S. Mirandac
a Brazilian Navy, Navy Central Clinic, Rio de Janeiro, RJ, Brazil
b Institute of Macromolecules, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
c Department of Dentistry, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Received 14 December 2009;  
revised 10 April 2010;  
accepted 15 October 2010.  
Available online 13 November 2010. 


Abstract

Objectives


The aim of this study was to evaluate the degradation of different resin filling materials after a caries challenge, by high performance liquid chromatography (HPLC) and contact angle (θ) measurement.

Methods


Four different polymeric restorative materials (a resin composite, a polyacid-modified resin composite, an ormocer and a resin-modified glass ionomer cement) were tested. Five samples (30 mm × 6 mm × 2 mm) of each material were formed in a Teflon mold, following the manufacturer's instructions. After pH cycles, the solutions were injected in an HPLC. The θ was obtained, before and after pH cycle, by a goniometer at 60% air humidity and 25 °C. A distilled water drop (0.006 ml) was put on the material surface, and after 6 min, 10 measures were obtained at 20 s intervals. Each sample received 4 drops, one at a time, on different areas.

Results


HPLC results showed elution of byproducts in all materials. This was greater in the acid medium. Bis-GMA and TEGDMA were detected in TPH Spectrum and Definite residues. Analyses of the contact angle by ANOVA and Student–Neuman–Keuls's test showed that the surfaces of TPH Spectrum, Dyract AP and Definite were altered, except Vitremer (p < 0.05).

Significance


All materials tested degraded on a caries simulated medium, suggesting that a great effort should be made to disseminate oral health information, since a high caries challenge environment (low pH) can lead to dental composite degradation, with potential toxic risks to patients.

Friday, February 25, 2011

Isolite's new small deep vestibule (DV) mouthpiece

As an Isolite user this will be helpful! MJ

Isolite Systems, maker of the award-winning Isolite™ and Isodry dental isolation systems, will debut a new small deep vestibule (DV) mouthpiece for its dental isolation systems at the Chicago Dental Society’s Midwinter Meeting in Chicago, Feb. 24–26.
Both dental isolation systems hold the patient’s mouth open, keep the tongue out of the working field and guard the patient’s airway –— all while continuously evacuating saliva and excess moisture. Working with Isolite Systems’ dental isolation technology allows dental professionals to perform procedures more efficiently with greater control over the oral environment.
The super-soft Isolite mouthpiece used with the Isolite and Isodry systems makes for a more comfortable experience for the patient, allowing the patient to rest his/her jaw on a soft-bite block versus having to hold it open for the entire dental procedure. With the tongue comfortably retracted by the Isolite mouthpiece, it is kept safely away from the dental procedure and the dental drill in order to avoid unintentional injury of the tongue. Additionally, the Isolite mouthpiece shields the patient’s airway as an added measure of safety to prevent inadvertent aspiration of a foreign body, such as a broken or extracted tooth, crown or implant.
With the addition of the new small DV mouthpiece to its product line-up, Isolite Systems now makes available six distinct super-soft mouthpieces that are designed to fit patients varying in size — from small children to large adults.
The new size was developed for patients that need a small bite-block, but have a relatively deeper vestibule compared to other small-mouthed people. For these patient types, the new shape and design of the small DV mouthpiece allows for an even more complete tongue retraction and better fit in the mouth. Its expanded cheek shield shape provides improved suction that goes deeper into the vestibule. The new design also features a more stable bite block that provides for additional suction capacity behind the bite block, insuring saliva does not pool behind the mouthpiece.
The new small DV mouthpiece was developed based on customer feedback. “We had such a positive response to the medium DV mouthpiece that we introduced, we wanted to bring those advantages to our smaller-sized mouthpiece,” said Dr. Thomas Hirsch, Isolite Systems co-founder and director of clinical relations.
For more information about Isolite Systems and its products, including a video tour and clinical videos, please visit www.isolitesystems.com or call (800) 560-6066.

Thursday, February 24, 2011

DentalEZ® Group Now Offers Continuing Education



Malvern, PA (February 15, 2011) DentalEZ® Group, a supplier of innovative products and services for dental health professionals worldwide, is pleased to announce the availability of its new Online Continuing Education program for dental professionals.  

DentalEZ recently partnered with Viva Learning for all of its web-based continuing education initiatives.  Its new CE website, www.dentalezlearning.com, will launch this month and the first Live Webinar will be available on March 10th.

A variety of educational topics will be addressed through interactive, live CE webinars, product training videos, and "How to Guides."   The new site also offers dental professionals immediate access to its multimedia training library where new techniques, best practices, products and equipment will be explored.  The CE webinars will be available indefinitely through “On-Demand Classes” archived on the site. 
“DentalEZ is pleased to offer an accessible online learning platform for customers who are interested in broadening their industry skills and knowledge,” remarked Randy Arner, DentalEZ VP of Marketing. “Our goal is to provide dental professionals accredited, engaging, and convenient online CE.”
"We are very excited that DentalEZ has chosen Viva Learning as their online CE platform," says Philip Klein, CEO of Learn HealthSci.  "We look forward to working with DentalEZ on the preparation, delivery, and management of their content as well as the marketing of their classes to the profession."


All Continuing Education credits obtained through the new website are provided by an approved American Dental Association (ADA) CERP provider.

Visit DentalEZ’s Online Learning Site today at www.dentalezlearning.com, or access the link any time through www.dentalez.com .

Wednesday, February 23, 2011

See You At The Chicago Mid Winter Meeting

He you are attending the Chicago Mid Winter Meeting. Please stop by on Thursday at noon or 2 PM for a discussion on social media. The lecture is free.   More information and to sign up. 

