پديد آورنده :
طالبي، سعيد
عنوان :
بررسي تاثير نوع اتصال و ارتفاع تاج دندان در توزيع تنش استخوان اطراف ايمپلنت
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
طراحي كاربردي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
بيست، 100ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
محمود فرزين
توصيفگر ها :
آناليز اجزامحدود , اتچمنت , اوردنچر
تاريخ نمايه سازي :
20/8/91
استاد داور :
محمدرضا فروزان،مهران مرادي
تاريخ ورود اطلاعات :
1396/09/21
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Effect of Attachment Types and Occlusal Plane Heights on Stress Distribution around Dental Implants in Mandibular Overdentures Saeid Talebi s talebi@me iut ac ir Date of Submission 27 June 2012 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Mahmoud Farzin farzin@cc iut ac ir Abstract Implant retained mandibular overdenture presents a reliable and simple solution to denture retention and stability The retention and stability characteristics are provided mainly by implants through attachments So in this study various types of attachment systems have been used for connecting implant retained mandibular overdentures to underlying implants Available restorative space is an important factor in stress distribution of implant supported overdentures The purpose of this study was to evaluate the effect of different vertical restorative space different bar height in bar and clip attachment and different collar heights in ball attachment on the stress distribution around implants In this in vitro study the model of 2 implant supported overdenture with four different attachments bar and clip ball locatorand bar ball on an acrylic edentulous mandibular arch was used Four different bar height 0 5 1 1 5 2 mm in bar and clip attachment and three different collar height 1 2 3 mm in ball attachment with 15mm occlusal plane height and three different occlusal plane height 9 12 15mm were modeled Vertical unilateral and bilateral load of 150N was applied to the central occlusal fossa of the first molar and the stress of bone around implant was analysed by finite element analysis By increasing vertical restorative space the maximum stress values around implants were decreased in unilateral loading models but slightly changed in bilateral loading cases By increasing bar height the maximum stress values around implants were increased in unilateral loading models but slightly decreased in bilateral loading cases By decreasing of first lever arm distance of crestal bone to abutment in unsplinted resilient attachments stresses generated in bone are decreased and by increasing second lever arm distance of occlusal plane to abutment stresses in bone was decreased Locator attachments generated more stresses than the other ettachments and ball attachment generated the lowest stress in the same crown height space CHS Most edentulous patients asking for implant retained overdenture complain from retention and stability of their complete denture due to sever residual ridge resorption Sever residual ridge resorption contributes to more vertical restorative space Based on the findings of this study it would be biomechanically favorable for these patients if the bar height is reduced and overdentures acrylic resin thickness is increased to consequently reduce periimplant bone resorption Keywords finite element analysis implant attachment overdenture stressPDF created with pdfFactory trial version www pdffactory com
استاد راهنما :
محمود فرزين
استاد داور :
محمدرضا فروزان،مهران مرادي
