title: [Application of saucer shaped cavity and retentive groves in class II cavity restoration].
abstract: OBJECTIVE
  To observe the clinical effects of class II cavity restoration by using saucer shaped cavity and retentive grooves and dovetail retentive cavity.
  
  
  METHODS
  550 cases needing to have class II cavity preparations were divided into two groups randomly to have class II cavity restoration by using saucer shaped cavity and retentive groups or dovetail retentive cavity. The same light cured posterior composite resin restorative material was used 2 groups. After two years of follow-up, The clinical effects were recorded and evaluated.
  
  
  RESULTS
  There was no significant difference in two groups (P>0.05) in respects to loss of retention, margin sealing, Secondary caries, grooves occlusal abrasion, pulp reaction and margin coloration.
  
  
  CONCLUSIONS
  Using saucer shaped cavity and retentive grooves had the similar effect to dovetail retentive cavity.
authors.affiliation: Suzhou Stomatological Hospital. Suzhou 215005, Jiangsu Province, China. wdm99@sohu.com
authors.forename: Hong-Hai
authors.initials: HH
authors.lastname: Liu
mesh_terms: D003731:Dental Caries / Q000628:therapy*; D003737:Dental Cavity Preparation / Q000379:methods*; D003793:Dental Restoration, Permanent; D005260:Female; D006801:Humans; D008297:Male