A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
Background and Objective: Dental implants, as one of the most frequently used medical prostheses, are widely utilized as a replacement for the lost teeth in dentistry, which can provide the patients with comfort and utility in mastication and digestion purposes. However, there is a demanding require...
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Elsevier
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/a11de0c6004f46ce8b68e738eeb83a67 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | Background and Objective: Dental implants, as one of the most frequently used medical prostheses, are widely utilized as a replacement for the lost teeth in dentistry, which can provide the patients with comfort and utility in mastication and digestion purposes. However, there is a demanding requirement for the implant mechanical quality improvements carried out by optimizing the implant size and material characteristics. The improvements made to the design variables of a dental implant can benefit the supporting bone viability and reduce the risk of bone injury and loosening implants. Therefore, the purpose of the present finite element-based study was to optimize the design variables of an implant screw in a geometrically developed implant-mandible assembly for minimizing the resultant difference of the maximum equivalent strain value in the mandible to an as possible admissible, safe limit compared with pre-implantation state, based on the Mechanostat Theory. The usage of the Mechanostat Theory as the criterion for which the difference of mandible maximum equivalent strain value after implantation was considered as an objective function to be minimized from before-implantation state, was newly addressed in this study. Methods: In order to form the 3D geometry of the mandible, a patient-specific CT image dataset was used, and a 3D model of a dental implant with relevant parts was extracted based on a literature design, after which the assembly of the mandible and implant was imported to a finite element software to analyze the biomechanical behavior of the mandible bone under a mechanical pressure load exerted on the implant crown, as the mastication equivalence. The same procedure was conducted for importing the 2nd premolar tooth geometry with the same boundary conditions of the mandible to compare the results. Results: The results indicated that there was 50.2% decline in the maximum equivalent strain difference from 44.2 με to 22.2 με as the consequence of the optimized sizes of the implant screw length and radius. Furthermore, there was a sensible amount of sensitivity for the maximum equivalent strain to the alterations in the screw radius rather than length. Conclusions: Finally, the proposed, optimized geometry for the implant screw improved the baseline design and provided a useful basis for further research. |
|---|