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

在过去几年的观察期内，作者经历了由铸造陶瓷材料（OCC）制成的磨牙牙列的断裂病例，该材料被认为是最坚固的陶瓷材料。将该复合材料作为复合树脂贴面修复体的贴面剂应用于颊面和部分咬合面。该系统需要树脂或陶瓷材料与钛或时效硬化金合金之间的结合。因此，适当的粘接系统的单板子结构组合，确定使用金属和陶瓷底漆。结果已发表在研究报告中，咬合力的分布是通过一个咬合力测定系统（Occluzer）进行评估。结果表明，咬合力的分布在基线和六个月后没有显着差异。复合材料应用于咬合面的一部分没有产生任何问题。需要进一步观察以预测临床成功率。通过使用复制模型进行的体内咬合磨损的扫描电子显微镜观察也未显示出两个观察期之间的明显差异，除了检测到树脂部分的轻微磨损。在实验结束时，对仪器的计算机软件进行了几项改进。这些版本的升级使得能够计算粘合面积以及在原位显示结果。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。作者正在继续观察这种咬合关系，并将进一步证实这种咬合关系是所谓的平衡磨损或等咬合力分布的咬合关系。

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.