Veterans Administration Cooperative Studies Project No. 147. Part VIII: Plaque accumulation on metal ceramic restorations cast from noble and nickel-based alloys. A five-year report.
In 1980, the Veterans Administration Cooperative Studies Program No. 147 initiated a multicentered, multidisciplinary clinical study to evaluate the use of alternative alloys for porcelain-fused-to-metal restorations. This segment of the study compares the accumulation of dental plaque, over time, on restorations made from either Olympia or one of several alternative alloys, including W-1, Ceramalloy II, Micro-Bond N/P2, or Ticon in comparison to: (1) an unrestored tooth, which served as the periodontal control, (2) Olympia, the alloy control, and (3) among the alternative alloys. The restoration of approximately 800 teeth with fixed partial dentures/crowns was not found to contribute to plaque accumulation when measured by using the Löe and Silness plaque index. Statistically, more plaque was exhibited by the unrestored periodontal control tooth than by any of the restored teeth. No differences in plaque accumulation were observed between Olympia and the alternative alloys or among the alternative alloys themselves after 36 months of clinical use.
Morris
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HF
Clinical Research Center for Restorative Materials, Veterans Administration Medical Center, Ann Arbor, Mich.
D002986:Clinical Trials as Topic; D003442:Crowns / Q000009:adverse effects; D003722:Dental Alloys; D003773:Dental Plaque / Q000209:etiology*; D003774:Dental Plaque Index; D003776:Dental Porcelain; D003830:Denture, Partial, Fixed / Q000009:adverse effects; D006047:Gold Alloys; D006801:Humans; D009532:Nickel; D010512:Periodontal Index; D014481:United States; D014493:United States Department of Veterans Affairs
D003722:Dental Alloys; D006047:Gold Alloys; D003776:Dental Porcelain; D009532:Nickel