Finite element analysis of stress distributions in mono- and bi-cortical dental implants

Materials Science & Engineering. C, Materials for Biological Applications
F LofajL Kvetková

Abstract

The finite element analysis (FEA) of the stress distribution in the mono- and bicortically fixed implants subjected to 3-axial loading was performed and verified experimentally on a model mandible to evaluate the benefits of each type of fixation from the viewpoint of the compressive stress reduction in the cortical part of atrophied mandible. The analysis revealed that the highest compressive stresses in the cortical bone are generated at the edge of the cortical bone where the highest torque from the implant is acting. The most effective way to reduce the maximum level of compressive stresses in the cortical bone and in the implant is the recession of the implant thread slightly below the surface of the cortical bone. Shortening of the intraosseal length of the implant and/or thinning of the upper cortical bone result in a substantial increase of the maximum compressive stresses. The comparison of FEA and model experiments suggests that bicortical fixation is the most efficient in the fresh implants and the advantage of bicortical fixation compared to monocortical fixation decreases with time due to osteointegration, possibly as a result of gradual suppression of sliding between the bone and implant during loading.

References

Aug 1, 1988·International Journal of Oral and Maxillofacial Surgery·J I Cawood, R A Howell
Dec 1, 1996·Clinical Oral Implants Research·R Mericske-SternG Sirtes
May 7, 2004·Clinical Implant Dentistry and Related Research·Laurent PierrisnardMichel Barquins
Aug 27, 2010·International Journal of Oral Science·Juraj StrechaSonia Bartakova
May 3, 2011·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Joseph NissanGavriel Chaushu
Oct 29, 2011·Journal of Dental Research·S AnnibaliA Pilloni
Apr 12, 2014·The Journal of Prosthetic Dentistry·Dong-Won LeeIk-Sang Moon

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Citations

Apr 5, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Joel Ferreira Santiago JuniorEduardo Piza Pellizzer
Apr 16, 2016·Computer Methods in Biomechanics and Biomedical Engineering·Fellippo Ramos VerriEduardo Piza Pellizzer
Sep 23, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Ranulfo Benedito de Paula MirandaPaulo Francisco Cesar
Oct 27, 2021·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Mohammad Reza NiroomandSayedali Mousavi

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