Mirrored: 18th of March 2010, 22:31 Original: nctur.lib.nctu.edu.tw Views: 56 Settings: Loading the mirror...
DSpace Search DSpace NCTU Institutional Repository > _________ ********* > [ Go ] ****************** > Advanced ME *************** > Search - Please use this identifier to cite or link to this item: http://nctur.lib.nctu.edu.tw/handle/987654321/5889 Home Title: ************************************************************************ Browse Other Influence of Thread Forms and Misfit on Dental Implant: A Finite Element Analysis Communities Titles: & Collections ********* Issue Date Authors: Ray-Quan Hsu Author ********* Title Shih-Chun Tseng Subject ****** ****** ****** ****** ****** ****** ****** Keywords: ************ thread forms Help misfit About DSpace implant dental finite element Issue Date: 18-Sep-2009 **********************************************************************************************************************************************************************._ **********************************************************************************************************************._***************************************,_************,_************************._******************************************************,_***************************************************************._***********************************************20MPa***********************0.3*******************************************************************************************************._ *****************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************._ Abstract: ********************************************************************************************************************._****************************************************************************************************************************************************._*************************************************************************************************************._ The purpose of this study was to investigate the stress and the stain distribution around implants and alveolar bones and to determine the best thread form and misfit of implants and alveolar bones which promote osseointergration. An axial symmetric finite element models were adopted for simulate four implant threads, the thread forms of ISO thread, whitworth thread, square thread, and buttress thread. Three misfits between implants and alveolar bones were considered. The conditions of implant with no misfit in alveolar bones, implant with misfit in alveolar bones, and implant with perfect osseointergration in alveolar bones. Each implants was applied with a pressure of 20 MPa in vertical direction. The static friction coefficient between implant and alveolar bones was selected 0.3. Experiments with dental stone as the alveolar bone and Ti implant were carried out to verify the finite element analysis results. Base on the simulate results, square thread has maximum stress and the highest disuse window and higher pathologic overload zone. Buttress thread has maximum stress areas and the highest pathologic overload zone. There is no discernible difference between ISO thread and whitworth thread. But whitworth thread has lowest maximum stress and highest mild overload zone at the condition of implant with misfit in alveolar bones. It is found that ISO thread and whitworth thread are better in terms of promoting osseointergration. The best condition for osteointergration is whitworth thread implant with misfit in alveolar bones. ****** Description: ****************** ****************** URI: http://etd.lib.nctu.edu.tw/cgi-bin/gs/tugsweb.cgi?o=dnctucdr&i=sGT009414515.id http://nctur.lib.nctu.edu.tw/handle/987654321/5889 Appears in ME *************** Collections: Files in This Item: File Description Size Format download.html 307 B HTML View/Open [ Show full item record ] Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Valid XHTML 1.0! DSpace Software Copyright (c) 2002-2009 The DSpace Foundation - Feedback sitemap ***NCTU IR***************************************************._ *************************** [******] 30010 ******************1001*** [******] 03-5712121*52636,_52650