On Friday you can catch me between 11:30 AM and 3 PM discussing 21st Century Caries Detection in the Air Techniques Booth. 


So stop by and say hello

Tuesday, February 22, 2011

Commonly Prescribed Osteoporosis Drug Associated With Very Low Risk Of Serious Jaw Disease


15 Feb 2011  

A commonly prescribed osteoporosis drug is associated with a slightly elevated risk of developing the rare, but serious condition, osteonecrosis of the jaw; nonetheless the risk remains extremely low. These findings are published online in the Journal of Dental Research, the official journal of the International and American Associations for Dental Research. Although the findings are provocative, study authors say they should be carefully considered against the large benefit of these drugs to prevent and treat osteoporosis.

The study was funded by the National Institutes of Health and conducted by researchers from the Kaiser Permanente Center for Health Research and HealthPartners Research Foundation. The study examined medical records from nearly 600,000 patients and is part of the Dental Practice-Based Research Network a consortium of participating practices and dental organizations committed to advancing knowledge of dental practice and ways to improve it.

"Oral bisphosphonates, usually prescribed for osteoporosis patients, appear to increase the risk of osteonecrosis of the jaw, but the risk is still very low," said the paper's lead author, Jeffrey Fellows, PhD, an investigator with the Kaiser Permanente Center for Health Research. "Previous studies suggested that about one percent of oral bisphosphonate users may develop osteonecrosis of the jaw, but our study found a much lower rate, less than one-tenth of one percent. The risk is still real and patients should take necessary precautions, but they shouldn't be alarmed."

"These drugs are very helpful in treating osteoporosis and preventing fractures so for the large majority of patients the benefits of taking them far outweigh the small risk found in this study," says Michael Herson, MD, Chief of Endocrinology and Metabolism, Northwest Permanente Medical Group, which was not involved in the study. "If patients have questions about taking these drugs they should consult with their physicians."

Osteonecrosis of the jaw is difficult to treat and occurs when blood flow to the bone is reduced, leaving an area of the jaw bone exposed for longer than 6-8 weeks. Most cases have been reported in cancer patients taking intravenous bisphosphonates; the risk associated with oral bisphosphonates is less clear. This study attempts to quantify that risk in a large, defined population. It is important to establish what the risk is because bisphosphonates are widely prescribed to osteoporosis patients. According to a 2009 paper in the American Journal of Health-System Pharmacy, 4.7 million Americans are taking oral bisphosphonates.

The new paper published in the Journal of Dental Research examined electronic medical records of 572,606 patients from 1995 to 2006. Researchers found 23 cases of osteonecrosis of the jaw, most among patients who were not taking oral bisphosphonates, but had other risk factors including cancer, head and neck radiation therapy, and osteoporosis.

Nearly 4 percent of the patients, or 21,164 people, were prescribed oral bisphosphonates, but only six of those patients, or about one in 3,500, developed osteonecrosis of the jaw. Patients taking oral bisphosphonates were nine times more likely than those who didn't to develop the condition.

"Invasive dental procedures may also increase the risk of osteonecrosis of the jaw, so patients who need those procedures may want to get them before starting on oral bisphosphonates," said Dr. Daniel Pihlstrom, a co-author on the study and associate director for Evidence Based Care and Oral Health Research at Permanente Dental Associates. "Patients who are already taking these drugs don't need to stop in order to get dental care, but if they need an invasive dental procedure they should inform their dentist or oral surgeon that they are taking the drugs," added Pihlstrom.

The authors caution that their confidence in the association between oral bisphosphonates and osteonecrosis of the jaw is limited because they found so few cases. The small number of cases also limited their ability to control for other risk factors. Also, since osteonecrosis of the jaw did not have a diagnosis code before 2007, the authors used a computer program to search medical records for any diagnosis, procedure, or physician chart note that could indicate a possible case. Manual chart review was used to confirm osteonecrosis of the jaw among patients identified by the computer. Some additional cases were found through conversations with general dentists and oral surgeons serving patients from each health care organization. While the search was extensive, there is a chance that some cases were missed.

The study was supported by grants DE-16746 and DE-16747 from the National Institutes of Health. Authors of the paper include Jeffrey L. Fellows, PhD, and Christine M. Gullion, PhD, from the Kaiser Permanente Center for Health Research in Portland, Ore.; Daniel J. Pihlstrom, DDS, with Permanente Dental Associates in Portland; D. Brad Rindal, DDS, and William Rush, PhD, with HealthPartners Research Foundation in Minneapolis; Andrei Barasch, DMD, MDSc., with the Department of General Dental Sciences, University of Alabama at Birmingham; and Joshua Richman, MD, PhD, with the Division of Preventive Medicine, University of Alabama at Birmingham.

Source: Kaiser Permanente

Monday, February 21, 2011

Free-Motion Elbow Support System by DentalEZ®

Launching at Chicago Midwinter Meeting

Attaches to any DentalEZ® or Existing Stool
and Helps Reduce Muscular Tension and Fatigue

Malvern, PA (February 15, 2011) DentalEZ® Group, a supplier of innovative products and services for dental health professionals worldwide, will unveil the new Free-Motion Elbow Support System by DentalEZ® during this year’s Chicago Midwinter Meeting at booth #1405. 

The comfortable Free-Motion Elbow Support System is compatible with all DentalEZ dental stools or any stool available on the market, and is easily fastened to the stool cylinder.  The telescoping elbow height adjustment locks in place quickly and securely with a simple thumb lever. 

The Free-Motion Elbow Support System by DentalEZ supports the elbow of the dental professional without limiting movement or interfering with dental procedures.  Designed to reduce muscular tension and fatigue, the ergonomic Free-Motion Elbow Support System features two free-moving, height-adjustable elbow supports that follow every movement without restriction while providing complete support and stability of the neck, back, arm, and shoulder muscles.

