Effect of different implant configurations on biomechanical behavior of full-arch implant-supported mandibular monolithic zirconia fixed prostheses

Zhong J 1 , Guazzato M 2 , Chen J 3 , Zhang Z 4 , Sun G 5 , Huo X 6 Show all authors , Liu X 7 , Ahmad R 8 , Li Q 9

Affiliations 

  • 1 School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Australia. Electronic address: jzho8431@uni.sydney.edu.au
  • 2 Discipline of Prosthodontics, Faculty of Dentistry, Westmead Centre for Oral Health, Westmead Hospital, Australia. Electronic address: max.guazzato@sydney.edu.au
  • 3 School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Australia; College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK. Electronic address: J.Chen3@exeter.ac.uk
  • 4 School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW, 2751, Australia. Electronic address: leo.zhang@westernsydney.edu.au
  • 5 School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Australia; State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha, 410082, China. Electronic address: guangyong.sun@sydney.edu.au
  • 6 State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha, 410082, China. Electronic address: huoxintao@hnu.edu.cn
  • 7 State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha, 410082, China. Electronic address: liuxinglong@hnu.edu.cn
  • 8 Unit of Prosthodontics, Faculty of Dentistry, Universiti Teknologi MARA, Sg Buloh 47000 Malaysia. Electronic address: drrohana@uitm.edu.my
  • 9 School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Australia. Electronic address: qing.li@sydney.edu.au
J Mech Behav Biomed Mater, 2020 02;102:103490.
PMID: 31877512 DOI: 10.1016/j.jmbbm.2019.103490

Abstract

Mechanical failure of zirconia-based full-arch implant-supported fixed dental prostheses (FAFDPs) remains a critical issue in prosthetic dentistry. The option of full-arch implant treatment and the biomechanical behaviour within a sophisticated screw-retained prosthetic structure have stimulated considerable interest in fundamental and clinical research. This study aimed to analyse the biomechanical responses of zirconia-based FAFDPs with different implant configurations (numbers and distributions), thereby predicting the possible failure sites and the optimum configuration from biomechanical aspect by using finite element method (FEM). Five 3D finite element (FE) models were constructed with patient-specific heterogeneous material properties of mandibular bone. The results were reported using volume-averaged von-Mises stresses (σVMVA) to eliminate numerical singularities. It was found that wider placement of multi-unit copings was preferred as it reduces the cantilever effect on denture. Within the limited areas of implant insertion, the adoption of angled multi-unit abutments allowed the insertion of oblique implants in the bone and wider distribution of the multi-unit copings in the prosthesis, leading to lower stress concentration on both mandibular bone and prosthetic components. Increasing the number of supporting implants in a FAFDPs reduced loading on each implant, although it may not necessarily reduce the stress concentration in the most posterior locations significantly. Overall, the 6-implant configuration was a preferable configuration as it provided the most balanced mechanical performance in this patient-specific case.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

MeSH terms
Similar publications