牙体牙髓治疗材料对牙本质抗折性能的影响

doi:10.13418/j.issn.1001-165x.2017.02.018

中国临床解剖学杂志 ›› 2017, Vol. 35 ›› Issue (2): 207-210.doi: 10.13418/j.issn.1001-165x.2017.02.018

牙体牙髓治疗材料对牙本质抗折性能的影响

易思¹，　吴补领²，　唐雷¹，　李鉴轶¹，　徐稳安²，　陈佳婧²，　宋颖^1，3，　徐楚^1，2，　徐迪威¹

1.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，广州 510515； 2.南方医科大学南方医院
口腔医院，广州 510515； 3.南方医科大学珠江医院口腔科，广州 510282

收稿日期:2016-06-03 出版日期:2017-03-25 发布日期:2017-04-27
通讯作者: 唐雷，研究员，Tel: (020) 62789091，E-mail: cdheg@126.com
作者简介:易思（1989-），女，湖南湘潭人，在读硕士，主要从事口腔生物力学方面的研究，Tel: (020) 62789091，E-mail: 790925891@qq.com
基金资助:
国家自然基金重大项目（61190120, 61190122, 611901 23）

Effect of materials in the treatment of endodontic diseases on the dentin’s fracture resistance

YI Si¹, WU Bu-lin², TANG Lei¹, XU Wen-an², LI Jian-yi¹, CHEN Jia-jing², SONG Ying ^1，3, XU Chu ^1，2, XU Di-wei¹

1. Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China; 2. Department of Stomatology, Nanfang Hospital，Southern Medical University, Guangzhou 510515, China; 3. Department of stomatology，Zhujiang Hospital, Southern Medical University, Guangzhou 510282，China

Received:2016-06-03 Online:2017-03-25 Published:2017-04-27
Contact: TANG Lei, E-mail:cdheg@126.com

摘要/Abstract

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（P<0.05)。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（P<0.05）。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。

关键词: Biodentine, MTA, 抗折性能, 三点弯曲强度, 弯曲模量

Abstract:

Objective　To investigate the effect of Biodentine and MTA on the dentin’s fracture resistance.　Methods　40 fresh extracted Chinese rural dogs’ canines were collected and randomly divided into 5 groups. The crowns and the cementum of the teeth were dissected. Each tooth was prepared with unity sample at the length of about 25 mm. Five groups’ samples were filled with different medicines. The three-point flexural strength and flexural modulus of the experimental specimens were determined by applying a vertical splitting load through a specially shaped steel rod. The maximum load value of root fracture was tested after three months. Results The average three-point flexural strength of the five groups was sequentially: (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. The average three-point flexural strength of the five groups were in order: (19.50±1.03)GPa ; (9.62±1.34) GPa ; (17.08±1.14)GPa ; (15.73±2.14) GPa ; (15.73±2.14) GPa; (7.63±1.11) GPa. The data were analyzed by one way ANOVA and LSD method (P<0.05). The risk of pulpless root fracture may increase obviously as time goes by. The differences of the effect of Biodentine and MTA on the dentin’s fracture resistance remains no statistically significant. Compared with the positive control group, MTA and Biodentine did not increase or restore the fracture resistance of dentin. But compared with the negative control group and Vitapex, Biodentine and MTA could significantly increase the fracture resistance of dentin.　Conclusion　As a new biological dentin substitute materials, compared with the traditional calcium silicate material-MTA, Biodentine did not have the obvious advantage in improving the flexural properties of dentine.

Key words: Biodentine, MTA, Fracture resistance, Three-point flexural strength, Flexural modulus

易思,吴补领,唐雷,李鉴轶,徐稳安,陈佳婧,宋颖,徐楚,徐迪威. 牙体牙髓治疗材料对牙本质抗折性能的影响[J]. 中国临床解剖学杂志, 2017, 35(2): 207-210.

YI Si, WU Bu-lin, TANG Lei, XU Wen-an, LI Jian-yi, CHEN Jia-jing, SONG Ying, XU Chu, XU Di-wei. Effect of materials in the treatment of endodontic diseases on the dentin’s fracture resistance[J]. Chinese Journal Of Clinical Anatomy, 2017, 35(2): 207-210.

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牙体牙髓治疗材料对牙本质抗折性能的影响

Effect of materials in the treatment of endodontic diseases on the dentin’s fracture resistance

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