تقييم توزع الإجهادات علي العظم المحيط بالزراعات وفق تقنية الكل فوق أربعة في الفك السفلي بطريقة تحليل العناصر المنتهية ثلاثي الأبعاد

الموضوعات

طب

روابط وملفات

التعريف والنوع

رقم الوثيقة

eef5d542-fff3-4013-9a9a-029c142edbc9

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1962173_1.pdf

بيانات النشر

ترجمة العنوان

Evaluation of Stresses Distribution on Peri-implant Bone with All-on-4 Concept in The Mandible By Finite Elements Analysis

ألقاب المؤلفين

[{"name_ar":"محمد أيهم درويش","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"محي الدين علي عمام","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"منير حرفوش","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

Arabic

المصدر والدورية

اسم المصدر

تقييم توزع الإجهادات علي العظم المحيط بالزراعات وفق تقنية الكل فوق أربعة في الفك السفلي بطريقة تحليل العناصر المنتهية ثلاثي الأبعاد

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

Introduction :One of the challenges for the dentist is to make a prosthesis for the edentulous mandible , despite the presence of the removable full dentures and the removable over dentures, but the fixed prostheses are the most acceptable for the patients, and it needs anterior and posterior implants, but the anatomical limitations and the bone absorption are challenging factors in making these prostheses, so the "All-on-Four" concept has shown to reduce the prostheses’ cost and simplifies the surgical procedures, as it provides full and fixed prosthesis for the mandible based on only four implants, and this prosthesis is considered one of the controversial subjects because of the different opinions in implants length, tilting the prosthesis’ distal implants and the prosthesis’ cantilever length .Aim of study:: 3D Finite Elements Analysis study aims to conduct a biomechanical comparison between two cantilever’s lengths with two different implants 'lengths and different degrees of tilting the implants in an ‘All-On-Four’ prostheses of edentulous mandible by Finite Element Analysis. Materials and Methods: A 3D model of an edentulous mandible was constructed from a CBCT scan, then implant models with its abutments were designed and the four implants were splinted by a CHROME-COBALT bar, (The two posterior implants were tilted at an angle of 30° and 40°, the prosthesis cantilever was given two different variables of 10 mm and 15 mm, the prosthesis implants was given two different variables of 10 mm and 13mmin length). Then the occlusal loading was represented by unilateral molar clench, and the cutting forces were represented by an anterior clench between 146the central incisors. Finally, finite element analysis was performed to obtain stress distribution in the bone that surrounds the implants .Results :All models of "All-on-Four" which have longer cantilever have shown higher stresses compared with the shorter cantilever models, whereas increasing the length of the implantor increasing the tilt of the distal implants does not show clear difference in increasing stresses , however the stresses in all models were concentrated in the cortical bone around the distal implant.Conclusions:"All-on-Four" prostheses which haves horter cantilever have shown minimal stresses, So the tilting of long posterior implants(does not exceed 40 degrees)may decrease the cantilever length , have adequate support in the premolar and molar are as and It does not affect significantly the prosthesis’ failure, thus we get the best of functional and mechanical prostheses

كلمات الباحثين

3D Finite Element, all on 4, cantilever, implants’ dimensions, stress, tilted implants, إجهاد, ابعاد الزرعات, الكل فوق أربعة, تحليل العناصر المنتهية, جناح, زرعات مائلة

إشراف وإعداد

الإشراف

محمد أيهم درويش, منير حرفوش

الإعداد

محي الدين علي عمام

الاقتباسات الببليوغرافية