“The dental professional sits on a stool for an average of 8 hours per day, 4 days per week, and it can seriously affect the dental professional’s health,” remarked Aggie Pennington, DentalEZ Senior Equipment Product Manager.  “We are pleased to introduce a product that is ergonomically designed to promote longevity of the dental professional’s career.”

 
The Free-Motion Elbow Support System encompasses a high-strength design with solid-steel
components.  The integral skin-foam technology features a non-slip texture that is easy to disinfect and fluid-proof.  Heavy-duty ball joints with tension adjustment knobs allow the elbow rests to glide horizontally with ideal resistance, and are adjustable from zero to fully fixed. 

Experience the incredible comfort and effortless movement of the new Free-Motion Elbow Support System by DentalEZ at the Chicago Midwinter Meeting, Booth #1405, or call 866-DTE-INFO. 

Saturday, February 19, 2011

The incorporation of casein phosphopeptide–amorphous calcium phosphate into a glass ionomer cement

Here is an interesting study on reminerilzation and reduction of caries.This may have significant future implications for MID.  MJ

Dental Materials Volume 27, Issue 3, Pages 235-243 (March 2011)
Hanan Al Zraikata, Joseph E.A. PalamarabCorresponding Author Informationemail address, Harold H. Messerb, Michael F. Burrowb, Eric C. Reynoldsb

Abstract 

Objectives
The aim of this study was to measure the effect of incorporating CPP–ACP into an autocure GIC on physical and mechanical properties, ion release and enamel demineralization inhibition.
Methods
Physical and mechanical properties were evaluated using tests specified by the International Organization for Standardization (ISO). Concentrations of fluoride, calcium and inorganic phosphate in deionized water (pH 6.9) and lactic acid (pH 4.8) were measured up to five months. Cavities on human extracted molars were prepared, restored with GIC (control), CPP–ACP modified GIC or resin composite, then stored in 50mM lactic acid solution at pH 4.8 for 4 days. Sections of demineralized enamel were examined using polarized light microscopy followed by lesion area measurement.
Results
The incorporation of up to 5% CPP–ACP into Fuji VII decreased the cements’ strength and prolonged setting time. However, values remained within ISO limits. The incorporation of 3 or 5% CPP–ACP significantly decreased fluoride release, while higher calcium and inorganic phosphate release occurred. The demineralized enamel area adjacent to GIC with 3 or 5% CPP–ACP was significantly smaller compared to GIC control.
Significance
The incorporation of 3% CPP–ACP into GIC has the potential to improve its anticariogenic ability without adversely affecting its mechanical properties.

Friday, February 18, 2011

Effectiveness of a new one-step self-etch adhesive in the restoration of non-carious cervical lesions: 2-Year results of a randomized controlled practice-based study

Dental Materials Volume 27, Issue 3, Pages 304-312 (March 2011)

Hélène Frona, Jean-Noël Vergnesb, Christian Moussallyc, Stéphane Cazierc, Anne-Laure Simonc, Jean-Baptiste Chiezec, Guillaume Savardc, Gil Tirletc, Jean-Pierre Attala

Abstract 

Objectives
The purpose of this practice-based randomized controlled trial was to evaluate the effectiveness of a new one-step self-etch adhesive to restore non-carious cervical lesions following CONSORT guidelines and to test the hypothesis that this adhesive is equally effective with or without beforehand selective etching of enamel.
Methods
Twenty-eight patients each received two restorations randomly assigned to the control or the experimental group. In the control group, the adhesive (Bond Force, Tokuyama) was applied without beforehand enamel phosphoric-acid-etching, whereas the latter was applied first in the experimental group. The restorative composites used for all restorations were Estelite Flow Quick followed by Estelite Sigma (Tokuyama). The clinical effectiveness was assessed at baseline, 6 months, 1 year and 2 years in terms of retention, marginal staining, restoration staining, and post-operative sensitivity.
Results
One restoration loss occurred in the control group before the 6-month recall. At the two-year recall, only 2 secondary endpoints showed significant differences between groups: marginal staining at the enamel occurred more often in the control group (29% vs. 5%) (hierarchical linear regression: p=0.011) and ‘minor marginal defects’ were significantly more frequent in the control group (29% vs. 0%) (hierarchical linear regression: p=0.009).
Significance
Although in a practice setting, the effectiveness of this new adhesive was very good after 2 years of clinical service. More minor defects and restoration staining at the enamel margin were noticed when enamel had not been selectively acid-etched. Selective enamel acid-etching might enhance the adhesive properties of this new one-step self-etch adhesive.

Thursday, February 17, 2011

Potential Tooth Loss Link To Breast Cancer

13 Feb 2011  

A new study suggests that women may be over 11 times more likely to suffer from breast cancer if they have missing teeth and gum disease.

The study (1), carried out by the Karolinska Institute in Sweden on over three thousand patients, showed that out of the 41 people who developed breast cancer those who had gum disease and loss of teeth were 11 times more likely to develop cancer.

As this appears to be the first study presenting such findings, Chief Executive of the British Dental Health Foundation, Dr Nigel Carter, believes more needs to be done in order to confirm the results.

Dr Carter said: "If future studies can also testify to the link between missing teeth and breast cancer, more has to be done to raise public awareness on the issue. The British Dental Health Foundation has a history of campaigning for better oral health, and the findings presented in the study indicate another clear link between your general and oral health."

Gum disease is caused by the bacteria in dental plaque. As the disease gets worse the bone anchoring the teeth in the jaw is lost, making the teeth loose. If this is not treated, the teeth may eventually fall out. In fact, more teeth are lost through periodontal disease than through tooth decay.

