Evaluation of the mechanical and physical properties of a posterior resin composite in posterior adult teeth

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

Evaluation of post-operative sensitivity and secondary caries in posterior composite restorations: a 12month study

Objective: To evaluate post-operative sensitivity and secondary caries associated with posterior composite restoration. Materials and Methods: The study involved restoration of occlusal and proximo-occlusal caries on premolars and molars of 62 patients seen at the out-patient clinic of the restorative department of the Lagos University Teaching Hospital. The restorations were completed with a micro-hybrid light curing resin composite (Unolux BCS; UnoDent; England). Following total etch procedure and use of a type 2 (5th generation/one-bottle) adhesive. The USPHSC or modified Ryge criteria was employed for direct evaluation of the restorations over the 12 month period. Results: Post-operative sensitivity was 3.5Bravo at baseline and 1.7Bravo at 12 months. No significant change in result was recorded for post-operative sensitivity at the end of the evaluation period. 100was recorded for the absence of secondary caries throughout the evaluation period up till the 6 th month when a failed restoration scored 1.7Bravo. At 12 months Alpha scores for secondary caries was 98.3. Conclusion: Post-operative sensitivity was kept to a minimum and there were no occurrences of secondary caries

Coronal tissue loss of endodontically treated permanent teeth of patients seen in a Nigerian Teaching Hospital

Objectives: The study was done to determine the extent of coronal tissue loss of endodontically treated teeth. Results: 176 teeth of 168 patients that completed endodontic treatment to obturation stage were evaluated for coronal tissue loss. The teeth included fifty-five anterior teeth (31.3); seventy-three premolars (41.5) and forty-eight molars (27.3). Majority (43.2) of the root filled teeth evaluated for coronal damage had minimal coronal tissue damage; followed by teeth with significant tissue damage (33.5); and lastly; teeth with moderate tissue damage (23.3).Conclusions: The result of this study revealed that most endodontically treated teeth had minimal coronal tissue loss and therefore can be managed with conservative restorative treatment options