Impact of Marginal Preparation Design on the Fracture Resistance of Endo-Crown All-Ceramic
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2019, Vol 18, Issue 4
Abstract
Objectives: The purpose of this in vitro study was to evaluate the fracture resistance of CAD/CAM zirconia reinforced lithium silicate glass ceramic (Vita suprinity) endo-crownin molars maxillary teeth. Materials and Methods: A total 60 non carious, devitalized human maxillary molars free from cracks were restored with reinforced Vita suprinity used in this study.They were classified into 2main groups in each tooth, 30 specimens each according to the type of restoration and designs of preparation as following. Group I: (n= 30) endodontically treated upper molars with 2mm ferrule and deep chamfer finish line restored with Vita suprinity endo-crown. Group II: (n=30) endodontically treated upper molars restored with butt joint margin Vita suprinity endocrown. The teeth were prepared with a special milling machine and adhesively cemented with dual cure self-adhesive resin cement (Rely X U200).The samples were subjected to 3500 thermocycle. Then eachSpecimen was loadedto a universal testing machine. To failure at a crosshead speed of 0.5 mm / min. Mode of failure was also examined. Data were analyzed using one way analysis of variance (ANOVA) and Tukey’s post hoc significance difference tests. Results:There was no statistically significant difference between Group I and Group II. The highermean fracture resistance was detected among Group I and Group II (624.83 ± 126.04& 557.30±156.80), respectively. Conclusions:Under the conditions of this study.There was no statistically significant difference between tested groups.
Authors and Affiliations
Aymen Mohammed Alamin, Amal Abdelsamad Sakrana, Walid Abd El-Ghafar Al-Zordk
Keywords
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- EP ID EP572070
- DOI 10.9790/0853-1804021117.
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