Fracture Resistance of Endodontically Treated Mandibular Molars Restored With Two Endocrown Designs (An In-Vitro Study) | ||||
| Egyptian Dental Journal | ||||
| Article 20, Volume 65, Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), October 2019, Page 3745-3750 PDF (713.76 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2019.76020 | ||||
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| Authors | ||||
| A. K. Abo El Fadl1; T. M. Elsewify2 | ||||
| 1Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt; Guest Researcher, Oral Technology Department, Bonn, Germany | ||||
| 2Department of Endodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt | ||||
| Abstract | ||||
| Aim: To evaluate the effect of two endocrown designs on the fracture resistance of endodontically treated mandibular molars. Materials and methods: Fourteen mandibular molars were endodontically treated and randomly divided into two groups according to the endocrown design; group (A) Axial extension (n=7) and group (B) Circumferential extension (n=7). Endocrown preparation was done followed by CAD/CAM endocowns design and fabrication using lithium disilicate glass ceramics. Endocrowns were cemented using a standardized protocol. All samples were subjected to fracture resistance test using a universal testing machine and the maximum loaded was recorded. Statistical analysis was performed using One-Way ANOVA and significance level was set at 0.05. Results: Endodontically treated mandibular molars with axial extension endocrowns showed significantly higher fracture resistance than those with circumferential extension. Conclusions: Axial extension endocrown design is recommended to restore endodontically treated mandibular molars. | ||||
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