Wang Nianbin, Chen Xinmin, He Tao, Yang Yan, Zhang Guiju, Wu Xiaohong, Li Pingping, Niu Lin
Chongqing Beibei TCM Hospital, Chongqing 400700, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2007 Feb;24(1):133-5.
To study the effects of different post design on retention. 27 simulated tooth roots made of PMMA were divided into three groups, then manufactured the cement-expanded composite screw post-core system (CECSP), cement screw post-core system (CSP) and cast metal post-core system (CMP). The root and post-core system was tensiled by the speed of 10 mm/min on the Instron 4302 and recorded the retention force. It appeared significantly different between retention force of CECSP and CSP and CAM (P < 0.05). As a result, the retention mechanical properties of CECSP was much better than those of cement screw post-core system and cast metal post-core system. Therefore, it is possible to find a new way for restoration of endodontically treated teeth.
为研究不同桩核设计对固位力的影响。将27个由聚甲基丙烯酸甲酯制成的模拟牙根分为三组，然后制作水泥膨胀复合螺纹桩核系统（CECSP）、水泥螺纹桩核系统（CSP）和铸造金属桩核系统（CMP）。在Instron 4302上以10mm/min的速度对牙根和桩核系统进行拉伸，并记录固位力。CECSP与CSP和铸造金属桩核（CAM）的固位力之间存在显著差异（P<0.05）。结果表明，CECSP的固位力学性能明显优于水泥螺纹桩核系统和铸造金属桩核系统。因此，有可能为根管治疗后的牙齿修复找到一种新方法。
