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  • Title: Clinical evaluation of polyacid-modified resin composite posterior restorations: one-year results.
    Author: Luo Y, Lo EC, Fang DT, Wei SH.
    Journal: Quintessence Int; 2000 Oct; 31(9):630-6. PubMed ID: 11203987.
    Abstract:
    OBJECTIVE: The aim of this investigation was to evaluate the clinical performance of a new compomer restorative system, Dyract AP, placed in combination with Non-Rinse Conditioner and Prime & Bond NT in permanent posterior teeth. METHOD AND MATERIALS: Fifty Class II and 41 Class I restorations were placed in 39 patients by 1 dentist. The restorations were evaluated directly, with modified US Public Health Service criteria, and indirectly, with color slides and polyvinyl siloxane impressions, at baseline and 6 months and 1 year after placement. Preoperative and 1-year postoperative bitewing radiographs were also taken. RESULTS: All 82 restorations available for 1-year evaluation were in situ. No postoperative sensitivity or pulpal problems were reported. Four Class II restorations (4.9%) failed because of partial fracture or recurrent caries. The percentages of Alfa score for each criterion were color match, 95.1%; marginal discoloration, 57.3%; marginal integrity, 35.4%; anatomic form, 98.8%; and surface texture, 91.5%. The average wear rate of Dyract AP was low (18.5 +/- 11.7 microns at 6 months and 35.7 +/- 13.6 microns at 12 months). CONCLUSION: The excellent handling characteristics, the good clinical performance, and the improved wear resistance suggest that this compomer will provide reliable direct tooth-colored restorations in stress-bearing areas.
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