title: Direct anterior composite veneers in vital and non-vital teeth: a retrospective clinical evaluation.
abstract: OBJECTIVE
  This retrospective, longitudinal clinical study investigated the performance of direct veneers using different composites (microfilled×universal) in vital or non-vital anterior teeth.
  
  
  METHODS
  Records from 86 patients were retrieved from a Dental School clinic, comprising 196 direct veneers to be evaluated. The FDI criteria were used to assess the clinical evaluation. The survival analysis was done using Kaplan-Meier method and Log-Rank test. The multivariate Cox regression with shared frailty was used to investigate the factors associated with failure.
  
  
  RESULTS
  A total of 196 veneers were evaluated, with 39 failures. The mean time of service for the veneers was 3.5 years, with a general survival rate of 80.1%. In the qualitative evaluation of the restorations, microfilled composite showed slighty better esthetics. The annual failure rates (AFR) were 4.9% for veneers in vital teeth and 9.8% for non-vital teeth with statistical significance (p=0.009). For microfilled and universal veneers the respective AFRs were 6.0% and 6.2% (p>0.05). Veneers made in non-vital teeth had a higher risk of failure over time compared to those made in vital teeth (HR 2.78; 95% CI 1.02-7.56), but the type of material was not a significant factor (p=0.991). The main reason for failure was fracture of the veneer.
  
  
  CONCLUSIONS
  Direct composite veneers showed a satisfactory clinical performance. Veneers performed in vital teeth showed a better performance than those placed in non-vital teeth. No difference in the survival rate for different composites was found, although microfilled composites showed a slightly better esthetic appearance.
  
  
  CONCLUSIONS
  Direct composite veneers show good results in esthetic dentistry nowadays. Composite veneers in vital teeth have a lower risk of failure than those in non-vital teeth.
authors: Department of Conservative Dentistry, Federal University of Rio Grande do Sul, RS, Brazil.
authors: Fábio Herrmann
authors: FH
authors: Coelho-de-Souza
authors: Private Practitioner, Porto Alegre, RS, Brazil.
authors: Daiana Silveira
authors: DS
authors: Gonçalves
authors: Private Practitioner, Porto Alegre, RS, Brazil.
authors: Michele Peres
authors: MP
authors: Sales
authors: Department of Conservative Dentistry, Federal University of Rio Grande do Sul, RS, Brazil.
authors: Maria Carolina Guilherme
authors: MC
authors: Erhardt
authors: Post-Graduate Program in Dentistry, Federal University of Pelotas, RS, Brazil.
authors: Marcos Britto
authors: MB
authors: Corrêa
authors: Department of Restorative and Preventive Dentistry, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.
authors: Niek J M
authors: NJ
authors: Opdam
authors: Post-Graduate Program in Dentistry, Federal University of Pelotas, RS, Brazil. Electronic address: ffdemarco@gmail.com.
authors: Flávio Fernando
authors: FF
authors: Demarco
mesh_terms: D000328:Adult; D019232:Dental Restoration Failure / Q000706:statistics & numerical data*; D058250:Dental Restoration Repair / Q000009:adverse effects*; D003801:Dental Veneers / Q000009:adverse effects* / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
keywords: Anterior Restorations; Anterior restorations; Clinical trial; Dental Veneers; Dental veneers; Longevity; Non-vital teeth