Finite element analysis of dental implant loading on atrophic and non-atrophic cancellous and cortical mandibular bone - a feasibility study
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25468296
DOI
10.1016/j.jbiomech.2014.10.019
PII: S0021-9290(14)00540-5
Knihovny.cz E-resources
- Keywords
- Bone-implant-contact, Dental implant, Finite element analysis, Mandible, Micro-CT,
- MeSH
- Finite Element Analysis * MeSH
- Dental Stress Analysis methods MeSH
- Atrophy MeSH
- Bone and Bones MeSH
- Humans MeSH
- Mandible pathology physiology MeSH
- X-Ray Microtomography MeSH
- Feasibility Studies MeSH
- Weight-Bearing MeSH
- Dental Implants adverse effects MeSH
- Dental Restoration Failure * MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Dental Implants MeSH
The first aim of this study was to assess displacements and micro-strain induced on different grades of atrophic cortical and trabecular mandibular bone by axially loaded dental implants using finite element analysis (FEA). The second aim was to assess the micro-strain induced by different implant geometries and the levels of bone-to-implant contact (BIC) on the surrounding bone. Six mandibular bone segments demonstrating different grades of mandibular bone atrophy and various bone volume fractions (from 0.149 to 0.471) were imaged using a micro-CT device. The acquired bone STL models and implant (Brånemark, Straumann, Ankylos) were merged into a three-dimensional finite elements structure. The mean displacement value for all implants was 3.1 ±1.2 µm. Displacements were lower in the group with a strong BIC. The results indicated that the maximum strain values of cortical and cancellous bone increased with lower bone density. Strain distribution is the first and foremost dependent on the shape of bone and architecture of cancellous bone. The geometry of the implant, thread patterns, grade of bone atrophy and BIC all affect the displacement and micro-strain on the mandible bone. Preoperative finite element analysis could offer improved predictability in the long-term outlook of dental implant restorations.
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