Department of Prosthetic Dentistry, Federal University of EspÃ-rito Santo, Vitória, ES, Brazil.
J Appl Oral Sci. 2012 May-Jun;20(3):323-8. doi: 10.1590/s1678-77572012000300005.
This study evaluated the 56-month clinical performance of Class I and II resin composite restorations. Filtek P60 was compared with Filtek Z250, which are both indicated for posterior restorations but differ in terms of handling characteristics. The null hypothesis tested was that there is no difference in the clinical performance of the two resin composites in posterior teeth.
Thirty-three patients were treated by the same operator, who prepared 48 Class I and 42 Class II cavities, which were restored with Single Bond/Filtek Z250 or Single Bond/Filtek P60 restorative systems. Restorations were evaluated by two independent examiners at baseline and after 56 months, using the modified USPHS criteria. Data were analyzed statistically using Chi-square and Fisher's Exact tests (a=0.05).
After 56 months, 25 patients (31 Class I and 36 Class II) were analyzed. A 3% failure rate occurred due to secondary caries and excessive loss of anatomic form for P60. For both restorative systems, there were no significant differences in secondary caries and postoperative sensitivity. However, significant changes were observed with respect to anatomic form, marginal discoloration, and marginal adaptation. Significant decreases in surface texture were observed exclusively for the Z250 restorations.
Both restorative systems can be used for posterior restorations and can be expected to perform well in the oral environment.
本研究评估了 I 类和 II 类树脂复合材料修复体在 56 个月的临床性能。Filtek P60 与 Filtek Z250 进行了比较，两者均适用于后牙修复，但在操作特性方面有所不同。测试的零假设是，两种在后牙中使用的树脂复合材料的临床性能没有差异。
同一位操作者治疗了 33 名患者，共制备了 48 个 I 类和 42 个 II 类窝洞，并用单键/Filtek Z250 或单键/Filtek P60 修复系统进行修复。在基线和 56 个月后，由两名独立的检查者使用改良的 USPHS 标准进行评估。使用卡方和 Fisher 精确检验（α=0.05）进行统计数据分析。
56 个月后，对 25 名患者（31 个 I 类和 36 个 II 类）进行了分析。由于继发龋和 P60 解剖形态过度丧失，导致 3%的修复体失败。对于两种修复系统，继发龋和术后敏感均无显著差异。然而，在解剖形态、边缘变色和边缘适应性方面观察到了显著的变化。仅在 Z250 修复体中观察到表面质地显著下降。
两种修复系统均可用于后牙修复，预计在口腔环境中能表现良好。
