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Mathematisch-Naturwissenschaftliche Fakultät - Jahrgang 2011


Titel Computational Simulation of Trabecular Bone Distribution around Dental Implants and the Influence of Abutment Design on the Bone Reaction for Implant-Supported Fixed Prosthesis
Autor Istabrak Hasan
Publikationsform Dissertation
Abstract Computational modelling of trabecular bone distribution based on the remodelling process is a challenging issue. Up to now, most of bone remodelling models attempted to describe the remodelling process with noncemented implants of the hip joint. Few studies are published about remodelling processes around dental implants.
This work presents a computational simulation of bone remodelling around dental implants from a biomechanical point of view. The model is based on the stimulation of bone remodelling by a local mechanical stimulus. Furthermore, this study investigates the reaction of the bone to different prosthetic abutment designs that are commonly used for implant-supported fixed prosthesis.
The first part includes the investigation of the influence of abutment design on the bone behaviour at the cervical region of the implants that are used for implant-supported fixed prosthesis. The investigations cover three aspects: Experimental, numerical, and clinical. The experimental part deals with measuring the magnitude of implant micromotion in relation to the abutment design. The numerical part analyses the distribution of stresses and strains and their relation to the abutment design. The clinical part represents the final step for the validation of the experimental and numerical results. The probing depth is measured up to one-year after the placement of the abutments.
The second part of the presented study deals with testing the sensitivity of the applied remodelling model to different mechanical conditions, e.g. varying boundary conditions, loading conditions, material properties, etc.
The third part of this work deals with the simulation of remodelling processes during the healing phase by considering three healing intervals and different tissue layers by means of different mechanical properties at the bone-implant interface.
In conclusion, this work demonstrates, in its first half, the reaction of the bone to the load distribution created by different abutment designs in implantsupported fixed prosthesis. In its second half, the present word describes a computational simulation of trabecular structure around dental implants based on the change of the apparent bone density as a function of the mechanical daily stimulus.
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© Universitäts- und Landesbibliothek Bonn | Veröffentlicht: 30.09.2011