One year clinical follow up of nano filled glass ionomer and composite resin restorations

Background: The authors evaluated the clinical performance of a nano filled glass ionomer restorative material (Ketac N100) and a nano filled composite resin restorations (Grandio SO) with its adhesive (Futurabond DC) in Class V carious lesions over one year. Methods: Thirty patients received sixty different restorations. The distributions of materials and the teeth locations were randomized. Class V cavity was prepared according to caries extension. For cavities to be restored with composite a 1 mm bevel was placed on the enamel margin to increase the surface area for bonding. adhesives were used following the manufacturer s instructions. Grandio SO with its adhesive and Ketac N100 restorative materials were applied following manufacturer s instructions. Finishing and polishing was performed using finishing burs and polishing discs. Each restoration was clinically evaluated at base line (24 h), 6 months and after one year using USPHS criteria. Results: The recall rate was (81.7%) after 1 year. Survival rate for Grandio SO restorations were (85.185%) while for Ketac N100, it was (100%) after one year of clinical service. Using Friedman test, a significant difference was recorded between the tested materials when the effect of time was tested on restoration fracture, color match, anatomic form, marginal adaptation and recurrence of caries. Using Fischer s exact test, a significant difference was recorded between tested groups regarding restoration fracture, color match. Anatomic form, recurrence of caries, marginal discoloration and postoperative hypersensitivity. Conclusion: Most of the restorations maintained good quality during the observation period, which was considered a short evaluation time. Clinical implications: Grandio SO and Ketac N100 achieved clinically acceptable results after one year of service. So both materials may be used with confidence in Class V carious lesions. A longer evaluation period may be recommended to decide the use of restorative material safely in Class V cavities.