{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T11:54:21Z","timestamp":1772366061810,"version":"3.50.1"},"reference-count":37,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2017,5,1]],"date-time":"2017-05-01T00:00:00Z","timestamp":1493596800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81530050"],"award-info":[{"award-number":["81530050"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81500853"],"award-info":[{"award-number":["81500853"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81471791"],"award-info":[{"award-number":["81471791"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2017,5]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> Although removal of impacted third molars (I\u2010M3s) is common in dental clinics, the decision to retain or remove asymptomatic non\u2010impacted third molars (N\u2010M3s) presents a significant challenge. This study investigates influence of N\u2010M3s on pathologies of adjacent second molars (A\u2010M2s).<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Clinical status of M3s was evaluated, and presence of distal caries, external root resorption (ERR), and alveolar bone loss (ABL) of A\u2010M2s was assessed by orthopantomograms (OPGs). Prevalence of A\u2010M2 pathologies was evaluated and association between N\u2010M3s and pathologies of A\u2010M2s was analyzed by multivariate logistic regression. Significance level was set at 0.05.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> OPGs from 1,958 patients were included in the present study. Among these patients, 45.1% presented with at least one N\u2010M3, and 44.2% of retained M3s were non\u2010impacted. Where N\u2010M3s were present, prevalence of distal caries, ERR, and ABL of A\u2010M2s was 10.0%, 0.8%, and 40.4%, respectively. Although N\u2010M3s did not increase the odds of caries or ERR of A\u2010M2s, presence of N\u2010M3s was associated with 1.77 times higher likelihood of ABL from A\u2010M2s when data were adjusted for age and sex.<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> Presence of N\u2010M3s, even if they are asymptomatic, represents an important risk factor for periodontal health of A\u2010M2s. This finding should be considered during clinical decision making regarding retention or extraction of N\u2010M3s, especially when these teeth are non\u2010functional or when their removal will not affect overall occlusal function.<\/jats:p>","DOI":"10.1902\/jop.2016.160453","type":"journal-article","created":{"date-parts":[[2016,12,15]],"date-time":"2016-12-15T08:22:10Z","timestamp":1481790130000},"page":"450-456","source":"Crossref","is-referenced-by-count":32,"title":["Influence of Non\u2010Impacted Third Molars on Pathologies of Adjacent Second Molars: A Retrospective 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