مقارنة مقاومة انكسار التيجان الخزفية المعدنية ذات السوار المعدني و الحافات الخزفية مخبربا
Other Title(s)
In vitro comparative study of mechanical resist Prof.ance for ceramo-metal crowns with metal collar and porcelain margins
Author
Source
Issue
Vol. 29, Issue 2 (31 Dec. 2013), pp.537-546, 10 p.
Publisher
Publication Date
2013-12-31
Country of Publication
Syria
No. of Pages
10
Main Subjects
Abstract EN
Background & Objective: The idea of use ceramic margins for metal-ceramic crowns was founded to overcome problem of grayness for gingival margins that caused by metal collar in metal-ceramic crowns , but at the same time there are a lot of cautions on decrease mechanical resistance for these restorations.
This study aims to study fracture resistance of metal-ceramic crowns with ceramic margins in 1 or 2 mm.
long, and compare it with mechanical resistance of metal-ceramic crowns with metal collar.
Material& methods: Upper acrylic central incisor was prepared for metal-ceramic crown , then casted with Ni-Cr alloy to get the master die .
45 metal substructures were fabricated and divided in 3 groups.
metal substructures were cut back 1 mm all around margin area in group I and 2 mm in group II , nothing was doing for metal in group III .Building of ceramic crowns were completed , and direct lift technique was used for ceramic margins build-up .The crowns were tested by using a universal testing machine, compression load was applied until ceramic failure occurred .
results were studied statistically using Anova one-way test and Bonferroni test (p>0.05).
Results: Results defined that average load when failure occurred at 500.31 N in group I , 350.54 N in group II , and 559.82 N in group III.
With statistically significant differences between group II and III .
Conclusions : Metal-ceramic crowns with metal collar have the greatest resistance ,while this resistance decreased as well as cutting back from crowns′ metal substructure increased , with average load were applied on metal-ceramic crowns with ceramic margins were stayed between expected forces on front teeth during function.
This thing allow to use these crowns in clinical use especially crowns in group I.
American Psychological Association (APA)
سلوم، كناز عادل. 2013. مقارنة مقاومة انكسار التيجان الخزفية المعدنية ذات السوار المعدني و الحافات الخزفية مخبربا. مجلة جامعة دمشق للعلوم الطبية،مج. 29، ع. 2، ص ص. 537-546.
https://search.emarefa.net/detail/BIM-747048
Modern Language Association (MLA)
سلوم، كناز عادل. مقارنة مقاومة انكسار التيجان الخزفية المعدنية ذات السوار المعدني و الحافات الخزفية مخبربا. مجلة جامعة دمشق للعلوم الطبية مج. 29، ع. 2 (2013)، ص ص. 537-546.
https://search.emarefa.net/detail/BIM-747048
American Medical Association (AMA)
سلوم، كناز عادل. مقارنة مقاومة انكسار التيجان الخزفية المعدنية ذات السوار المعدني و الحافات الخزفية مخبربا. مجلة جامعة دمشق للعلوم الطبية. 2013. مج. 29، ع. 2، ص ص. 537-546.
https://search.emarefa.net/detail/BIM-747048
Data Type
Journal Articles
Language
Arabic
Notes
يتضمن مراجع ببليوجرافية : ص. 545-546
Record ID
BIM-747048