Evaluation of Related Factors in the Failure of Endodontically Treated Teeth: A Cross-sectional Study
January 2018Volume 44, Issue
1, Pages 38–45
Abstract
Introduction
The
aim of this study was to review the factors related to the failure and
extraction of unsuccessful endodontically treated teeth.
Methods
A
total of 1000 teeth treated with nonsurgical root canal therapy were
analyzed, and the following information was recorded for each patient:
reasons for failure and extraction, type of tooth, presence and type of
coronal restoration, smoking status, age, gender, and level of
education. One main reason was recorded for each failed tooth. The
associations between reasons for failure, patient, and tooth were tested
by using χ2 analysis.
Results
Of the 1000 endodontically failed teeth analyzed in this study, 28.1% (n = 281) were extracted, 66% (n = 660) were re-treated, and 5.9% (n = 59)
were treated with apical surgery. Among the reasons for failure,
restorative and endodontic reasons were seen most frequently (43.9%, n = 439), whereas orthodontic reasons were seldom seen (0.1%, n = 1).
The most common reason for extraction was for prosthetic reasons
(40.8%), and perforation/stripping was the least common (2.9%). The
mandibular first molars were the most frequently extracted teeth (27.4%,
n = 77).
Conclusions
The
most common reason for the extraction of endodontically treated teeth
was for prosthetic reasons. Among the reasons for failure, restorative
and endodontic reasons were the most frequently seen, and orthodontic
reasons were the most seldom. The teeth that failed most frequently were
mandibular first molars, and the teeth that failed least frequently
were maxillary third molars. The most common reason for the extraction
of failed endodontically treated teeth was for prosthetic reasons.
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