Design optimization of a radial functionally graded dental implant
| Autor: | Jennifer J. Bazen, Wei Yi, Xiaozhi Hu, Paul Ichim |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
medicine.medical_treatment Composite number Biomedical Engineering Dentistry 02 engineering and technology engineering.material Biomaterials 03 medical and health sciences 0302 clinical medicine stomatognathic system Coating Ultimate tensile strength medicine Cubic zirconia Composite material Dental implant Porosity Elastic modulus business.industry 030206 dentistry Stress shielding 021001 nanoscience & nanotechnology engineering 0210 nano-technology business |
| Zdroj: | Journal of Biomedical Materials Research Part B: Applied Biomaterials. 104:58-66 |
| ISSN: | 1552-4973 |
| DOI: | 10.1002/jbm.b.33345 |
| Popis: | In this work, we use FEA to test the hypothesis that a low-modulus coating of a cylindrical zirconia dental implant would reduce the stresses in the peri-implant bone and we use design optimization and the rule of mixture to estimate the elastic modulus and the porosity of the coating that provides optimal stress shielding. We show that a low-modulus coating of a dental implant significantly reduces the maximum stresses in the peri-implant bone without affecting the average stresses thus creating a potentially favorable biomechanical environment. Our results suggest that a resilient coating is capable of reducing the maximum compressive and tensile stresses in the peri-implant bone by up to 50% and the average stresses in the peri-implant bone by up to 15%. We further show that a transitional gradient between the high-modulus core and the low-modulus coating is not necessary and for a considered zirconia/HA composite the optimal thickness of the coating is 100 µ with its optimal elastic at the lowest value considered of 45 GPa. |
| Databáze: | OpenAIRE |
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