In the past several findings have been released to support the notion infections in the mouth can affect other areas of your general health. In people who have gum disease, it is thought that bacteria from the mouth can get into the blood stream and affect the heart, causing a higher risk of heart disease. The same principles affect those with diabetes, as people with the condition are more likely to pick up infections. People with gum disease are also thought to be at a higher risk of strokes, chest infections, and pregnant women are seven times more likely to have a premature baby with a low birth weight.

As gum disease develops painlessly, there aren't many ways in which you can detect problems evolving. Look out for inflamed gums causing them to be red, swollen and bleed easily, an unpleasant taste in your mouth, bad breath, loose teeth and regular mouth infections. With only a few of these symptoms visible, Dr Carter recommends a safe course of action if you start showing any signs of gum disease.

Dr Carter said: "The best way to prevent and treat gum disease is to ensure you remove all the plaque from between your teeth by brushing for two minutes twice a day with fluoride toothpaste. You also need to clean in between your teeth at least once a day with interdental brushes or dental floss as this is the area where gum disease starts. Regular visits to the dentist can also help to identify early signs of gum disease."

(1) Söder, B, Yakob, M, Meurman, J, Andersson, L, Klinge, B, Söder, P, 8 October 2010, 'Periodontal disease may associate with breast cancer', Karolinska Institute, Sweden. The main purpose of the study was to evaluate the association between periodontal (gum) disease and the prevalence of breast cancer in 3273 randomly selected subjects aged 30-40. Breast cancer incidence was registered from 1985 to 2001 according to the WHO International Classification of Diseases criteria. At baseline, 1676 individuals also underwent a clinical oral examination (Group A) whereas 1597 subjects were not clinically examined but were registered (Group B). The associations between breast cancer, periodontal disease, and missing molars were determined using multiple logistic regression models with several background variables and known risk factors for cancer.

Source: British Dental Health Foundation

Wednesday, February 16, 2011

Join Me For a Discussion About Social Media

Join us for the 2011 Midwinter Meetup!
Midwinter Meeting logoAre you tweeting about dentistry?

Do you "Like" the
Chicago Dental Society?
Do you wonder how social media tools like Facebook and Twitter can benefit your practice?

Wonder no more!
Together with DrBicuspid.com, the Chicago Dental Society is hosting a meetup on the first day of the Midwinter Meeting.

We're bringing dentists together with two noted experts to discuss how social media can affect--and help--your dental practice.

Tuesday, February 15, 2011

IADR/AADR Journal of Dental Research releases large studies on osteonecrosis of the jaw

Results may have an important impact to the developing of better definitions for ONJ

Alexandria, VA – Osteonecrosis of the jaw (ONJ) is a debilitating bone condition that affects the jaws and occurs as a result of reduced local blood supply to the bone. The literature in this area has been severely limited since most investigations cannot evaluate sufficient numbers of afflicted individuals to accurately determine the incidence of the disease and associated risk factors. Today, the International and American Associations for Dental Research's Journal of Dental Research (JDR) released a research report that estimates the prevalence of the disease, and a case-control study on bisphosphonate use and other risk factors. These investigations published in the JDR represent some of the largest published studies to date on ONJ patients, and the researchers involved utilized the National Institute of Dental and Craniofacial Research-supported Practice-based Research Networks (PBRNs).
In a JDR article titled "Risk Factors for Osteonecrosis of the Jaws: a Case-control Study," authors A. Barasch, J. Cunha-Cruz, F.A. Curro, P. Hujoel, A.H. Sung, D. Vena and A.E. Voinea-Griffin conducted a case-control study with three DPBRNs to determine the risk associated with bisphosphonates and identify other risk factors for ONJ, including dental diseases and procedures. Researchers enrolled 191 ONJ cases and 573 controls from 119 dental practices. Bisphosphonate use was strongly associated with ONJ with an odds ratio of 299.5 for intravenous use and 12.2 for oral use.
In a second JDR article titled "ONJ in Two Dental Practice-Based Research Network Regions," authors J.L. Fellows, D.B. Rindal, A. Barasch, C.M. Gullion, W. Rush, D.J. Pihlstrom and J. Richman conducted a Dental Practice-based Research Network (DPBRN) study that estimated ONJ incidence and odds ratios from bisphosphonate exposure and other risk factors using patients' electronic records. The researchers identified 572,606 health plan members and of those patients, approximately 25,000 had a diagnosis or procedure code that suggested a necrotic bone lesion, including inflammatory jaw condition, cyst of bone, aseptic necrosis of the bone and open wound of the jaw. Of those members' electronic medical records, 73 suspected ONJ cases were identified, of which 16 were later confirmed by manual chart review. An additional seven cases were indentified through oral surgeons or the Peer Review Committee for a total of 23 confirmed ONJ cases. Patients with oral bisphosphonates were 15.5 times more likely to have ONJ than non-exposed patients. However, the number of ONJ cases limits firm conclusions and suggests absolute risks for ONJ from oral bisphosphonates is low.
"ONJ represents a challenging clinical dilemma affecting dental and cancer patients, and communities at many levels of dentistry, notably oral/maxillofacial surgery and oral oncology are called upon to manage these cases," stated JDR Editor-in-Chief William Giannobile. "The work underscores important clinical implications that will be of value to not only the IADR and AADR communities, but especially practicing clinicians.
A perspective article titled "Making a Case for Defining Osteonecrosis of the Jaw" was written by C. Van Posznak, breast cancer oncologist expert on the topic. In it, she summarizes the key implications of ONJ and the relevance in the field of the two JDR research reports. The research that was conducted may have an important impact to the developing of better definitions for ONJ.
###
All three of these articles are published in the Journal of Dental Research. Visit http://jdr.sagepub.com/content/early/recent for links to the complete articles or contact Ingrid L. Thomas at ithomas@iadr.org to request the PDFs.
About the Journal of Dental Research
The IADR/AADR Journal of Dental Research is a multidisciplinary journal dedicated to the dissemination of new knowledge in all sciences relevant to dentistry and the oral cavity and associated structures in health and disease. At 4.195, the JDR holds the highest Five-Year Impact Factor of all dental journals publishing original research, with a cited half-life >10 years, reflecting the influential nature of the Journal's content. It also has the highest Eigenfactor Score in the field.
About the International Association for Dental Research
The International Association for Dental Research (IADR) is a nonprofit organization with nearly 12,500 individual members worldwide, dedicated to: (1) advancing research and increasing knowledge to improve oral health, (2) supporting the oral health research community, and (3) facilitating the communication and application of research findings for the improvement of oral health worldwide. To learn more, visit www.iadr.org. The American Association for Dental Research (AADR) is the largest Division of IADR, with nearly 4,000 members in the United States. To learn more, visit www.aadronline.org.

