title: Evaluation of the mechanical and physical properties of a posterior resin composite in posterior adult teeth.
abstract: OBJECTIVE
  To evaluate the mechanical and physical properties of a micro-hybrid resin composite used in adult posterior restorations.
  
  
  METHODS
  A micro-hybrid, light curing resin composite Unolux BCS Composite Restorative, (UnoDent, England) was used to restore 74 carious classes I and II cavities on posterior teeth of 62 adult patients. The restorations were evaluated immediately following placement (Baseline), at 1 week, 3months, 6months and 12months using the United States Public Health Service Criteria/Modified Ryge criteria for direct evaluation. Color matching, marginal stains and adaptation, wear and surface texture were evaluated. Ranging from best to the worst, the ratings were, Alfa, Bravo and Charlie.
  
  
  RESULTS
  58 restorations were available for review at the 12 th month evaluation, 15 patients bearing 21.6% of the restorations were lost to recall. Colour match scores were 89.6% Alpha at baseline and 74.1% at 12-month review. Marginal staining were 100% Alpha at baseline and 98.3% Alpha at the end of the evaluation period. Marginal adaptation at baseline was 100% Alpha this value dropped to 94.8% by the 12th month. Anatomical wear scores were 100% Alpha at baseline and scores dropped to 93.1 % at the 12-month evaluation. At baseline, Alpha scores for Surface texture were 100%. A drop in Alpha scores to 93.1 % at the first week review was maintained till the 12 month.
  
  
  CONCLUSIONS
  Carefully controlled placement of micro-hybrid resin composite using the total etch and type 2 (one-bottle) adhesive can produce satisfactory posterior restorations on permanent teeth.
authors.affiliation: Department of Restorative Dentistry, College of Medicine of the University of Lagos, Idi-araba, Nigeria.
authors.forename: L O
authors.initials: LO
authors.lastname: Agbaje
authors.forename: O P
authors.initials: OP
authors.lastname: Shaba
authors.forename: I C
authors.initials: IC
authors.lastname: Adegbulugbe
mesh_terms: D000134:Acid Etching, Dental; D000328:Adult; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000209:etiology; D018772:Dental Marginal Adaptation; D019232:Dental Restoration Failure; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent / Q000145:classification* / Q000379:methods; D017220:Dentin-Bonding Agents; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D009549:Nigeria; D017678:Sex Distribution; D016896:Treatment Outcome
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents