牙体牙髓治疗材料对牙本质抗折性能的影响

发布时间：2018-06-20 18:52

本文选题：Biodentine + MTA　；参考：《中国临床解剖学杂志》2017年02期

【摘要】：目的探究Biodentine和MTA对牙本质抗折性能的影响。方法选40颗中华田园犬尖牙,截冠、去除牙骨质并截去根尖,随机等分为5组。分别在根管内充填不同药物,3个月后行力学测试,得到标本3点弯曲强度和弯曲模量。结果各组标本3点弯曲强度分别:(154.77±16.51)MPa;(125.00±15.72)MPa;(140.81±11.99)MPa;(139.26±16.09)MPa;(120.17±14.21)MPa,单因素方差分析,F=6.74(P0.05)。各组标本弯曲模量分别为:(19.50±1.03)GPa;(9.62±1.34)GPa;(17.08±1.14)GPa;(15.73±2.14)GPa;(7.63±1.11)GPa;单因素方差分析,F=102.94(P0.05)。Biodentine和MTA对牙本质抗折性能的影响无统计学差异;与阳性对照组相比,Biodentine和MTA并不能提高牙本质抗折性能;与空白对照组和Vitapex相比,Biodentine和MTA能明显增加牙本质抗折性能。结论作为新兴生物性牙本质替代材料,与传统硅酸钙盐材料MTA相比,Biodentine在提高无髓牙牙本质抗折性能方面,并不具备明显优势。
[Abstract]:Objective to investigate the effects of Biodentine and MTA on dentin fracture resistance. Methods 40 Chinese idyllic dogs were randomly divided into 5 groups, including canine, crown amputation, bone removal and root tip amputation. Different drugs were filled in the root canal respectively. After 3 months of mechanical test, the three point bending strength and modulus of the specimen were obtained. Results the flexural strength of each group was 154.77 卤16.51g MPA (125.00 卤15.72mb) respectively. The mean bending strength of each group was 139.26 卤16.09 卤16.09 MPA and 125.00 卤15.72MPA, respectively. The single-factor ANOVA analysis of F6.74P0.05a showed that the bending strength of each group was 120.17 卤14.21mMPA, and the results were as follows: (1) the bending strength of each group was 125.00 卤15.72 卤15.72MPA, respectively. The flexural modulus of each group was 9.62 卤1.34 GPaA (9.62 卤1.34) GPaa (15.73 卤2.14) GPaA 7.63 卤1.11GPaA respectively, the effect of biodentine and MTA on dentin fracture resistance was not significantly different in univariate ANOVA analysis of variance (ANOVA), compared with the positive control group, Biodentine and MTA could not improve the dentin anti-fracture performance. Compared with the control group and Vitapex, Biodentine and MTA could significantly increase the fracture resistance of dentin. Conclusion as a new biological dentin substitute material, Biodentine has no obvious advantage in improving the fracture resistance of unmyelinated dentin compared with the traditional calcium silicate material MTA.
【作者单位】：南方医科大学解剖学教研室广东省医学生物力学重点实验室;南方医科大学南方医院口腔医院;南方医科大学珠江医院口腔科;
【基金】：国家自然基金重大项目(61190120,61190122,61190123)
【分类号】：R783.1

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