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J Dent Res Dent Clin Dent Prospects. 2023;17(4): 222-226.
doi: 10.34172/joddd.2023.40483
  Abstract View: 259
  PDF Download: 143

Basic Research

Original Article

Assessment of peri-implant bone stress distribution with the effect of attachment type and implant location using finite element analysis

Shima Aalaei 1 ORCID logo, Atefeh Sheikhi 2, Parisa Mehdian 2, Farnoosh Taghavi 3, Sara Salimian 4, Farnaz Taghavi-Damghani 5,3* ORCID logo

1 Department of Prosthodontics, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
2 Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
3 Department of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4 Student Research Committee, Tehran University of Medical Sciences, Tehran, Iran
5 Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
*Corresponding Author: Farnaz Taghavi-Damghani, Email: dr.ftaghavi@gmail.com

Abstract

Background. The objective of the current research was to evaluate how stress is distributed in the peri-implant bone of a mandibular overdenture with implants placed asymmetrically to the midline.

Methods. A 26-year-old male’s mandible, with missing teeth, was examined using computed tomography (CT) scanning. Two implants were inserted at right angles to the occlusal plane, in the positions of the right canine and left lateral incisor of the mandible, with an internal connection. Two types of attachments (bar and ball) were designed. To simulate the clinical condition, anterior (on central incisors) and bilateral posterior (on premolars and molars) loadings were applied. The stress distribution was assessed using finite element analysis (FEA).

Results. The lateral incisor level implant was found to have the highest maximum principal stress (about 33 MPa) in both models in the anterior loading condition. However, in both models, the canine-level implant revealed more stress values (about 22 MPa) in the posterior loading condition.

Conclusion. In mandibular implant-supported overdentures, when implants were placed asymmetrically to the midline, one acted as a fulcrum and sustained more occlusal load. The bar attachment system did not reveal superior results in terms of stress distribution compared to the ball attachment.

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Submitted: 02 Jul 2023
Accepted: 09 Nov 2023
ePublished: 30 Dec 2023
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