هدف هذه الدراسة هو اختبار مقاومة الكسر للتيجان ذات القلنسوات المصنعة من الزيركونيا وفق طريقة ال CAD/CAM بسماكتين مختلفتين و معرفة تأثير تقليل سماكة القلنسوة في مقاومة التيجان للكسر، و دراسة أنماط الفشل.
Background& Objective: This study was carried out to test fracture resistance of crowns with Zirconia
core made by CAD/CAM of two thicknesses, and test the influence of decreasing the core thickness on its
fracture resistance, and study the patterns of failure.
References used
Zarone F. ,Russo S., SorrentinoR.From porcelain-fused-to-metal to zirconia: Clinical and experimental considerations . J Dent Mater 2011;27:83-96
Al-AmlehB.,LyonsK.,Swain M. Clinical trials in zirconia: asystematic review. J Oral Rehabil 2010; 37: 641– 652
Hämmerle C,SailerI,Thoma A, Gianni H,Suter A, Ramelc.Dental Ceramics essential Aspects for clinical practice. Quintessence publishing Co.Ltd (2008).p:2-5,9,16,20,21,39,86
several factors should be considerate when
fabricating zirconia-based crowns to achieve maximum shade
symmetry with adjacent natural teeth. Abutment color is one of the
before most important factors due to its effect on the final restoration
ceme
Replica technique remain most commonly used technique for
measuring the marginal fit in the medical literature, the silicone
rubber addition is considered most accurate and least changing
dimensions.
Aim of study to compare the accuracy and simpl
Porcelain has a long history of fixed prosthodontics to achieve optimum beauty by color. However, there is a lack of information on how the color of different thicknesses of ivory porcelain is affected by repeated exposure to baking.
Porcelain is used in thin thicknesses to fabricate ceramic
veneers. The low fusing feldspathic porcelain used to fabricate porcelain
veneers is easily fractured, brittle porcelain before cementation to tooth
structure. However, its fracture resist
Recent development in dental materials had led to the fabrication of metal free fixed
prosthodontics to improve the mechanical and aesthetic properties to restore posterior teeth
depending on many techniques, therefore came the propose of this stud