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Abstract
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تقييم بعض الخواص الميكانيكية والفيزيائية لحشوات الزجاج الأيوني المعدلة بإضافة جسيمات النانوزركونيا
بحث مقدم كجزء من مقومات الحصول علي درجه الماجستير في علم المواد الحيوية لطب الأسنان
مقدمة
الطبيب/ ظافرعبدالواسع قاسم الشيباني
بكالوريوس طب وجراحه الفم والأسنان جامعة فولجا جراد- روسيا (2004)
تحت إشراف
محمد صلاح عبدالعزيز ناصف .أ0 م0 د
أستاذ مساعد المواد الحيوية
قسم المواد الحيوية
كليه طب الأسنان
جامعه عين شمس
دينا أحمد الرفاعي.أ0م0د
أستاذ مساعد المواد الحيوية
قسم المواد الحيوية
كليه طب الأسنان
جامعه عين شمس
كليه طب الأسنان
جامعه عين شمس 2017
الملخص العربي
المقدمة
تستخدم الحشوات الزجاجية كحشو دائم ومؤقت في حين انه يعاني من الكثير من العيوب مثل الكسر والانثناء والذوبان
وقد اجريت أبحاث عديدة لتحسين هذه الصفات ففي دراسات سابقه تم أضافه جسيمات الزركونيا إلي الحشوات الزجاجية لتحسين الصفات الميكانيكية وفي هذه الدراسة تمت
أضافه نسب مختلفة من نانوجسيمات الزركونيا 3% و5% و7% الي الحشوات
الزجاجية ودراسة تأثير هذه الإضافة علي عدة صفات ميكانيكية وفيزيائية0
الغرض من البحث
هذة الدراسة وجهت لأستنباط تأثير إضافة نانوجسيمات الزركونيا علي بعض الصفات الميكانيكية والفيزيائية للحشوات الزجاجية0
المواد المستخدمة وطرق البحث
هذة الدراسة استخدمت نانوجسيمات الزركونيا والجسيمات العادية التقليدية من الحشوات الزجاجية وتم اضافه نانوجسيمات الزركونيا بنسب مختلفه هي 3% و 5% و 7% 0 وتم اختبار هذه المواد من حيث :
1-قياس مقدار مقاومة قوة الانثناء المصغرة لهذة العينات ومقارنتها بعينات مماثلة خالية من الجسيمات الموضوعة
2-قياس مقدار مقاومة قوة الضغط لهذة العينات ومقارنتها بعينات مماثلة خالية من الجسيمات الموضوعة
3-قياس مقدار صلابة السطح لهذة العينات ومقارنتها بعينات مماثلة خالية من الجسيمات الموضوعة
4- قياس مقدار امتصاص الماء لهذة العينات ومقارنتها بعينات مماثلة من الجسيمات الموضوعة
5- قياس ذوبان هذه العينات في الماء ومقارنتها بعينات مماثلة خالية من الجسيمات الموضوعة 0
وقد تم عمل اربعه قوالب من التفلون مختلفة الابعاد لقياس هذة الخواص0
تم قياس هذة الخواص بأستخدام جهاز قياس خواص الميكانيكية لمواد طب الأسنان وميزان الكتروني0
الأستنتاج
وقد أظهرت نتائج هذه الدراسة مايلي :
01 الحشوات الزجاجية الايونية التي تمت اضافتها بنسبة 3% و 5% من جسيمات نانو الزركونيا حسنت الخواص الميكانيكية (مقاومة قوة الانثناء المصغر, مقاومه الضغط و صلابة السطح) والخواص الفيزيائية ( الامتصاص والذوبان)0
02 من ناحيه اخري اظهرت هذه الدراسة ان الحشوات الزجاجية الأيونية التي احتوت علي نسبة 7% من جسيمات نانو الزركونيا لم تضف اي تحسين في الخواص الميكانيكية والفيزيائية0