Clinical Evaluation of Dental Restorative Materials.

摘要

This final report represents the results of controlled clinical studies involving 5,727 dental restorations in 1,154 patients which were placed under recorded standardized conditions and were assessed annually for 19 years. The restorations were evaluated by the PHS criteria and reasons for failure were also recorded. The longevity and modes of failure of composite resins, amalgam, base metal, and gold alloys were assessed by use of an Actuarial Life Table Survival Analysis procedure. The median survival time for anterior composites was 13.5 years, as compared to 12.1 years for Class I and 7.1 years for Class II composites. Caries, fracture and wear accounted for 75% of the related reasons for failure of Class II composites. The median survival time for Class I and II amalgams was >19 and 13 years, respectively. There was no difference between the survival function of polished and unpolished alloys, nor was there any difference between high and low copper compositions alloys. Keywords: RA II; Volunteers; Dental materials; Clinical evaluation; Human use; Dental prosthesis; Fillings. (KT)