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Register a new userالمدعومة بالزرعات باستخدام طريقة العناصر المنتهية 33 Study the effect of alveolar ridge shape on stress distribution in mandibular removable partial implant – supported dentures using a finite element method.
دراسة تأثير شكل الحافة السنخية في توزع الإجهاد في الأجهزة الجزئية السفلية المتحركة المدعومة بالزرعات باستخدام طريقة العناصر المنتهية
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Aِl-Baath University ورقة بحثية
Publication date
2017
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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يهدف البحث إلى دراسة تأثير شكل الحافة السنخية في توزع الإجهاد عند دعم الأجهزة الجزئية السفلية المتحركة بالزرعات بطريقة العناصر المنتهية، حيث تم تصميم أربعة نماذج لنصف فك سفلي ذو فقد خلفي حر باستخدام برنامج ANSYS اعتمد الناب فيها كدعامة ، و تمثل فيها الحافة المتبقية أشكال الحافة السنخية الأربع (الأفقية و الهابطة وحشياً و المقعرة و الصاعدة وحشياً)، تم تصميم جهازين لكل نموذج الأول مدعوم بالسن و المخاطية الفموية و الثاني مدعوم بالسن و الزرعة، تم تطبيق قوة مقدارها 50 نيوتن على كل النماذج و تمت دراسة الإجهاد المكافئ لكل نموذج.
This study aims to investigate the effect of the alveolar ridge shape in the distribution of stress at the lower removable partial dentures supported by implants using a finite element method, with four models for a half mandible are designed with a free end saddle using an ANSYS program and Canine was abutment, where the remaining ridge is representing the four alveolar ridge shapes (horizontal and distal descending and concave and distal ascending), two removable partial dentures were designed for each model one supported by tooth and fibromucosa and another one supported by tooth and implant, it has been applied a load of 50 Newton on all models and has been studied stress equivalent for each model.
References used
Manoel M. Junior, Rodolfo B. Anchieta, Eduardo P. Rocha, Joao A. Pereira, Carlos M. Archangelo1, Amilcar C. Freitas- Junior, Erika O. Almeida. (2011). the influence of the alveolar ridge shape on the stress distribution in a free-end saddle removable partial denture supported by implant, Acta Odontol. Latinoam
Mundi. (1963). Protesis parcial removible. Rebossio AD. 3rd ed. Ed
Dubravka KnezoviE-ZlatariE. (2002). Resorptive changes of maxillary and mandibular bone structures in removable denture wearers, Acta Stomat Croat
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The initial retention of implant-supported removable partial
dentures(ISRPD) is unknown. the purpose of this in vitro study was
to compare maximum dislodging forces of distal extension
mandibular ISRPD with three different clasp design. a stimulat
ed
class 1 partially edentulous mandible was prepared with two
implant in the first molar regions and two metal ceramic on distal
abutments. Fifteen bilateral distal extension frameworks was
fabricated with three different clasp design (Akers, I bar clasp ,no
clasp),each specimen was subjected to three type of retention
pulls ( main ,unilateral ,posterior pulls) five time with universal
testing machine.
It is necessary when designing removable partial dentures to be fixed,
stable and well supported for improving patient comfort, and decreasing
damages on soft tissues and dental abutments, the alveolar ridge has a
strong influence in planning for
treatment and interpretations
biomechanical when treated with removable partial dentures, and have
four shapes in the sagittal plane which are horizontal shape, concave
shape, distal ascending shape and descending shape.
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3D finite elements analysis study aims to conduct a
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Factors affecting the usage of removable partial dentures (RPDs) are still
controversial. Since the RPD usage is partly related to patients’ personality, variations among different
population is expected. This study aimed to evaluate the factors that influence the RPDs denture usage in
patients of undergraduate students of Damascus University by using telephone call one-year after
delivery.
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