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Materials 2019, 12(2), 235; https://doi.org/10.3390/ma12020235

Finite Element Analysis of Novel Separable Fixture for Easy Retrievement in Case with Peri-Implantitis

1
Clinical Translational Research Center for Dental Science, Seoul National University Dental Hospital, Seoul 03080, Korea
2
Department of Mechanical Engineering, Sejong University, Seoul 05006, Korea
3
Dental Research Institute, Seoul National University, Seoul 03080, Korea
4
Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Seoul 03080, Korea
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 20 December 2018 / Revised: 31 December 2018 / Accepted: 8 January 2019 / Published: 11 January 2019
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Abstract

Peri-implantitis is a common complication following dental implant placement, which may lead to bone loss and fixation failure. With the conventional fixture, it is difficult to perfectly clear-up the infection. To solve this, we have designed a separable fixture of which the top part is replaceable. This study aimed to compare the structural and biomechanical stability of the separable and conventional fixture. A single surgical model corresponding to the first molar in a virtual mandible model and conventional/separable implants were reproduced to compare the biomechanical characteristics of the implants using finite element analysis (FEA). The loading condition was 200N preload in the first step, and 100N (Axial), 100N (15°), and 30N (45°) in the second step. The stress distribution on the cortical bone in the separable implant was lower than the conventional implant. In particular, the Peak von Mises Stress (PVMS) values of the separable implant under lateral load was found to be about twice as low as that of the conventional implant. In this study, we suggest that the separable implant has an equivalent biomechanical stability compared to the conventional implant, is easy to retrieve in the case of peri-implantitis, and has an excellent initial stability after the surgery when used in stage 2. View Full-Text
Keywords: peri-implantitis; dental implants; biomechanics; finite element analysis; separable fixture peri-implantitis; dental implants; biomechanics; finite element analysis; separable fixture
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kim, W.H.; Song, E.S.; Ju, K.W.; Lee, J.-H.; Kim, M.Y.; Lim, D.; Kim, B. Finite Element Analysis of Novel Separable Fixture for Easy Retrievement in Case with Peri-Implantitis. Materials 2019, 12, 235.

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