title: One year clinical evaluation of two different types of composite resins in posterior teeth.
abstract: OBJECTIVE
  The aim of this study was to assess the clinical performance of two adhesive restorative systems (Single Bond/Filtek P-60 and Single Bond/Filtek Z-250) in posterior teeth using a modified United States Public Health Service (USPHS) system.
  
  
  METHODS
  A total of 70 restorations were placed in molars and premolars in 30 patients (14 females and 16 males; 18-40 years) by one operator. All restorations were directly evaluated by two examiners at baseline, six months, and 12 months using the following modified USPHS rating criteria: marginal integrity, marginal discoloration, surface texture, contour, postoperative sensitivity, and recurrent caries.
  
  
  RESULTS
  At six and 12 months all restorations were available for evaluation of marginal discoloration, surface texture, contour, postoperative sensitivity, and recurrent caries that remained with 100% Alpha-ratings at recalls for both restorative systems. Marginal integrity for P-60 was scored as 94.3% and 91.4% Alpha at six and 12 months, respectively, and rates for Z-250 were 100% and 97.1% Alpha at six and 12 months, respectively. Statistical analysis was completed with Fisher's exact and McNemar Chi-square tests at a significance level of 5% (P<0.05).
  
  
  CONCLUSIONS
  All restorations were clinically satisfactory and no significant differences were found among them.
  
  
  CONCLUSIONS
  Posterior resin composite restorations placed under appropriate conditions provide a satisfactory clinical performance.
authors.affiliation: Department of Operative Dentistry at the Federal University of Espírito Santo in Espírito Santo, Brazil.
authors.forename: Ranulfo
authors.initials: R
authors.lastname: Gianordoli Neto
authors.forename: Sérgio Lima
authors.initials: SL
authors.lastname: Santiago
authors.forename: Juliano Sartori
authors.initials: JS
authors.lastname: Mendonça
authors.forename: Vanara Florêncio
authors.initials: VF
authors.lastname: Passos
authors.forename: José Roberto Pereira
authors.initials: JR
authors.lastname: Lauris
authors.forename: Maria Fidela de Lima
authors.initials: MF
authors.lastname: Navarro
mesh_terms: D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000473:pathology; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000209:etiology; D003737:Dental Cavity Preparation / Q000379:methods; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D003807:Dentin Sensitivity / Q000209:etiology; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008963:Molar / Q000473:pathology; D012008:Recurrence; D016037:Single-Blind Method; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C438835:Filtek P60 Composite Resin; C444701:Filtek Z250; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate