摘要
将下颌后磨牙及其桩核修复体包埋于复合树脂模拟的牙周组织中,形成18 mm×16 mm×22 mm的包埋块,利用数字化光学测试手段得到两者在垂直载荷作用下的位移和应变,并对其进行了力学分析.结果表明:(1)在同级载荷作用下,桩核修复体的应变大于原始牙,建议避免使用过大的咀嚼力;(2)桩核修复体虽然充分利用残根的生理几何特征,但分散牙体传递的力却是一个渐进过程;(3)光测技术为口腔医学领域提供了另外一种有效的分析途径.
A normal mandibular molar and its post-core prosthesis were embedded in periodontal support simulated by composite resin and formed a embedded block with size 18 mm × 16 mm× 22 ram. By digital optical test, their displacement and strain were obtained under a vertical applied force. Meanwhile, mechanical characteristic were analyzed. Based on the study, the following results are obtained. （1） With loads at the same level, the strain of postcore prosthesis is higher than the strain of original molar; therefore, high occlusion loads should be avoided. （2）By postcore prosthesis, advantage of inherent geometry features of left root can be taken, which is a gradual process of dispersing occlusion loads. （3）It is proved that the digital optical method is an alternative means in stomatology.
出处
《应用科学学报》
CAS
CSCD
北大核心
2006年第6期637-641,共5页
Journal of Applied Sciences
基金
江苏省卫生厅科技基金重点科研课题资助项目(Z200319)
关键词
工程力学
应变
数字图像分析
桩核修复
下颌后磨牙
engineering mechanics
strain
digital image analysis
post-core prosthesis
mandibular molar
