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通过有限元分析评估3单位和5单位牙齿及种植体支持的固定氧化锆修复体周围种植体和牙周骨组织中的应力分布。

Evaluation of stress distributions in peri-implant and periodontal bone tissues in 3- and 5-unit tooth and implant-supported fixed zirconia restorations by finite elements analysis.

作者信息

Guven Sedat, Beydemir Koksal, Dundar Serkan, Eratilla Veysel

机构信息

Department of Prosthetic Dentistry, Faculty of Dentistry, Dicle University, Diyarbakir, Turkiye.

Department of Periodontology, Faculty of Dentistry, Firat University, Elazig, Turkiye.

出版信息

Eur J Dent. 2015 Jul-Sep;9(3):329-339. doi: 10.4103/1305-7456.163223.

DOI:10.4103/1305-7456.163223
PMID:26430359
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4569982/
Abstract

OBJECTIVE

In this study, it is aimed to compare the distribution of stress on periodontal and peri-implant bone tissues in 3- and 5-unit-dental and implant-supported zirconia restorations using finite element analysis.

MATERIALS AND METHODS

Stress distribution formed in periodontal and peri-implant bone tissues as a result of chewing forces was analyzed in dental and implant-supported three-dimensional (3D) finite element models of zirconia restoration with 5-unit placed on the numbers of 43, 44, 45, 46, and 47 and with 3-unit placed on the number of 45, 46, and 47. Four different loading conditions were used. 200 N force was applied in 30° from the buccal inclination of number 43, 45, and 47 restorations separately and totally 850 N force was applied in 30° from the buccal inclination of whole restoration. The study was performed through static nonlinear analysis with the 3D finite element analysis method.

RESULTS

Stress accumulation in bone tissues in the tooth-supported model was found less than in implant-supported models. Stress accumulation was observed in the cervical portion of the implant in implant-supported models, and stress accumulation was observed surrounding bone of roots in tooth-supported models. The highest stress values were occurred in 5 unit implant-supported model in all loadings.

CONCLUSION

In posterior restorations increased in the number of supported teeth and implant can reduce the destructive forces on periodontal and peri-implant bone tissues and may allow longer period retention of the restorations in the mouth.

摘要

目的

本研究旨在通过有限元分析比较3单位和5单位牙支持及种植体支持的氧化锆修复体中牙周和种植体周围骨组织的应力分布。

材料与方法

在43、44、45、46和47号牙位上放置5单位以及在45、46和47号牙位上放置3单位的氧化锆修复体的牙支持和种植体支持的三维（3D）有限元模型中，分析咀嚼力作用下牙周和种植体周围骨组织形成的应力分布。采用四种不同的加载条件。分别从43、45和47号修复体的颊侧倾斜30°施加200 N力，从整个修复体的颊侧倾斜30°施加总计850 N力。采用3D有限元分析方法通过静态非线性分析进行研究。

结果

发现牙支持模型中骨组织的应力积聚小于种植体支持模型。在种植体支持模型中，在种植体颈部观察到应力积聚，在牙支持模型中，在牙根周围骨组织观察到应力积聚。在所有加载情况下，5单位种植体支持模型中的应力值最高。

结论

在后牙修复中，增加支持牙和种植体的数量可以减少牙周和种植体周围骨组织上的破坏力，并可能使修复体在口腔中保留更长时间。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/9dbf23f4ba52/EJD-9-329-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/16ba46ae9fad/EJD-9-329-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/819a89b212ea/EJD-9-329-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/c8cce1595b8d/EJD-9-329-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/03f042381323/EJD-9-329-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/5ce7d7bf4971/EJD-9-329-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/9f9b26bb1afb/EJD-9-329-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/5a7f968c49ff/EJD-9-329-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/9dbf23f4ba52/EJD-9-329-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/16ba46ae9fad/EJD-9-329-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/819a89b212ea/EJD-9-329-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/c8cce1595b8d/EJD-9-329-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/03f042381323/EJD-9-329-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/5ce7d7bf4971/EJD-9-329-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/9f9b26bb1afb/EJD-9-329-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/5a7f968c49ff/EJD-9-329-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/60d3/4569982/9dbf23f4ba52/EJD-9-329-g012.jpg

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