Biomechanics study on implant-natural tooth supported fixed partial dentures
10.3969/j.issn.2095-4344.2017.32.011
- VernacularTitle:种植体与天然牙联合支持固定桥的生物力学分析
- Author:
Wei LIU
1
;
min Er NIE
;
Rui JIANG
;
yuan Chun ZHANG
;
xun Zhe HUANG
;
hang Yu ZHANG
;
jie Jian SHI
;
yu Yong HUANG
;
Bao LUO
;
Yun YAN-XIANG
;
Liang XUE
Author Information
1. 广州医科大学附属第三医院荔湾医院口腔科
- From:
Chinese Journal of Tissue Engineering Research
2017;21(32):5146-5151
- CountryChina
- Language:Chinese
-
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.
