مقارنة الانطباق الحفافي للقبعات الزركوني المنصعة بطريقة CAM/ CAD و Slip-cast : دراسة سريرية ومخبرية

الموضوعات

طب

روابط وملفات

التعريف والنوع

رقم الوثيقة

f4d23722-a274-457f-8e9e-6b51cef85d4a

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1958326_1.pdf

بيانات النشر

ترجمة العنوان

Comparison the marginal fit of zirconium coping fabricated by CAD\CAM and Slip-cast techniques In-Vivo and In Vitro studies

ألقاب المؤلفين

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اللغة

Arabic

المصدر والدورية

اسم المصدر

مقارنة الانطباق الحفافي للقبعات الزركوني المنصعة بطريقة CAM/ CAD و Slip-cast : دراسة سريرية ومخبرية

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

The failure of fixed is associated with the weakness of marginal fit, which causes the occurrence of caries and progression of periodontal disease. For this, it was recently noted that there are serious rapids trials to develop dental materials in general, including the materials used in the especially. As a result of this development, some ceramic systems have been appeared, which restored confidence in this type of restoration, and gave a wonderful and practical clinical result. The most important was the system of by CAD-CAM technique or manual technique (Slip-cast). Replica technique remains most commonly used technique for measuring the marginal fit in the medical literature, the silicone rubber considered most accurate and least changing dimensions.Aim of study:It is to compare marginal fit of Zirconium posteriors bridges CAD/CAM and Slip-Cast clinical and laboratory study. In addition, it is the accuracy and simplicity of modified replica technique and traditional replica technique used to measure marginal fit of zirconium posterior bridges manufactured by CAD\CAM. In-Vitro Study:After removal of first lower molar from TYPODENT (Frasco, , Germany), the second lower molar and premolar adjacent were prepared commensurate with full ceramic restoration. Final impression of this bridge was taken by silicone rubber additional(Zhermack Elite HD+) with the aid of custom tray. The impression was condensed with amalgam to make the main metal cast. Fifteen trays were used for fabricate fifteen impressions of main metal cast. Each impression was poured twice to got 30 gypsum cast, that were used for manufactured 15 zirconium bridges by CAD\CAM technique and 15 zirconium bridges by slip-cast technique according to the manufacturer's instructions. The silicone rubber addition low viscosity was injected inside the bridge, and the bridge was put on its gypsum cast and was the figure pressure still the rubber was taken. The rubber thickness was treated by developed replica technique. The rubber thickness of the molar was divided to 8 sections and the premolar was divided to 4 sections. The marginal fit was evaluated by measuring this rubber thickness by used the optical microscope (OLYMPUS OPTICAL CO. LTD, Japan). The marginal fit for each section has assessed by measuring the absolute marginal discrepancy.In-Vitro Study 2 : Fifteen trays were used for fabricate fifteen impressions of the same main metal cast, these impressions were used for fabricate 15 zirconium bridges by CAD\CAM technique According to the manufacturer's instructions. Tow rubber thicknesses were taken for the marginal fit of each bridge its cast gypsum by used light silicone rubber additional. Then the first rubber thickness was treated by developed replica technique to form the Group (A) of the study and the second rubber thickness was treated by replica technique to form the group (B) of the study. The marginal fit was evaluated by the same previous methods.In-Vivo Study: The sample consists of 42 posterior zirconium bridges were fitted in 39 patients ( 20 male and 19 female range: 19-48). The bridges have been divided after manufacturing according to the manufacturing techniques ( I CAD/CAM technique.In vitro study 2:the marginal fit for group of developed replica technique was 14.20 μ, therefore, marginal fit for group of traditional replica technique was 14.40.Depending on T-test (P> 0.05), no significant two techniques was detected.In vivo study:the marginal fit for CAD/CAM groups was 31.17μ and 17.58μ for Slip-Cast techniques. marginal fit of Slip-Cast techniques was significantly better than CAD/CAM techniques in vitro and study.And we conclude that developed replica technique reliable technique to study and measure the marginal gap of bridge and crown, and it is statistically more accurate than the traditional technique.

كلمات الباحثين

CAD, FDP, Marginal, Zirconium, الترميمات الخزفية الخالية من المعدن, الجسور الزبركونية, الزيروكونيا

إشراف وإعداد

الإشراف

اياد سويد

الإعداد

ماهر قصبة

الاقتباسات الببليوغرافية