Biomechanical Evaluation of Initial Stability of a Root Analogue Implant Design with Drilling Protocol: A 3D Finite Element Analysis
- Authors
- Lee, Ki-Sun; Lee, Won-Chang; Kim, Pan-Gyu; Park, Ji-Man; Koo, Ki-Tae; Ryu, Jae-Jun; Shin, Sang-Wan
- Issue Date
- 6월-2020
- Publisher
- MDPI
- Keywords
- root analogue implant; initial stability; finite element analysis
- Citation
- APPLIED SCIENCES-BASEL, v.10, no.12
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SCIENCES-BASEL
- Volume
- 10
- Number
- 12
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/55430
- DOI
- 10.3390/app10124104
- ISSN
- 2076-3417
- Abstract
- Background: The aim of this study was to biomechanically evaluate the initial stability of a patient-specific root analogue implant (RAI) design with drilling protocol by comparing it to designs without drilling protocol through a 3D finite element analysis (FEA). Methods: A 3D surface model of an RAI for the upper right incisor was constructed. To evaluate the effect of root apex drilling, four modified RAI shapes were designed with the press-fit implantation method: Non-modified, wedge added at root surface, lattice added at root surface, and apex-anchor added at root apex (AA). Each model was subjected to an oblique load of 100 N. To simulate the initial stability of implantation, contact conditions at the implant-bone interface were set to allow for the sliding phenomenon with low friction (frictional coefficient 0.1-0.5). Analysis was performed to evaluate micro-displacements of the implants and peak stress on the surrounding bones. Results: Under all low frictional coefficient conditions, the lowest von Mises stress level on the cortical bone and fewest micro-displacements of the implant were observed in the AA design. Conclusion: In view of these results, the AA design proved superior in reducing the stress concentration on the supporting cortical bone and the micro-displacement of RAI.
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