中国组织工程研究

中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (32): 5146-5151.doi: 10.3969/j.issn.2095-4344.2017.32.011

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

种植体与天然牙联合支持固定桥的生物力学分析

刘  伟1，聂二民2，姜  瑞2，张春元2，黄喆逊2，张宇航2，史剑杰1，黄咏瑜1，罗  宝1，薛延香1，梁  韵1   

  1.  (1广州医科大学附属第三医院荔湾医院口腔科，广东省广州市  510000；2中山大学附属第一医院口腔科，广东省广州市  510080)
  • 收稿日期:2017-10-13 出版日期:2017-11-18 发布日期:2017-11-15
  • 通讯作者: 聂二民，主治医师，中山大学附属第一医院口腔科，广东省广州市 510080
  • 作者简介:刘伟，男，1986年生，安徽省合肥市人，汉族，2011年中山大学毕业，硕士，主治医师，主要从事口腔修复种植方面的研究。
  • 基金资助:

    广东省科技厅社会发展项目(2012B061700066)

Biomechanics study on implant-natural tooth supported fixed partial dentures

Liu Wei1, Nie Er-min2, Jiang Rui2, Zhang Chun-yuan2, Huang Zhe-xun2, Zhang Yu-hang2, Shi Jian-jie1, Huang Yong-yu1, Luo Bao1, Xue Yan-xiang1, Liang Yun1   

  1.  (1Department of Stomatology, the Liwan Hospital of the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong Province, China; 2Department of Stomatology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China)
  • Received:2017-10-13 Online:2017-11-18 Published:2017-11-15
  • Contact: Nie Er-min, Attending physician, Department of Stomatology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • About author:Liu Wei, Master, Attending physician, Department of Stomatology, the Liwan Hospital of the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong Province, China
  • Supported by:

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

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被引次数

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摘要：

文章快速阅读：

文题释义：
应力：物体由于外因(受力、湿度、温度场变化等)而变形时，在物体内各部分之间产生相互作用的内力，以抵抗这种外因的作用，并试图使物体从变形后的位置恢复到变形前的位置。在所考察的截面某一点单位面积上的内力称为应力。同截面垂直的称为正应力或法向应力，同截面相切的称为剪应力或切应力。
应变：物体在受到外力作用下会产生一定的变形，变形的程度称应变。应变有正应变(线应变)，切应变(角应变)及体应变。
摘要
背景：天然牙和种植体应力分布模式不尽相同，种植体-天然牙联合支持式固定桥的应力分布模式有待探讨。
目的：对种植体、天然牙单冠以及种植体-天然牙联合支持固定桥进行垂直载荷，分析种植体骨界面与天然牙牙周的应力、应变分布情况。
方法：选用2只成年雄性Beagle犬，全麻下拔除2只犬右侧下颌第一磨牙，3个月后拔牙区植入1颗Straumann 3.3 mm×10 mm常规颈种植体。3个月后麻醉处死，去处软组织后取完整下颌骨，一只犬行右侧下颌第四双根牙单冠和种植体单冠修复，另一只犬行联冠修复。下颌骨采用自凝塑料包埋后固定在加载装置上，在种植体和天然牙颈部相对应的颊舌侧皮质骨上贴应变片，并贴相应的电阻补偿片。在种植体、天然牙单冠以及种植体-天然牙固定桥基牙咬合面上分别采用40，60，80，120及160 N的力进行垂直加载。
结果与结论：①种植体天-然牙联合修复后，当加载在种植体上时，其应变值要小于加载在种植体单冠上的应变值，部分负荷为天然牙承担；当加载在天然牙上时，其应变值要小于加载在天然牙单冠的应变值，部分负荷为种植体承担；②种植体-天然牙联合固定桥时，加载在天然牙基牙上时，应力由种植体和天然牙共同承担；而加载在种植体上基牙时，应力基本由种植体承担；③提示临床上种植体-天然牙联合固定桥修复是可行的。

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程
ORCID: 0000-0002-2122-8085(刘伟)

关键词: 组织构建, 组织工程, 电阻应变法, 生物力学, 应变, 种植体, 天然牙

Abstract:

BACKGROUND: The stress distribution is different between implants and natural teeth, and the biomechanical characters of implant-natural tooth supported fixed partial dentures need to be explored.
OBJECTIVE: To analyze the distributions of stress and strain on the implant interface and natural tooth ligaments by loading a vertical force to a single implant crown, natural tooth crown and a implant-natural tooth supported fixed partial denture.
METHODS: Two male healthy Beagle dogs were selected, and their right mandibular first molars were exacted under general anesthesia. Three months later, a 3.3 mm×10 mm RN ITI implant was implanted into the defect region of each dog. The dogs were killed under anesthesia after another 3 months to remove the mandible. One dog was restored by a single implant and natural tooth crown, and the other was restored by the implant-natural tooth supported fixed partial dentures. The specimens were fixed to the load device after embedded with self caring acrylic resin, and the strain gauges were pasted to the cortical bone around the implant and natural tooth neck. The vertical force was loaded to the implant, natural tooth and fixed denture with 40, 60, 80,120, and 160 N.
RESULTS AND CONCLUSION: When the force was loaded to the implant of combined denture, the implant stress of combined denture was less than that of the single implant repair, and partial force was loaded on natural teeth; when the force was loaded to the natural tooth of combined denture, the stress to the natural tooth of combined denture was less than that of the single natural tooth repair. When the force was loaded to the natural tooth of combined denture, the stress was assumed by the whole prostheses. However, the stress was almost assumed by the implant when the force was loaded to the implant of combined denture. That is to say, it is feasible to use the implant-natural tooth supported fixed partial dentures.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Biomechanics, Stress, Electric Impedance, Dental Implants, Tissue Engineering

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