口腔医学研究

口腔医学研究 ›› 2019, Vol. 35 ›› Issue (9): 879-882.DOI: 10.13701/j.cnki.kqyxyj.2019.09.015

• 龋病牙髓病学研究 • 上一篇    下一篇

下颌前磨牙根管治疗后不同修复设计抗折性能的对比研究

贾颖1,2, 王频1, 王振国2, 刘敏1*   

  1. 1. 西南医科大学附属口腔医院 四川 泸州 646000;
    2. 成都医学院第一附属医院口腔科 四川 成都 610500
  • 收稿日期:2019-05-23 出版日期:2019-09-28 发布日期:2019-09-25
  • 通讯作者: 刘敏,E-mail:584494011@qq.com
  • 作者简介:贾颖(1979~ ),女,辽宁葫芦岛市人,讲师,主要从事口腔修复学的临床和研究工作。
  • 基金资助:
    四川省医学会科研基金(编号:Q15040)

A Comparative Study on Fracture Resistance of Difference Prosthesis Design of Mandibular Premolar Teeth after Root Canal Therapy

JIA Ying1,2, WANG Pin1, WANG Zhenguo2, LIU Min1*   

  1. 1. Stomatology Hospital Affiliated to Southwest Medical University, Luzhou 646000, China;
    2. Department of Stomatology, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
  • Received:2019-05-23 Online:2019-09-28 Published:2019-09-25

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摘要： 目的:比较IPS e.max Press热压铸瓷材料制作的全冠、高嵌体、牙合贴面修复根管治疗后的下颌前磨牙的抗折强度并观察折裂模式。方法:根管治疗后的下颌前磨牙随机分为4组,每组6颗离体牙,A组树脂充填作为对照组;B组全冠修复;C组高嵌体修复;D组牙合贴面修复。将4组标本进行静态加载直至试件出现破坏。记录破坏力值及折裂模式。实验结果采用SPSS 20.0软件进行统计分析。结果:4组样本抗折强度实验力值分别为(1136.50±338.34)、(1947.83±411.60)、(2335.00±747.45)、(2249.50±632.38)N。3个实验组与对照组相比差异均有显著性(P<0.05)。实验组间无统计学差异。结论:全冠、高嵌体和牙合贴面组的抗折强度明显大于树脂充填组。全冠、高嵌体和牙合贴面组间抗折强度无明显差异。

关键词: 全冠, 高嵌体, 牙合贴面, 抗折强度, 破坏模式

Abstract: Objective: To compare the fracture strength and fracture mode of crown, onlay, and occlusal veneer made by IPS e.max Press for mandibular premolar teeth after root canal treatment. Methods: The mandibular premolars treated with root canal were randomly divided into 4 groups with 6 detached teeth in each group, resin filling in group A was used as the control group, crown restoration in group B, onlay in group C, and occlusal veneer in group D. Four groups of specimens were statically loaded until the specimen was damaged. The damage value and fracture mode were recorded. SPSS 20.0 software was used for statistical analysis of the experimental. Results: The fracture strength of four groups of samples were (1136.50±338.34), (1947.83±411.60), (2335.00±747.45), and (2249.50±632.38) N. The differences between three experimental groups and the control group were all significant (P<0.05). There was no significant difference between the experimental groups. Conclusion: The fracture strength of experimental groups was significantly higher than that of control group. There was no significant difference in flexural strength between the experimental groups.

Key words: crown, onlay, occlusal veneer, fracture resistance, failure mode