Publications by authors named "Yew-Chaye Loo"
A finite element study of short dental implants in the posterior maxilla.
Int J Oral Maxillofac Implants
June 2014
Purpose: Elevated bite forces and reduced bone densities and dimensions associated with posterior regions of the maxilla cause relatively high failure rates when short dental implants are placed to substitute missing teeth. This study uses the finite element method to evaluate four distinctly different short implant designs (Bicon, Neodent, Nobel Biocare, and Straumann) for their influences on the von Mises stress characteristics within the posterior maxilla.
Materials And Methods: Finite element models of the supporting bone and tooth crowns are developed based on computed tomography data, and implant geometries are obtained from manufacturers' catalogs.
Article Synopsis
- The study evaluated how various implant and bone parameters affect stress distribution in the mandible using finite element analysis, specifically focusing on maximum compressive stresses and their potential to cause bone fractures under trauma.
- Key parameters included implant diameter and length, the Young's modulus of both cancellous and cortical bone, and bone thickness, with findings showing that masticatory force significantly influences stress differences more than other parameters.
- Ultimately, the research provides insights and practical guidelines for the design of dental implants, particularly highlighting that while cancellous bone may fracture under all parameter combinations during trauma, cortical bone can withstand similar conditions unless influenced by minimum parameter values.
Influence of bone and dental implant parameters on stress distribution in the mandible: a finite element study.
Int J Oral Maxillofac Implants
March 2010
Purpose: The complicated relationships between mandibular bone components and dental implants have attracted the attention of structural mechanics researchers as well as dental practitioners. Using the finite element method, the present study evaluated various bone and implant parameters for their influence on the distribution of von Mises stresses within the mandible.
Materials And Methods: Various parameters were considered, including Young's modulus of cancellous bone, which varies from 1 to 4 GPa, and that of cortical bone, which is between 7 and 20 GPa.
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- The study uses finite element method (FEM) to analyze the dental implant insertion process into the human mandible, aiming to improve dental practices.
- The research evaluates stress profiles in the jawbone during the implantation process, revealing that torque and insertion stages significantly affect these stress profiles.
- The findings lead to a simplified modeling technique that enhances the understanding of the jawbone’s biomechanical reactions and sets the stage for future studies on varied torque levels and improved simulation software.