title: Effects of the removal of composite resin restorations on Class II cavities.
abstract: Composite resin has such good aesthetic qualities that it is often difficult to identify the tooth-restoration interface, yet this is particularly important should the material require complete removal. Following the in-vitro removal of direct and indirect composite resin restorations from Class II cavities significant changes in cavity size and shape were recorded. Thirty-eight cavities were studied from both occlusal and proximal aspects and the final cavity size was compared to the original cavity. There was a significant increase in cavity size with a mean increase of 37% for the direct composite cavities and 35% for the indirect cavities, although the range of values is large. Following restoration removal, occlusal surfaces were seen to increase in 71% of teeth and proximal surfaces in 75% of teeth. There was no significant difference between the results for direct and indirect composite restorations. Occlusal dovetails and cavity undercuts were created in cavities which did not contain these features initially.
authors.affiliation: Department of Conservative Dentistry, King's College School of Medicine and Dentistry, Denmark Hill, London.
authors.forename: B J
authors.initials: BJ
authors.lastname: Millar
authors.forename: P B
authors.initials: PB
authors.lastname: Robinson
authors.forename: B R
authors.initials: BR
authors.lastname: Davies
mesh_terms: D003188:Composite Resins; D003737:Dental Cavity Preparation; D017005:Dental Debonding / Q000009:adverse effects*; D006801:Humans; D007284:Inlays; D012086:Reoperation
chemical_list: D003188:Composite Resins