Operative Dentistry Department, Dental Faculty, Shiraz University of Medical Sciences, Shiraz, Iran.
Oper Dent. 2010 Nov-Dec;35(6):599-604. doi: 10.2341/10-064-C.
This clinical study evaluated the clinical performance of cuspal coverage with combined composite-amalgam restorations in endodontically-treated maxillary premolars over a three-year period. Thirty-six maxillary premolars, each with a Class II cavity in 36 patients ranging in age between 28 and 52 years, were selected after endodontic treatment. After reduction of the buccal and palatal cusps, internal coverage and veneering of the reduced buccal cusp was performed with composite. The remaining cavity and reduced palatal cusp were restored with high-copper amalgam. The restorations were evaluated at baseline and in one-, two- and three-year recalls with USPHS criteria. Changes in characteristics of the restorations were analyzed with the Cochran Q-test at a significance level of p < 0.05. Most of the restorations received an overall score of alpha, except two restorations, which showed a slight discrepancy at the composite-amalgam interface after one year (p > 0.05). Four restorations exhibited slight discoloration of the composite veneering after three years (p < 0.05). No restoration exhibited fracture after three years. It was concluded that combined composite-amalgam cusp coverage of endodontically-treated maxillary premolars showed acceptable clinical performance after three years.
本临床研究评估了在三年内用复合树脂-银汞合金联合修复体覆盖牙尖的临床性能在上颌前磨牙的应用。36 名年龄在 28 至 52 岁之间的患者的 36 颗上颌前磨牙在根管治疗后选择。颊尖和腭尖降低后，用复合树脂对内层覆盖和颊尖修形进行贴面修复。剩余的牙体和降低的腭尖用高铜银汞合金修复。修复体在基线和 1 年、2 年和 3 年随访时用 USPHS 标准进行评估。在显著性水平 p<0.05 下，用 Cochran Q 检验分析修复体特征的变化。大多数修复体的总体评分均为 alpha，只有两个修复体在一年后显示出复合-银汞合金界面有轻微差异（p>0.05）。三年后有四个修复体的复合贴面有轻微变色（p<0.05）。三年后没有修复体出现折断。结论：经过三年的时间，用复合树脂-银汞合金联合修复体覆盖根管治疗后的上颌前磨牙牙尖，具有可接受的临床性能。
