基牙不同轴面聚合度对GI-Ⅱ全瓷冠抗碎裂载荷影响的研究  

Effect of different convergence angles of abutment axial surface on the fracture resistance of GI-Ⅱ all-ceramic crowns

作　　者：刘利苹[1] 牟月照[1] 

机构地区：[1]山东大学山东省立医院口腔科

出　　处：《口腔颌面修复学杂志》2008年第1期5-8,共4页Chinese Journal of Prosthodontics

基　　金：山东省自然科学基金重点项目(项目编号:Y2002C03)

摘　　要：目的:研究3种不同的牙体轴面聚合度(5°,10°,15°)对GI-Ⅱ全瓷冠抗碎裂载荷的影响,为临床全瓷冠基牙预备找到较合适的轴面控制角度提供参考依据。方法:制备3组离体牙的轴面聚合度分别为5°,10°,15°,在其上制作GI-Ⅱ全瓷冠,固定形成试件后加压直至冠碎裂,采集数据后进行单因素方差分析。结果:5°与10°的轴面聚合度对GI-Ⅱ全瓷冠的抗碎裂载荷的影响无差别(P>0.05);而15°组与5°、10°组相比较则有显著性差异(P<0.05)。结论:超过一定范围的轴面聚合度对GI-Ⅱ全瓷冠的抗碎裂载荷能力是有影响的。Objective： To explore the effect of three different axial wall convergence angles （5°, 10°, 15°） on the fracture resistance of GI-Ⅱ all-ceramic crowns. Methods： Three different axial wall convergence angles （5°,10°, 15°） were prepared respectively. All-ceramic crowns were fabricated with the GI- Ⅱ all-ceramic repairing system. Then 15 specimens were loaded with compression to failure. The computer connected with testing machine collected and analyzed all signals. Results： No significant difference was found in the failure load values between GI-Ⅱ all-ceramic crowns with the convergence of 5 ° and 10° （P〉0.05）. But higher failure load values were obtained from the GI- Ⅱ all ceramic crowns with the convergence of 15° than those with that of 5° and 10° （P〈0.05）. Conclusion： Convergence angles in special scope are able to affect the fracture resistance of GI- Ⅱ all-ceramic crowns.

关 键 词：基牙 轴面 聚合度 GI-Ⅱ全瓷冠 抗碎裂载荷 

分 类 号：R783[医药卫生—口腔医学]