Monday, February 14, 2011

How to Use the Power of Your Smiles to Your Advantage

Smiles have the power to break down the cold walls of indifference and warm a lonely heart that's blue. Discover one of life's most constructive weapon and that's the power of your smile positioned for your own advantage.


Read how to use your smile

Saturday, February 12, 2011

Popular Infant Juices Contain Too Much Fluoride, Research Shows

NEW YORK, Jan. 31, 2011 /PRNewswire-USNewswire/ -- Commonly-consumed infant fruit juices contain fluoride, some at levels higher than recommended for public water supplies which can damage teeth, according to research to be presented on March 17, 2011 at the International Association for Dental Research annual meeting in San Diego.(1)

Ninety samples of three different flavors (apple, pear and grape) from three manufacturers were tested. All contained fluoride at concentrations ranging from 0.11 to 1.81 parts per million (ppm).

"Children who consume excessive amounts of juice per day may be ingesting more fluoride than the recommended daily intake," the researchers report.

Recently, the U.S. Department of Health and Human Services recommended lowering "optimal" water fluoride levels to 0.7 ppm to decrease the epidemic of fluoride-discolored teeth (dental fluorosis) afflicting over 41% of adolescents. Many cities are complying; some consider ending fluoridation.

Attorney Paul Beeber, President, New York State Coalition Opposed to Fluoridation says, "Water fluoride, along with fluoride-containing pesticide residues, is contaminating the food supply and harming our children. Clearly, artificial fluoridation must stop completely."

"Fluoride is neither a nutrient nor required for healthy teeth. Studies show fluoride ingestion doesn't reduce tooth decay," says Beeber.

Earlier research shows all infant formulas, whether ready-to-feed, concentrated or organic, contain some fluoride, (October 2009 Journal of the American Dental Association).(2)

Researchers found fluoride in chicken products frequently eaten by children but not listed on labels, e.g. pureed chicken, chicken sticks, and luncheon meat made with mechanically-separated chicken. Fluoride-containing bone-dust invariably gets into the finished product (Journal of Agricultural and Food Chemistry September, 2001).(3)

Safe fluoride intake could "be exceeded on a recurring basis when combined with other sources of fluoride intake such as fluoridated water, foods made with fluoridated water, and swallowing of fluoridated toothpaste," write researchers, Fein and Cerklewski.

"Current evidence strongly suggests that fluorides work primarily by topical means through direct action on the teeth and dental plaque. Thus ingestion of fluoride is not essential for caries (cavity) prevention," report Warren and Levy in Dental Clinics of North America, April 2003. "There is no specific nutritional requirement for fluoride," they write.(4)

Friday, February 11, 2011

Dental Implants Can Be Successful With Less Root Than Crown

02 Feb 2011

Dental implants are now a common way to replace a tooth. But a dentist must first determine that an implant restoration can be successful for a particular patient. As an indicator, dentists use the crown-to-root ratio-how much of the tooth extends above the jawbone and how much is in the bone. However, the ideal crown-to-implant ratio for the replacement tooth has yet to be determined.

A new study in the current issue of the Journal of Oral Implantology evaluated the health of implants that had been in place more than 5 years. By examining the crown-to-implant ratios in these cases, the authors found that this factor was not as important to the success of implants as previously thought.

Radiographs were used to examine 309 single-tooth short-length implant-supported restorations in 194 patients. All the implants had been surgically placed between February 1997 and December 2005.

The ideal crown-to-root ratio for a tooth to serve as an abutment for a partial denture is considered 1 to 2-twice as much root as crown. But previous studies have given mixed results about ratios for implanted teeth. Excessive crown-to-implant ratios have been named as detrimental to long-term survival of an implant, while disproportionate ratios have been noted in high rates of implant survival.

The current study found an average crown-to-implant ratio of 2 to 1. Natural teeth with such ratios would often be recommended for extraction and replacement. The authors found that stable implants could be produced with less of the tooth serving as root. Additionally, the study found no statistically significant relationship between increasing crown-to-implant ratios and decreasing bone-to-implant contact levels around the implant.

Full text of the article, "Crown-to-Implant Ratios of Short-Length Implants," Journal of Oral Implantology, Vol. 36, No. 6, 2010, is available here.

