title: A longitudinal study of tooth wear in orthodontically treated patients.
abstract: The primary objective of this study was to determine whether there is a relationship between incisal/occlusal tooth wear during the mixed dentition and subsequent wear of the adult dentition. Pretreatment orthodontic records taken during the mixed dentition (T1), as well as follow-up records taken an average of 20 years later (T2), were available for 223 orthodontically treated patients. Incisal/occlusal tooth wear was measured on a tooth-by-tooth basis from T1 and T2 stone casts with a four-category scoring system. Multiple regression analysis (R2 = 0.33) indicated that wear could be predicted at a given age during adulthood from wear observed on the deciduous mandibular canines and molars at T1 (p < 0.0001). This predictive relationship was modified by the age at which the T1 wear was observed (p = 0.029) and possibly by the sex of the patient (p = 0.10). These results indicate that adult tooth wear is not independent of the tooth wear that occurred as a child. Bruxism is suggested as a possible common etiologic mechanism that may account for the relationship between childhood and adult tooth wear.
authors.affiliation: Department of Orthodontics, University of Washington, Seattle 98195-7446, USA. ramsay@u.washington.edu
authors.forename: D J
authors.initials: DJ
authors.lastname: Knight
authors.forename: B G
authors.initials: BG
authors.lastname: Leroux
authors.forename: C
authors.initials: C
authors.lastname: Zhu
authors.forename: J
authors.initials: J
authors.lastname: Almond
authors.forename: D S
authors.initials: DS
authors.lastname: Ramsay
mesh_terms: D000293:Adolescent; D000328:Adult; D002012:Bruxism / Q000150:complications; D002648:Child; D003818:Dentition, Mixed; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D003765:Models, Dental; D015588:Observer Variation; D009971:Orthodontics, Corrective; D011897:Random Allocation; D012044:Regression Analysis; D014072:Tooth Abrasion / Q000453:epidemiology* / Q000209:etiology; D014861:Washington / Q000453:epidemiology