تأثير سماكة القلوب الزيركونية المصنعة بطريقة ال CAM-CAD في مقاومة التيجان للكسر : دراسة مخبرية
Other Title(s)
The inflence of the thickness of zirconia core made by CAD-CAM on the fracture resistance of crowns : in vitro study
Author
Source
Issue
Vol. 30, Issue 2 (31 Dec. 2014), pp.413-422, 10 p.
Publisher
Publication Date
2014-12-31
Country of Publication
Syria
No. of Pages
10
Main Subjects
Abstract EN
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.
Materials & Methods: An acrylic tooth(shape of a lower molar)was prepared to receive full crown with a chamfer finish line(1mm).then we copied it into 24 metal replicas, then 24 ceramic crowns with Y-TZP Zirconia core were made, divided into two groups, (E4)12 crowns with 0.4 mm in core thickness,(E6)12 crowns with 0.6 mm in core thickness using Zirkodenta system of CAD/CAM.
We veneer the crowns with 1 mm thickness of IPS emaxZirpress, we cemented the crowns with GIC, every abutment was placed into an acrylic base with a rubber layer.
Fracture test was conducted applying a vertical force on the center of the occlusal surface using the general mechanical testing machine at the speed of 0.5 mm/min to the point of fracture, and the forces were recorded in N.
The statistical analyses was conducted using T-student,Q2 .
Then occurrence of the patterns of failure was studied p>0.05.
Results: The mean value of the fracture force in group (E4) was 2115.33 N, and the 2855.67 N in group (E6).
After the statistical study it was concluded that no significant differences between the two means were present, p>0.05.three patterns of failure were recorded, and no significant differences between them were present.
Conclusions: There is no difference in fracture resistance between the core with 0.4mm thickness and the core with 0.6mm thickness in the crown made by CAD/CAM.
American Psychological Association (APA)
العكاري، ديما. 2014. تأثير سماكة القلوب الزيركونية المصنعة بطريقة ال CAM-CAD في مقاومة التيجان للكسر : دراسة مخبرية. مجلة جامعة دمشق للعلوم الطبية،مج. 30، ع. 2، ص ص. 413-422.
https://search.emarefa.net/detail/BIM-743409
Modern Language Association (MLA)
العكاري، ديما. تأثير سماكة القلوب الزيركونية المصنعة بطريقة ال CAM-CAD في مقاومة التيجان للكسر : دراسة مخبرية. مجلة جامعة دمشق للعلوم الطبية مج. 30، ع. 2 (2014)، ص ص. 413-422.
https://search.emarefa.net/detail/BIM-743409
American Medical Association (AMA)
العكاري، ديما. تأثير سماكة القلوب الزيركونية المصنعة بطريقة ال CAM-CAD في مقاومة التيجان للكسر : دراسة مخبرية. مجلة جامعة دمشق للعلوم الطبية. 2014. مج. 30، ع. 2، ص ص. 413-422.
https://search.emarefa.net/detail/BIM-743409
Data Type
Journal Articles
Language
Arabic
Notes
يتضمن مراجع ببليوجرافية : ص. 421-422
Record ID
BIM-743409