Naomi Tanoue, DDS, PhD,(a) Takako Ide, DDS, PhD,(b) Koji Kawasaki, DDS, PhD,(c) Kiyoshi Nagano, DT, PhD,(d) and Takuo Tanaka, DDS, PhD(e)
(a)Department of Specialized Dentistry, Nagasaki University Hospital of Medicine and Dentistry, (b)Division of Fixed Prosthodontics and Oral Rehabilitation, Nagasaki University Graduate School of Biomedical Sciences, (c)Community Medical Network Center, Nagasaki University Hospital of Medicine and Dentistry, (d)Dental Laboratory Center, Nagasaki University Hospital of Medicine and Dentistry, Nagasaki, and (e)Department of Oral and Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
Purpose: The purpose of this study was to evaluate the clinical performance of resin-bonded fixed partial dentures (RBFPDs) made from a silver-palladium-copper-gold alloy.
Materials and Methods: The retention of 81 RBFPDs inserted during the 1987 to 2002 using a thione primer as the metal conditioner (Metaltite or V-Primer) and an adhesive resin (Super-Bond C&B) was clinically evaluated. Two levels of survival were defined: (1) complete survival (no debonding) and (2) functional survival (including loss of retention on one occasion with rebonding of the original RBFPD). All data were obtained from clinical examinations, and missing data were censored at the date of the last available information. Mean survival periods were determined using the Kaplan-Meier procedure.
Results: Of the 81 RBFPDs, five restorations failed, one of which could be rebonded. The observation duration and corresponding survival ratio for complete survival were 165 months and 43.9%, and those for functional survival were 178 months and 87.7%, respectively.
Conclusion: The results indicate that Super-Bond resin combined with noble metal conditioners is a clinically reliable system for longevity of RBFPDs. (Int Chin J Dent 2006; 6: 53-59.)
Key Words: clinical evaluation, primer, resin-bonded fixed partial denture, thione.