中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (43): 6971-6976.doi: 10.3969/j.issn.2095-4344.2015.43.016

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

牙体剩余量对纤维桩核全冠修复体折裂模式的影响

聂二民1,鲁 洁2,姜 瑞1,张春元1,曾尽娣1,谈济州1     

  1. 1中山大学附属第一医院口腔科,广东省广州市  510080;2广东省中医二院口腔科, 广东省广州市  510095
  • 收稿日期:2015-07-29 出版日期:2015-10-15 发布日期:2015-10-15
  • 通讯作者: 张春元,硕士,教授,中山大学附属第一医院口腔科,广东省广州市 510080
  • 作者简介:聂二民,男,1980年生,河南省许昌市人,汉族,2007年中山大学毕业,硕士,主治医师,主要从事口腔临床医学方面研究。
  • 基金资助:

    广东省科技厅社会发展项目(2011B080701010,2012B061700066)

Effects of the remaining amount of tooth on the fracture mode of fiber post-core full crown restoration

Nie Er-min1, Lu Jie2, Jiang Rui1, Zhang Chun-yuan1, Zeng Jin-di1, Tan Ji-zhou1   

  1. 1Department of Stomatology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China; 2Department of Stomatology, the Second Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510095, Guangdong Province, China
  • Received:2015-07-29 Online:2015-10-15 Published:2015-10-15
  • Contact: Zhang Chun-yuan, Master, Professor, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • About author:Nie Er-min, Master, Attending physician, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • Supported by:

     the Social Development Project of Guangdong Provincial Science and Technology Department of China, No. 2011B080701010, 2012B061700066

摘要:

背景:研究表明,桩的植入和牙体剩余量的不同会改变残根内牙本质的应力分布模式,并对桩核修复体的折裂模式产生影响。
目的:评价进行纤维桩复合树脂核全冠修复时,在斜向加载条件下牙体剩余量对牙根折裂模式的影响。
方法:获取正畸拔除的人单根前磨牙40颗,行根管预备及填充后随机均分为4组,以通过颊侧和舌侧釉质牙骨质界中点并垂直于牙体长轴的平面为参照平面,使得牙体剩余量分别为0,1,2,3 mm,行纤维桩复合树脂核金属全冠修复。修复后进行速率为1 mm/min的45°斜向加载,记录牙根出现折裂时的折裂模式和加载-位移曲线。
结果与结论:0 mm组多发生牙颈部折裂,其余3组多发生根中部折裂,0 mm组的总折裂模式与其余3组比较差异有显著性意义(P < 0.05),1,2,3 mm组间总体折裂模式比较差异无显著性意义(P > 0.05)。在斜向加载条件下,当剩余牙体较少时,修复体易发生牙颈部折裂,纤维桩对牙根起到了保护作用,但临床失败概率增加;随着牙体剩余量的增加,折裂模式发生改变,从颈缘向根方转移。表明临床上对残根行纤维桩核冠修复时,应尽量保留冠部较多的牙体组织。
中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

关键词: 生物材料, 口腔生物材料, 纤维桩核, 折裂模式, 斜向加载, 加载-位移曲线, 口腔组织构建

Abstract:

BACKGROUND: Studies have demonstrated that implantation of pile and different amount of residual tooth can change the stress distribution patterns of the tooth dentin within the residual root, and have an effect on the fracture mode of post-core restoration. 

OBJECTIVE: To evaluate the effects of the different amount of residual tooth on the fracture mode under oblique loading conditions in fiber pile composite resin core full crown restoration.
METHODS: Forty single rooted premolars extracted from orthodontic patients were divided into four groups after root canal preparation and filling. The plane going through buccal and lingual enamel cementum border midpoint and perpendicular to the long axis of the tooth was taken as the reference plane, so that the remaining amount of the tooth were 0, 1, 2, 3 mm. Fiber pile composite resin core metal full restoration was conducted. After the repair, the oblique loading at 45° and at the rate of 1 mm/min was conducted. Fracture mode and load-displacementcurve when root fracture occurred were recorded. 

RESULTS AND CONCLUSION: The tooth neck fracture usually occurred in the 0 mm group, and central root fracture usually occurred in the remaining three groups. There was a significant difference in the total fracture mode between    0 mm group and the remaining three groups (P < 0.05). There was no significant difference in the total fracture mode between 1, 2 and 3 mm groups (P > 0.05). In oblique loading conditions, when the remaining tooth structure was small, the prosthesis was prone to have dental neck fracture. Fiber posts played a protective role in the tooth root, but the clinical probability of failure increased. The fracture mode was changed with the increase of residual tooth amount, transferring from the neck edge to the root. These results demonstrate that we must retain more tooth tissue from the crown in the restoration of residual root with fiber post-core crown.
中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

Key words: Post and Core Technique, Crowns, Dental Materials, Tissue Engineering