粘接剂排溢沟对后牙氧化锆全冠适合性的影响

发布时间：2018-01-31 05:58

本文关键词： 粘接剂排溢沟边缘适合性内部适合性　出处：《中国医科大学学报》2017年10期 　论文类型：期刊论文

【摘要】：目的研究粘接剂排溢沟对后牙全冠适合性的影响。方法三维建模一颗下颌第一磨牙,在Rhinoceros 5.0软件中设计4种预备体模型:A为常规全冠预备设计,B、C、D分别在A组的基础上设计1、2、4个粘接剂排溢沟,3D打印树脂预备体各5个。根据A预备体设计全冠,CAD/CAM制作氧化锆全冠20个,完全随机分为4组。三维扫描仪扫描试件,进行偏差分析及壁厚分析。硅橡胶法复制冠与预备体之间的间隙,金相显微镜下观察,并测量间隙大小。SPSS 17.0软件进行统计分析。结果全冠边缘和内部间隙从大到小依次为A组、B组、C组、D组,两两比较差异有统计学意义(P0.05)。结论粘接剂排溢沟能显著提高全冠的适合性,且排溢沟数量越多,全冠适合性越好。
[Abstract]:Objective to study the effect of adhesive drainage on the crown fitness of posterior teeth. Methods A mandibular first molar was established by 3D modeling. Rhinoceros 5.0 software was used to design four kinds of prep models: 1 / 2 and 4 / 4 adhesives for the routine crown preparation design respectively on the basis of group A (1 / 2) and 4 adhesives for discharge of overflow ditches. The whole crown of Zirconia was made by CAD / CAM according to the design of preparation A, and was randomly divided into 4 groups. The specimens were scanned by 3D scanner. Deviation analysis and wall thickness analysis were carried out. The gap between the replicating crown and the preparatory body was observed under metallographic microscope. SPSS 17.0 software was used to analyze the space size. Results the order of the whole crown margin and the inner space was group A and B and group C and D respectively. Conclusion the overflowing ditch with adhesive agent can significantly improve the suitability of the whole crown, and the more the number of overflow ditch, the better the suitability of the whole crown.
【作者单位】：锦州医科大学研究生院;锦州医科大学附属第二医院修复科;
【基金】：辽宁省自然科学基金(2013022012)
【分类号】：R783.3
【正文快照】： 全冠适合性是修复体与预备牙之间的间隙,包括边缘适合性和内部适合性[1],其体现牙冠与牙体接触的密合程度,临床上用粘接剂厚度来表示[2]。提高全冠的适合性,不仅能提升美学效果、增加冠的固位、延长牙冠的使用寿命,还能在长期使用中减少粘接剂溶解和微渗漏[3-4]。因此提高全冠

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