title: One-year comparison of metallic and translucent matrices in Class II composite resin restorations.
abstract: OBJECTIVE
  To evaluate the clinical performance of composite restorations performed with two matrix and wedge systems.
  
  
  METHODS
  Each of 23 subjects received at least one pair of Class II restorations, one with metallic matrix and wooden wedge and the other with polyester matrix and reflexive wedge. One dentist placed 109 Class II restorations, 51 in premolars and 58 in molars, all in occlusion. Most of the cavities were surrounded by enamel. The restorations were evaluated at baseline, and after 12 months using the modified USPHS criteria. All cavities were restored using Single Bond and P-60, according to the manufacturer's indications. In the metal matrix group, polymerization was performed from occlusal, and in the polyester group, through the reflexive wedge. Statistical analysis was carried out with Chi-square and McNeumar tests.
  
  
  RESULTS
  After 12 months, there was a significant increase in marginal staining, and marginal adaptation was affected by clinical service. There were no differences between matrix and wedge systems, neither considering dental groups nor cavity types.
authors: Graduate Program in Dentistry, Cariology Area, Faculty of Dentistry of Piracicaba, State University of Campinas, SP, Brazil.
authors: Maximiliano Sérgio
authors: MS
authors: Cenci
authors: Flávio Fernando
authors: FF
authors: Demarco
authors: Cecília Luiz
authors: CL
authors: Pereira
authors: Rafael Guerra
authors: RG
authors: Lund
authors: Ricardo Marins
authors: RM
authors: de Carvalho
mesh_terms: D000134:Acid Etching, Dental; D000293:Adolescent; D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry*; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000145:classification* / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008422:Materials Testing; D008434:Matrix Bands; D008875:Middle Aged; D011091:Polyesters / Q000737:chemistry*; D013997:Time Factors; D014934:Wood
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; C438835:Filtek P60 Composite Resin; D011091:Polyesters; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate