title: Retention of tooth-colored restorations in non-carious cervical lesions--a systematic review.
abstract: OBJECTIVE
  The aim of this review was to assess the effect of different adhesive systems and tooth preparation on the retention of tooth-colored restorative materials placed in non-carious cervical lesions (NCCLs).
  
  
  METHODS
  Randomized clinical trials with a minimum of 3 years of follow-up that evaluated the effectiveness of tooth-colored materials, adhesive systems, and preparation techniques for the restoration of NCCLs were selected. The Cochrane Central Register of Controlled Trials (CENTRAL), EMBASE (OVID), the Latin American and Caribbean Health Sciences Literature database (LILACS), and Medline (OVID) electronic databases were searched from 1990 to 2013.
  
  
  RESULTS
  Twenty-seven randomized clinical trials were included and reviewed. Meta-analysis was used to determine the relative risk of loss of tooth-colored NCCL restorations between different categories of adhesive systems. The effect of tooth preparation could not be similarly analyzed.
  
  
  CONCLUSIONS
  The current best evidence indicates that a glass ionomer cement has a significantly lower risk of loss of a NCCL restoration compared to either a three-step etch-and-rinse or a two-step etch-and-rinse adhesive system; a three-step etch-and-rinse adhesive system has a significantly lower risk of loss of a NCCL restoration compared to a two-step etch-and-rinse adhesive system. No significant difference could be observed in the risk of loss of a tooth-colored NCCL restoration between a three-step etch-and-rinse adhesive system and either a two-step self-etch or a one-step self-etch adhesive system.
authors.affiliation: Schulich Medicine & Dentistry, Western University, London, ON, Canada, jacinta.santos@schulich.uwo.ca.
authors.forename: Maria Jacinta Moraes Coelho
authors.initials: MJ
authors.lastname: Santos
authors.forename: Nilgun
authors.initials: N
authors.lastname: Ari
authors.forename: Shawn
authors.initials: S
authors.lastname: Steele
authors.forename: John
authors.initials: J
authors.lastname: Costella
authors.forename: David
authors.initials: D
authors.lastname: Banting
mesh_terms: D003116:Color; D003793:Dental Restoration, Permanent; D006801:Humans; D014070:Tooth; D019237:Tooth Cervix / Q000473:pathology*