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Submitted: 19 Sep 2018
Revision: 30 Dec 2018
Accepted: 03 Jan 2019
ePublished: 19 Jan 2019
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J Adv Periodontol Implant Dent. 2018;10(2): 77-84.
doi: 10.15171/japid.2018.012
  Abstract View: 239
  PDF Download: 134

Original Article

Patterns of stress and strain in complete-arch prostheses supported by four or six implants: A literature review of finite element analyses

Nasrin Keshavarz Valian 1, Mohammad Reza Talebi Ardakani 1, Alireza Aziz Ahari 2, Mohammad Taghi Baghani 3, Shireen Shidfar 4*

1 Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Department of Radiology, Rasool-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
3 Department of Prosthodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4 Department of Periodontics, School of Dentistry, Qom University of Medical Sciences, Qom

Abstract

Background. Tilted implants have been recommended as an alternative to the bone graft procedures in implant sites although with possibly higher stress concentrations. This study reviews finite element studies to evaluate patterns of stress and strain in complete-arch prostheses supported by 4‒6 implants. Methods. A literature search was performed using the online databases. Articles published in English from 2003 to 2015 were reviewed. A total of 100 articles were found related to the subject and after evaluating the titles and abstracts, 18 studies were selected. Results. By increasing the number of implants, a reduction was detected in the amount of stress in the bone and implants, while in others, the stress level did not change with the increase in the number of implants. Conclusion. According to finite element analyses, placing a distal implant in an angular position results in better distribution of forces and stresses. Using less cantilever lengths would reduce the stress.
Keywords: Finite element analysis, Stress, All-on-Four implant treatment design, All-on-six implant treatment design
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Abstract View: 239

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PDF Download: 134

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