不同边缘设计对钴铬合金烤瓷髓腔固位冠微渗漏影响的研究  

The effect of different margin designs on the microleakage of Co-Cr PFM endocrowns

作　　者：王之铭 郭靖[1] 赵彤[2] 李鸿波[3] 

机构地区：[1]解放军总医院口腔科,硕士生北京100853 [2]中国科学院大学数学科学学院,副教授北京100049 [3]解放军总医院口腔医学中心,副主任医师副教授北京100853

出　　处：《中华老年口腔医学杂志》2017年第1期33-36,共4页Chinese Journal of Geriatric Dentistry

基　　金：北京市科技计划项目(项目编号:Z141100002114031)

摘　　要：目的:研究不同边缘设计对钴铬合金烤瓷髓腔固位冠边缘微渗漏的影响。方法:选取32颗下颌离体磨牙,随机分为4组,分别按改良直角型(A组)、斜面型(B组)、浅凹型(C组)、平面对接型(D组)四种边缘设计进行髓腔固位冠修复基牙预备。SLM方法制作钴铬合金烤瓷髓腔固位冠内冠、常规上瓷,采用Multilink N高强度树脂粘接剂粘接。经5000次冷热循环后浸泡在2%碱性品红溶液下24小时。沿颊舌向将离体牙均匀四等分片切,NIKON SMZ1500体式显微镜下观察修复体边缘剖面染料渗透情况,分级评估,对各组微渗漏等级指标进行单因素方差分析及Duncan多重比较。结果:边缘微渗漏等级平均值C组<B组<A组<D组,各边缘设计对边缘微渗漏的影响有统计学意义(P<0.05)。结论:对于钴铬合金烤瓷髓腔固位冠,选择浅凹型边缘设计更有利于减少微渗漏的发生。Objective：To study the effect of different finish line design on the marginalmicroleakage of cobalt-chromium alloy porcelain endocrowns.Methods：32 isolated mandibularmolars were selected and randomly divided into four different finishing line design groups： the round shoulder type（group A）, the bevel type（group B）, the chamfer typ e（group C）, and the flat margin type（group D）. The inner crown of cobalt-chromium alloy porcelain endocrowns were fabricated by SLM technology, conventional porcelain and adhesived with Multilink N resin cement. After experiencing 5000 times of thermocycling, the specimens were immersed in a 2.0% basic red fuchsine dye solution for 24 hours.Each tooth was sectioned along the buccolingual direction into four equal parts and the marginal dye leakage was observed by NIKON SMZ1500 stereomicroscope. The marginal microleakage grade of four groups were analyzed with one-way ANOVA and Duncan multiple comparison. Results： The mean value o f marginal microleakage ranked from high to low were group D,group A,group B, group C, the influence of finishing line design on the marginal microleakage has significant statistical difference（P〈 0.05）. Conclusion： For cobalt-chromium alloy porcelain endocrowns, the chamfer design is more conducive to reducing microleakage.

关 键 词：钴铬合金 髓腔固位冠 微渗漏 肩台 

分 类 号：R783.3[医药卫生—口腔医学]