Thursday, February 10, 2011

The relationship among temporomandibular dysfunction and hearing alterations

Rev. CEFAC vol.12 no.6 São Paulo Nov./Dec. 2010 Epub Sep 08, 2010
ABSTRACT

BACKGROUND: the balance referring to the structures and functions of the stomatognatic system depends on the appropriate functioning of the Temporomandibular Joint, and this one, needs the correct teeth occlusion for accomplishing the functional needs when moving the jaw. The muscle or structural unbalance of the Temporomandibular Joint may result in a dysfunction of this joint and cause diverse signs and symptoms such as hearing manifestations, namely: tinnitus and ear pain.
PURPOSE: literature review in the areas of audiology, otolaryngology and dentistry aiming at associating them with Temporomandibular Dysfunction and show the importance of multidisciplinary activities, emphasizing the speech action in such dysfunction.
CONCLUSION: many hypotheses try to explain the existent relationship among the Temporomandibular Dysfunction and hearing alterations. We verified that there is a link between the stomatognatic system and the hearing system. However, most important than just associating the stomatognatic and hearing systems, the team has been involved in the assistance to the patients, including the speech therapy professional that must have knowledge about anatomy and physiology of the Temporomandibular Joint and related disorders, causes and consequences. The said professional should be capable to distinguish the effective therapy for each disorder and evaluate the indications and contra-indications of each one, and, finally, examine the conduct with referrals being appropriate for the case evolution.

Wednesday, February 09, 2011

3M ESPE Named Most Innovative

ST. PAUL, Minn. – (February 3, 2011) – For the sixth year in a row, 3M ESPE ranks as the most innovative company in the worldwide dental industry, according to the 2010 Dental Industry Review conducted by The Anaheim Group, distributors of Dental Fax Weekly.

“It is ingrained in the culture of 3M to share information on materials and markets along with every technology at our disposal across the entire company,” said Larry Lair, Division Vice President and General Manager, 3M ESPE. “There are many stories in this company of technology cross-pollination that have led to breakthrough innovations that really make a difference for our customers. Every day we are working to leverage the resources of the total company to help solve problems and make things better for our dental customers and partners around the world.”

Elaborating on 3M’s many stories of innovation, 3M ESPE Global Business Director Jim Ingebrand said, “The same technology used to mix impression materials in our Pentamix™ Mixing Unit is being used by auto-body repair specialists to mix fillers for automobile body work. Similarly, nanotechnology that improves the performance of Filtek™ Supreme Ultra Universal Restorative for dentists is helping to create the next generation of fishing rods. This deep of a technology pool better enables us to meet dental professionals’ needs and in turn, helps make them more successful.”

Data showing an average of 45 innovations per year for 3M ESPE puts the company head and shoulders above other manufacturers during the past six years. This model of consistency in innovation continues to produce industry firsts, as well as best-in-class solutions for use throughout the life cycle of the tooth.

“According to the 2010 Booz and Company Global Innovation Study, 3M ranks as the third most innovative company in the world, behind only Apple and Google,” continued Lair. “That type of reputation isn’t earned by chasing any and every idea that comes across the desk, but through purposeful innovation aimed at helping customers overcome their challenges.”

The Anaheim Group considers three components in its innovation index, including: FDA 510(k) new product clearances for the U.S. market; United States Patent Office dental industry patents; and dental patents from the European Patent Office and the World International Patent Office. The Dental Industry Review summarizes the key business and technical events occurring in the worldwide dental industry.

Tuesday, February 08, 2011

Patients Can Find Low Cost and Free Dental Care Web Site

New York, NY, Feb. 2, 2011 – WorlDental.org, online Dental Health Magazine reported about more than 1500 free dental events since the last February. More than 1 million readers were able to find affordable and free dental services.

Many organizations and dental insurers recognize February as Dental Health Month, the time when dental professionals try to raise awareness about the importance of dental health and offer free dental care to needy.

"More than 40% of Americans do not have dental insurance", said Christina Malitowski, editor of WorlDental.org. "According to recent study, that prevents 83% of them from having dental check-ups."

"Dental Health Month is a chance for uninsured to receive dental care they need", explained Malitowski.

During February thousands of dentists and dental clinics volunteering in programs such as Give Kids A Smile, Dentistry From the Heart providing free dental education and services to uninsured kids and adults across the country.

"We all know that dental health is very important. WorlDental.org regularly reports about free dental events scheduled to reach people in need of help," said Malitowski. "We also encourage dentist and other dental professionals to take a part in these great events."

Patients who are interested in finding free dental care can visit WorlDental.org site’s section: Free Dental Care Reports.

Very few low-income people know where to ask for affordable and free dental help. Most of volunteer dentists use Internet to inform needy about events scheduled. However, the economic crisis reduced the number of dentists willing to provide free dental care services.

"We saw the increase of visitors coming to WorlDental.org in search of free and affordable dental care opportunities since last year," said Christina Malitowski. "And we are glad that we can provide them information about care they can afford."

For more information on oral health and free dental care, visit www.worldental.org.

WorlDental.org, popular online dental health magazine with more than 127,000 visitors per month, posts oral health articles, dentistry news and affordable dental care opportunities.

Monday, February 07, 2011

"Growing Our Own" Report Offers Solutions To Address Decline In U.S. Dental Faculty

A new report by an Indiana University School of Dentistry department chair with researchers from six other U.S. dental schools is calling for quick and creative solutions to address the growing scarcity of full-time faculty members within the nation's dental school programs.


The report cites widening pay gaps between private practice dentists and clinical professors at dental schools as one factor in fewer dentists committing to careers in teaching. Clinical faculty also report being overwhelmed and burned out by the workload demands of teaching, clinical, research and administrative responsibilities. Published in the January edition of the Journal of Dental Education, the paper calls for the development of mandatory mentoring programs, among other recommendations, to help reverse the trend.

