Geurtsen W, Schoeler U
Department of Conservative Dentistry and Periodontology, Medical University Hannover, Germany.
J Dent. 1997 May-Jul;25(3-4):229-32. doi: 10.1016/s0300-5712(96)00027-9.
The purpose of this study was to determine the longevity and quality of Class I and Class II resin composite (Herculite XR) restorations placed in private practice.
One thousand two hundred and nine Class I and Class II composite restorations with margins in enamel were evaluated clinically after periods of between 12 months and 4.5 years in clinical service by two calibrated examiners using a modified version of established criteria.
Of the restorations investigated 94.8% were rated as 'good' (Alpha 79.3%) or 'clinically acceptable' (Bravo 15.5%). Significantly more restorations in premolar teeth were rated as Alpha (82%) than in permanent molar teeth (77%). The survival rate after 4 years was around 87%. The 50% survival-time, calculated by extrapolation according to Weibull, was approximately 9 years.
It is concluded that the composite investigated is an appropriate material for the restoration of Class I and Class II lesions with margins located in enamel in premolar and permanent molar teeth.
本研究旨在确定在私人诊所中放置的I类和II类树脂复合材料（Herculite XR）修复体的使用寿命和质量。
由两名经过校准的检查人员，使用既定标准的修改版本，对1209个边缘位于牙釉质的I类和II类复合修复体进行临床评估，这些修复体在临床使用12个月至4.5年后进行评估。
在所调查的修复体中，94.8%被评为“良好”（α级79.3%）或“临床可接受”（β级15.5%）。前磨牙的修复体被评为α级（82%）的比例明显高于恒牙磨牙（77%）。4年后的生存率约为87%。根据威布尔分布通过外推法计算的50%生存时间约为9年。
得出的结论是，所研究的复合材料是修复前磨牙和恒牙磨牙中边缘位于牙釉质的I类和II类病变的合适材料。
