Implant-supported removable partial dentures in the mandible: A 3–16 year retrospective study
Available online 22 July 2016
Abstract
Purpose
The
purpose of this retrospective study was to assess performance, together
with biological and technical complications, of implant-supported
removable partial dentures (ISRPD) in mandibular Kennedy class I
situations with implants placed in the anterior or posterior position.
Methods
23
subjects with two endosseous implants to support a
bilateral-free-ending mandibular removable denture were examined. Eight
subjects had implants in the premolar (anterior) region and 15 subjects
implants in the molar (posterior) region. Biological and technical
complications were recorded from the patients’ medical record. Patients
filled out a validated questionnaire regarding their appreciation of
oral health related quality of life (OHIP-NL49) and a VAS score on
overall satisfaction.
Results
Over
a mean follow-up period of 8 years (median 8 years, range 3–16 years)
the cumulative implant survival rate was 91.7% (SE 0.05). Mean
peri-implant bone loss was 0.9 mm (SD 1.0 mm). Scores for bleeding on
probing, plaque and mucosal health were generally low, but significantly
worse for posteriorly placed implants. Significantly more biological
complications occurred in the posterior group (X2(1) = 3.9; p = 0.048).
In 65% of the cases no technical complications were registered. Mean
overall OHIP score was 16.1 (SD 18.4) and patients were highly satisfied
(VAS: 8.4; SD 2.1).
Conclusions
Within
the limitations of this retrospective study, in case of a Kennedy class
I situation in the mandible, an ISRPD is a viable treatment option with
a high implant survival rate and satisfied patients after a maximum of
16 years. Technical and biological complications should be anticipated.
Anteriorly placed implants performed slightly better.
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