ABSTRACT
Objective: To evaluate the mechanical and physical properties of a micro-hybrid resin composite used in adult posterior restorations Materials and 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 21.6of the restorations were lost to recall. Colour match scores were 89.6Alpha at baseline and 74.1at 12-month review. Marginal staining were 100Alpha at baseline and 98.3Alpha at the end of the evaluation period. Marginal adaptation at baseline was 100Alpha this value dropped to 94.8by the 12th month. Anatomical wear scores were 100Alpha at baseline and scores dropped to 93.1at the 12-month evaluation. At baseline; Alpha scores for Surface texture were 100. A drop in Alpha scores to 93.1at the first week review was maintained till the 12 month. Conclusion: 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