"We feel it is essential that mentoring programs be considered mandatory within dental schools if this trend toward a major crisis in dentistry is to be reversed as rapidly as possible," said Dr. Vanchit John, chairman of the IU School of Dentistry's Department of Periodontics and Allied Dental Programs and the lead author of the report. "Clinical faculty shortages could be characterized as the most critical challenge confronting dentistry."

Citing an average of almost seven faculty vacancies per dental school and an average pay gap between general practice dentists and clinical faculty of $86,000 a year, the report, titled "Recruitment, Development and Retention of Dental Faculty in a Changing Environment," offers a comprehensive outline for restoring teaching numbers.

Among other proposals are improved faculty compensation, new loan and tuition repayment and waiver programs, junior faculty development scholarships and allowing more flexibility for clinical faculty to have time for private practices.

"We're calling it the 'Growing Our Own' plan," John said. "And the concept of growing our own faculty and developing mentoring programs should serve as cornerstones to help resolve shortages."

If dental school administrators were to develop in-school programs that identify students and specialty residents interested in the idea of teaching as a career then knowledge about those opportunities would increase, the report notes. Recent data show only 25 percent of current dental faculty aware that a mentoring program was available at their school, and 35 percent said they had never received any mentoring themselves. Within dental faculty that did receive mentoring, one in four said they were dissatisfied with the experience.

The report recommends dental schools commit to a series of seven specific steps toward developing successful mentoring programs:

- Provide adequate faculty time for mentoring.
- Choose and assign appropriate mentor-mentee teams.
- Require regular meetings and follow-ups among the teams and the administration.
- Involve department chairs in the process.
- Develop long-range goals for the mentee.
- Provide feedback and advice regularly to the teams from senior faculty and administration.
- Consider development of cross-disciplinary mentoring teams on university campuses.

While mentoring should serve as the cornerstone for reversing the trend of faculty shortages, those programs alone won't address all the problems pointed out in the report, John said. Individual institutional and national programs should also be developed with goals of improving faculty compensation, allowing increases in practice time for clinicians, and allowing clinicians more freedom for consulting and lecturing opportunities.

Saturday, February 05, 2011

Effectiveness of a lower lingual arch as a space holding device

  1. Eur J Orthod (2011) 33 (1): 37-42. doi: 10.1093/ejo/cjq022

Abstract

The aims of this study were to evaluate the effectiveness of a lower lingual holding arch (LLHA) in maintaining arch length, and to compare the effectiveness of two LLHAs made of two different gauges (0.9 and 1.25 mm) of stainless steel (SS) wire.
The sample comprised 44 subjects (24 males and 20 females) who for various reasons attended orthodontic clinics at Jordan University of Science and Technology Dental Teaching Center. The subjects were randomly divided into two treatment groups. The first group contained 20 subjects (12 males/8 females, average age 10.76 ± 0.75 years). The LLHA used in this group was made of 0.9 mm SS wire. The second group comprised 24 subjects (12 males/12 females, average age 10.57 ± 0.54 years). The LLHA used in this group was made of 1.25 mm SS wire. The third group consisted of 23 subjects (15 males/8 females, average age 10.63 ± 0.66 years) who served as the control. The records consisted of lateral cephalograms, dental pantomograms, and study casts. Paired t-test, analysis of variance, and chi-square tests were used to determine whether significant differences existed between the groups.
In both treatment groups, the lower incisors proclined and moved forward, and space loss of the lower primary second molar occurred. The LLHA made of 0.9 mm SS was superior to that made of 1.25 mm SS in terms of arch length preservation.

Friday, February 04, 2011

The effects of temperature and bleaching gels on the properties of tooth-colored restorative materials

The Journal of Prosthetic Dentistry
Volume 105, Issue 2, Pages 100-107 (February 2011)
Hao Yu, DDS, PhD, Dr med denta, Qing Li, DDS, PhDb, Hui Cheng, DDS, PhDcCorresponding Author Informationemail address, Yining Wang, DDS, PhDd
Statement of problem
The effects of bleaching on tooth-colored restorative materials remains controversial. Since previous in vitro research has been performed at different environmental temperatures, it is hypothesized that the temperature differences may be the reason for the conflicting reported results.
Purpose
The purpose of this study was to examine the effect of a simulated at-home bleaching regimen on surface and subsurface microhardness of restorative materials at 2 different environmental temperatures.
Material and methods
Seven restorative materials were tested: 4 composite resins, a polyacid-modified composite (compomer), a conventional glass-ionomer cement (CGIC), and a ceramic. For each material, 48 specimens were prepared and divided into 4 groups (n=12): bleaching group at a temperature of 25°C, control group at 25°C, bleaching group at 37°C, and control group at 37°C. The specimens from the bleaching groups were treated with 10% carbamide peroxide for an 8-hour daily test period for 14 days, while the control specimens were stored in artificial saliva for 14 days. The surface and subsurface (0.1–1.0 mm) microhardness values were determined by a Vickers microhardness tester. The surface microhardness data were analyzed with 3-way ANOVA for the effect of different materials, bleaching, and environmental temperature. The subsurface microhardness data were analyzed with repeated measures 4-way ANOVA for the effect of different materials, bleaching, environmental temperature, and subsurface depth as a repeated measure. A post hoc Tukey's Honestly Significant Difference test was used for comparisons among different groups (α=.05).
Results
All of the materials showed a loss of surface microhardness, except for the ceramic after bleaching at 37°C. However, only the compomer and CGIC were found to have surface softening after bleaching at 25°C. For compomer and CGIC specimens, bleaching affected microhardness at different subsurface levels ranging from 0.1 mm to 0.5 mm. Bleaching at a higher temperature decreased the subsurface microhardness at deeper levels.
Conclusions
The effects of bleaching on restorative materials were material dependent. Environmental temperature influenced the effects of bleaching on surface and subsurface microhardness of restorative materials. Bleaching at increased temperatures showed greater softening effects on the surface and subsurface layers of dental materials.

