Author: Rudi Cobus Van Staden
Publisher:
ISBN:
Category : Dental implants
Languages : en
Pages :

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Book Description
Abstract : Development of an ideal substitute for missing teeth has been a major aim of dental practitioners for millennia. Modern dental implants are biocompatible screw-like titanium {u2018}fixtures{u2019} that are surgically placed into the jaws to replace missing teeth. Implants are superior to conventional prostheses, in both function and long-term predictability. In 2006 approximately 30,000 implants were placed in Australian patients. Implant sales have doubled in the last 5 years and are increasing by about 15% per year. Although implants exhibit excellent long-term retention (~95% after 5 years), there are significantly more failures in areas where bone quality and quantity is poor, resulting in poor patient outcomes and costs estimated at $15 million per year in Australia. Most failures arise from poor clinical technique and inadequate understanding of the potentially damaging stress characteristics during implant placement and function (chewing). Three-dimensional (3D) Finite Element Analysis (FEA) is a numerical method for analysing stresses and deformations in structures of any given geometry and under any load. There are reports on utilising 3D FEA to investigate implant-jawbone interactions after full osseointegration. However no work has been done to comprehensively quantify the performance of the bone-implant system during and after implantation. This research thus aims to develop a comprehensive FEA technique to evaluate the performance of the bone-implant system during the implantation process itself, as well as the healing and maintenance phases of osseointegration.

Author: Jianping Geng
Publisher: Springer Science & Business Media
ISBN: 3540737642
Category : Technology & Engineering
Languages : en
Pages : 148

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Book Description
This book creates the theoretical foundation that novices need to perform the finite element method in implant dentistry. It shows how both the implant dentist and the designer can benefit from finite element analysis. The authors explain the theory and math of the finite element method. Then, you get practical applications alongside discussions of the critical issues in using finite element analysis for dental implant design.

Author: Liangjian Chen
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :

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Book Description
Finite Element Analysis of the Stress on the Implant-Bone Interface of Dental Implants with Different Structures.

Author: S. Nemat-Nasser
Publisher: Cambridge University Press
ISBN: 9780521839792
Category : Mathematics
Languages : en
Pages : 858

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Book Description
Publisher Description

Author: Timothy James Sego
Publisher:
ISBN:
Category :
Languages : en
Pages : 170

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Book Description
Finite element analysis (FEA) in implantology is performed in design applications concerning the complex topology of an implant, according to theoretical assumptions about and clinical data concerning the biomechanical nature of skeletal tissue. Implants are placed in topologically and physiologically complex sites, and major disagreement exists in literature about various aspects concerning their modeling and analysis. Current research seeks to improve the implementation of an implant by the use of short implants, which negate the necessity of additional surgical procedures in regions of limited bone height. However, short implants with large crown heights introduce biomechanical complications associated with increased stress and strain distributions in skeletal tissue, which may cause bone loss and implant failure. The short implant is characterized by the geometric ratio of the crown height to the implant length, called the crown-to-implant (C/I) ratio. In this work nonlinear FEA was performed to investigate the effects and significance of the C/I ratio on long-term implant stability. A finite element model was developed according to literature, and emulation of previous research and comparison of reported results were performed. Comparison of results demonstrated significant sources of error in previous research, which are argued to be caused by mesh-dependency from common model idealizations in literature. A convergence test was then performed, which verified the mesh-dependency of results and challenged the reliability of some common model assumptions and methods of analysis in literature. A 16-point design of experiments was then performed to evaluate the significance and influence of the C/I ratio, considering a proposed novel method for evaluating results and predicting long-term stability. Analysis of results demonstrated that the C/I ratio augments the inherent biomechanical effects of an implant design, particularly overloading strain concentrations at implant interface features. The use of short implants with high C/I ratios is determined to be inadvisable, considering the physiological response of tissue to strain distributions and biological context. A novel, multiscale material model is then proposed to describe the short-term accumulation of damage and biomechanical remodeling response in orthotropic skeletal tissue, as a potential solution to the mesh-dependency of results.

Author: George A. Papavasiliou
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 232

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Book Description

Author: Hélène Vaillancourt
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780315928350
Category :
Languages : en
Pages : 372

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Book Description

Author: 耿建平
Publisher:
ISBN: 9787308055109
Category : Biomedical materials
Languages : en
Pages : 137

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Book Description
Part of the new series, Advanced Topics in Science and Technology in China, this book is designed to give the necessary theoretical foundation to new users of the finite element method in implant dentistry, and show how both the implant dentist and designer can benefit from finite element analysis. The first part deals with the theory of the finite element method. containing the necessary mathematical theory but written so that readers from a dental background can easily understand. Then basic knowledge of implant dentistry is introduced to readers from an engineering background. Next, dental.

Author: M. Jane Morgan
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN:
Category : Osseointegrated dental implants
Languages : en
Pages : 406

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Book Description

Author: Ryan Shannon
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Stresses and strain in the bone surrounding a dental implant are of interest regarding the study of bone healing following the dental implantation procedure. Techniques for mapping strain in bone have been developed for physical experimentation, but computational methods for finding these strain maps are more desirable for their flexibility in dealing with changing physical properties, loading conditions, and geometries.This project first aims to develop a finite element model of a surgical dental implant and two adjacent teeth. Two implants from a cadaver are scanned by a micro-CT scanner and those images are used to create two models. The first is an implant for tooth 23 and the second for tooth 26. After building the model, the implant is loaded with a pressure and the resultant stress and strain in the teeth and surrounding bone are calculated using the finite element method. The effects of element size are studied. Various boundary conditions are explored. The parameters of the model are then modified to simulate various conditions including differences in the stiffness of the cortical bone, the teeth dentin, and the titanium implant. These differences in material properties arise from an interval of stiffness values in the literature for bone and teeth, and the unknown composition of the implant.The computational model is compared to a physical experiment during which the same implants were loaded by a downward force of 100 N. In the experiment, the implant-tooth complexes were scanned again after loading, and digital volume correlation methods were measured to calculate the strain [1]. The goal for this project is to evaluate the finite element method as a means for studying the mechanical effects of loaded implants in the surrounding bone. The methods developed in this project might be used in future studies of implant-bone complexes.