Method: 491 routine patients at UICOD who had anterior composite restorations placed between 1995 and 1997 and had subsequent treatment of the initial composite restoration where included in the study. Patient and restoration information included: patient ID, date of birth, gender, tooth number, date of initial restoration placement, surfaces involved in initial restoration, type of provider who placed the initial restoration (faculty, resident, dental student), date of subsequent treatment, type of subsequent treatment. Data was collected from the date of initial restoration placement (1995-1997) through 2012. Survival rate of a restoration was defined as how long a restoration lasted from the day of placement until the day of subsequent treatment. Subsequent treatment included: restorations (composite, amalgam, or glass ionomer), veneer and/or crowns, root canal therapy (RCT), and extraction. One tooth per subject was used for the data analyses.
Result: Of the 491 subjects (mean age at baseline=56.2±13.5 years, and 58.5% female), 214 (43.6%) had restorations on the central incisors, 142 (28.9%) on the lateral incisors, and 135 (27.5%) on the canines. Subsequent treatment included: 8 (1.6%) amalgams, 395 (80.5%) composites, 27 (5.5%) glass ionomers, 24 (4.9%) crowns, 26 (5.3%) with RCT, 3 (0.6%) crown lengthening gingivectomy, and 8 (1.6%) with extraction. Moreover, 264 (53.8%) restorations were done by pre-doctoral dental students, 186 (37.9%) by faculty members, and 41 (8.3%) by residents. The median survival rate for anterior composite restorations was 5.8 years.
Conclusion: A comprehensive review of patient record data can provide valuable information regarding the long term clinical performance of restorations. Based on the findings of preliminary results, further analysis is continuing.