Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (32): 5146-5151.doi: 10.3969/j.issn.2095-4344.2017.32.011

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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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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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