Thursday, February 03, 2011

The Daily- New Content For Your iPad


  • The Daily is built from scratch for the iPad by some of the best in the business to bring you a package that’s smart, attractive, and entertaining.
  • On Wednesday, February 2, Rupert Murdoch, Chairman and Chief Executive Officer of News Corporation, announced the launch of The Daily on the iPad. Also present were Jon Miller from News Corporation, Eddy Cue from Apple, and The Daily’s Editor-in-Chief Jesse Angelo.
  • The Daily takes full advantage of the iPad’s storytelling and sharing capabilities. Stories, photos, video, audio and graphics come alive the more you touch, swipe, tap and explore.
  • The Daily publishes 365 days a year covering breaking news, sports, pop culture, entertainment, apps, games, technology, opinion, celebrity gossip and more.
  • The Daily is absolutely free for two weeks from the time you download it to your iPad.
  • The Daily is available through Apple’s iTunes subscription service and via the iPad App Store for $0.99 a week or $39.99 a year.
  • The Daily will be offered on additional tablets over the coming months.
  • While The Daily lives on the iPad, web-friendly versions of most of The Daily’s articles and features can be easily shared via Facebook, Twitter and email.
  • The Daily covers news, sports, gossip & celebrity, opinion, arts & life, and apps & games.
  • Launch advertisers on The Daily include HBO, Macy’s, Paramount, Pepsi Max, Range Rover, Verizon and Virgin Atlantic Airways.
  • The Daily has bureaus in New York and Los Angeles, and stringers across the country.
  • Some highlights of The Daily include:
    • Original content every single day of the year
    • Original videos
    • 360-degree photos you can explore by swiping
    • Immersive photography
    • Interactive charts, info-graphics and clickable hot spots
    • The option to save articles to read later
    • Web-friendly versions of articles you can share via Twitter, Facebook and e-mail
    • Your favorite sports teams’ scores, news and photos
    • In-app commenting — including audio comments
    • Your local weather
    • Crossword and sudoku puzzles every day
  • Executive staff bios are available at thedaily.com/about
  • The Daily is available now on the App Store: http://itunes.com/apps/thedaily

Wednesday, February 02, 2011

DentalEZ® Group Adds Multiple User-Friendly Features to its Corporate Website



Malvern, PA (January 25, 2011) – DentalEZ® Group, a supplier of innovative products and services for dental health professionals worldwide, is pleased to announce the addition of several new user-friendly features to its corporate website, www.dentalez.com.  

Some of the new features include:

·       Compare Pages – provide a detailed comparative side-by-side view of similar DentalEZ products.  The Compare Pages enable the visitor to view each product’s features and specifications to easily identify variations.

·       Green Dentistry Section – details all environmentally-friendly DentalEZ Group products available to help dental offices save time, reduce pollution, and conserve energy.

·       Capabilities eBrochure – aids visitors in learning more about the driving forces at the core of the company’s dedication to the dental industry and dental professionals.

·       Communications Center – provides quick links to DentalEZ’s vast online interactive resources, such as videos, blogs, Facebook®, Twitter®, and much more!

·       Updated Contact Information – customer service e-mail address links connect visitors to the appropriate DentalEZ departments and personnel for placing orders. 

Because the DentalEZ corporate website is regularly updated, the site consistently maintains a fresh, modern look and includes effortless navigation links and superior functionality.  The site incorporates and details all of the company’s product brands, including StarDental®, CustomAir®, RAMVAC®, DentalEZ® Equipment, and NevinLabs.

Additional features of the website include a complete product image library, convenient order tracking, an efficient literature ordering process for dentists and DentalEZ distributors,
and an Operatory Color Chooser tool which
instantly allows you to visualize your products and end-result.

The website also continues to allow visitors to download product literature and technical information, find a DentalEZ representative in their area of choice, and easily contact DentalEZ’s supportive staff of customer and technical service representatives.       

The DentalEZ website is intended to be a regular destination for clients, prospects, business partners, and journalists who are interested in the latest DentalEZ product news. 

For more information and a tour of the new website, please visit www.dentalez.com. 

Tuesday, February 01, 2011

Automatic Extraction of Inferior Alveolar Nerve Canal Using Feature-Enhancing Panoramic Volume Rendering


This paper appears in: Biomedical Engineering, IEEE Transactions on
Issue Date: Feb. 2011
Volume: 58 Issue:2
On page(s): 253 - 264 

Abstract

Dental implant surgery, which involves the surgical insertion of a dental implant into the jawbone as an artificial root, has become one of the most successful applications of computed tomography (CT) in dental implantology. For successful implant surgery, it is essential to identify vital anatomic structures such as the inferior alveolar nerve (IAN), which should be avoided during the surgical procedure. Due to the ambiguity of its structure, the IAN is very elusive to extract in dental CT images. As a result, the IAN canal is typically identified in most previous studies. This paper presents a novel method of automatically extracting the IAN canal. Mental and mandibular foramens, which are regarded as the ends of the IAN canal in the mandible, are detected automatically using 3-D panoramic volume rendering (VR) and texture analysis techniques. In the 3-D panoramic VR, novel color shading and compositing methods are proposed to emphasize the foramens and isolate them from other fine structures. Subsequently, the path of the IAN canal is computed using a line-tracking algorithm. Finally, the IAN canal is extracted by expanding the region of the path using a fast marching method with a new speed function exploiting the anatomical information about the canal radius. In experimental results using ten clinical datasets, the proposed method identified the IAN canal accurately, demonstrating that this approach assists dentists substantially during dental implant surgery