Clinical studies of the attrition in a new ceramic-resin composite for a fixed prosthesis

在过去几年的观察期间，作者经历了由浇注陶瓷材料（OCC）制成的磨牙修复体断裂的病例，这被认为是最强的陶瓷材料。因此，新的复合材料作为复合树脂贴面修复体的贴面剂应用于口腔和部分咬合表面。该系统需要树脂或陶瓷材料与钛或可时效硬化金合金之间的粘合。因此，使用金属和陶瓷底漆确定了贴面-子结构组合的适当粘合系统。研究结果已经发表在研究报告中。用咬合力测定系统（Occluzer）测定牙合力的分布。结果表明，6个月后与基线间的咬合力分布无明显差异。复合材料应用于咬合表面的一部分没有产生任何问题。进一步的观察对于预测临床成功率是必要的。通过复制铸型在体咬合磨损的扫描电镜观察，除了检测到树脂部分的轻微磨损外，两个观察期之间也没有明显的差异。实验结束时，对仪器的计算机软件进行了若干改进。这些版本支持计算保税区，并在现场显示结果。与传统系统相比，该系统能够在更短的时间内分析大量病例的数据。作者正在对修复体进行连续观察，即将到来的结果可能表明，我们的系统所做的修复体被证明是所谓的平衡磨损或等咬合力分布系统。

During an observation period of the last several years, the authors have experienced fractured cases of molar restorations made of a castable ceramic material (OCC), which is trusted to be the strongest ceramic material. The new composite material therefore was applied to a buccal and a part of occlusal surfaces as a veneering agent of composite resin veneered restorations. This system requires bonding between resin or ceramic material and titanium or age-hardenable gold alloy. Hence appropriate bonding systems for the veneer-substructure combinations were ascertained using metal and ceramic primers. The results have alreaby been published in the research reports.The distribution of occlusal forces were evaluated by means of a occlusal force determination system (Occluzer). The results indicate that there was no significant difference in distribution of occlusal forces between the base line and after six months. The composite material applied to a part of occlusal surface did not generate any problem. Further observation should be necessary for prediction of rate of clinical success. Scanning electron microscopic observation of in vivo occlusal wear through the use of replicated cast also did not show apparent difference between the two observation periods except for detection of slight wear of the resin portion. By the end of the experimental period, several improvements in computer software of the apparatus were accomplished. These version-ups enabled calculation of bonded area as well as displaying the results in situ. The system is then capable of analyzing data of numerous cases within shorter period of time as compared to the conventional system. The restorations are being continuously observed by the authors and the forthcoming results may indicate that the restorations made of our system are proved to be so called the balanced-worn or the equi-occlusal-force-distributed system.