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- Title
Influence of Non-Impacted Third Molars on Pathologies of Adjacent Second Molars: A Retrospective Study.
- Authors
Li, Zhi‐Bang; Qu, Hong‐Lei; Zhou, Li‐Na; Tian, Bei‐Min; Chen, Fa‐Ming; Li, Zhi-Bang; Qu, Hong-Lei; Zhou, Li-Na; Tian, Bei-Min; Chen, Fa-Ming
- Abstract
<bold>Background: </bold>Although removal of impacted third molars (I-M3s) is common in dental clinics, the decision to retain or remove asymptomatic non-impacted third molars (N-M3s) presents a significant challenge. This study investigates influence of N-M3s on pathologies of adjacent second molars (A-M2s).<bold>Methods: </bold>Clinical status of M3s was evaluated, and presence of distal caries, external root resorption (ERR), and alveolar bone loss (ABL) of A-M2s was assessed by orthopantomograms (OPGs). Prevalence of A-M2 pathologies was evaluated and association between N-M3s and pathologies of A-M2s was analyzed by multivariate logistic regression. Significance level was set at 0.05.<bold>Results: </bold>OPGs from 1,958 patients were included in the present study. Among these patients, 45.1% presented with at least one N-M3, and 44.2% of retained M3s were non-impacted. Where N-M3s were present, prevalence of distal caries, ERR, and ABL of A-M2s was 10.0%, 0.8%, and 40.4%, respectively. Although N-M3s did not increase the odds of caries or ERR of A-M2s, presence of N-M3s was associated with 1.77 times higher likelihood of ABL from A-M2s when data were adjusted for age and sex.<bold>Conclusions: </bold>Presence of N-M3s, even if they are asymptomatic, represents an important risk factor for periodontal health of A-M2s. This finding should be considered during clinical decision making regarding retention or extraction of N-M3s, especially when these teeth are non-functional or when their removal will not affect overall occlusal function.
- Subjects
THIRD molars; PERIODONTICS; IMPACTION of teeth; DENTAL caries; ROOT resorption (Teeth); ALVEOLAR process; DISEASES; BONE resorption; MOLARS; PANORAMIC radiography; TOOTH root diseases; LOGISTIC regression analysis; RETROSPECTIVE studies
- Publication
Journal of Periodontology, 2017, Vol 88, Issue 5, p450
- ISSN
0022-3492
- Publication type
Academic Journal
- DOI
10.1902/jop.2016.160453