title: Patient risk factors' influence on survival of posterior composites.
abstract: This practice-based retrospective study evaluated the survival of resin composite restorations in posterior teeth, focusing on the influence of potential patient risk factors. In total, 306 posterior composite restorations placed in 44 adult patients were investigated after 10 to 18 yrs. The history of each restoration was extracted from the dental records, and a clinical evaluation was performed with those still in situ. The patient risk status was assessed for caries and "occlusal-stress" (bruxism-related). Statistical analysis was performed by the Kaplan-Meier method and Cox-regression multivariate analysis. In total, 30% of the restorations failed, of which 82% were found in patients with 1 or 2 risk factors. Secondary caries was the main reason of failure within caries-risk patients, whereas fracture was the main reason in "occlusal-stress-risk" patients. The patient variables gender and age did not significantly affect survival, but risk did (p < .001). Tooth type (p < .001), arch (p = .013), and pulpal vitality (p = .003) significantly affected restoration survival. Within the limits of this retrospective evaluation, the survival of restorations is affected by patient risk factors, which should be included in survival analyses of restorations.
authors.affiliation: Federal University of Pelotas, School of Dentistry, Gonçalves Chaves, 457, Pelotas, 96015560, Brazil. fvandesande@gmail.com
authors.forename: F H
authors.initials: FH
authors.lastname: van de Sande
authors.forename: N J
authors.initials: NJ
authors.lastname: Opdam
authors.forename: P A Da Rosa
authors.initials: PA
authors.lastname: Rodolpho
authors.forename: M B
authors.initials: MB
authors.lastname: Correa
authors.forename: F F
authors.initials: FF
authors.lastname: Demarco
authors.forename: M S
authors.initials: MS
authors.lastname: Cenci
mesh_terms: D000328:Adult; D000368:Aged; D002012:Bruxism / Q000150:complications; D002126:Calcium Hydroxide / Q000627:therapeutic use; D003188:Composite Resins / Q000737:chemistry*; D003724:Dental Arch / Q000473:pathology; D003733:Dental Caries Susceptibility / Q000502:physiology; D003736:Dental Cavity Lining / Q000706:statistics & numerical data; D003764:Dental Materials / Q000737:chemistry*; D003769:Dental Occlusion, Traumatic / Q000150:complications; D003782:Dental Pulp / Q000473:pathology; D019232:Dental Restoration Failure / Q000706:statistics & numerical data*; D003793:Dental Restoration, Permanent / Q000706:statistics & numerical data*; D004311:Double-Blind Method; D005260:Female; D005500:Follow-Up Studies; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D019279:Resin Cements / Q000737:chemistry; D012189:Retrospective Studies; D012307:Risk Factors; D016019:Survival Analysis; D014070:Tooth / Q000473:pathology; D055815:Young Adult
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; D019279:Resin Cements; D002126:Calcium Hydroxide
keywords: bruxism; dental restoration failure; permanent dental restoration; permanent dentition; retrospective study; risk assessment