405 - Longevity of Class II Composite Restorations in Primary First Molars

The purpose of this study is to examine the survival rates of class II composite resin restorations (code D2392) placed in primary first molars by pediatric residents of the Dental College of Georgia at Augusta University between 2009-2019. This retrospective chart review includes all patients between the ages of 2 to 10 years receiving at least one class II composite resin restoration on primary first molars (teeth #s B, I, L, and S) by the Department of Pediatric Dentistry, at the Dental College of Georgia. Statistical analysis will then determine trends in the survivability and longevity of class II resin composite restorations. Retreatment/extraction timelines (when applicable) helped determine a general lifespan for these restorations completed by residents in the Pediatric Dentistry department.


Results: The search query resulted in 556 primary molars treated with a class II resin. 156 patients were excluded to a lack of follow up. 39 (9.75%) teeth were retreated with a stainless steel crown after treatment with a class II composite resin. 18 (4.5%) teeth were later extracted, one which had already been retreated with a SSC.


Conclusions: Of the 400 included restorations in this study, 57 were retreated with either a SSC or extraction, resulting in an 85.75% success rate of class II resin restorations placed in primary first molars by the pediatric department. As the age at time of initial restoration placement increased, the failure rates of the restorations decreased, the lowest failure rate being that of the 8-10 year group. Teeth were retreated with a SSC after an average of 1.86 years. Extractions occurred after an average of 2.81 years post-restoration.