THE EFFECT OF REMAINING CORONAL DENTIN WALL THICKNESS ON FRACTURE RESISTANCE OF ENDODONTICALLY TREATED TEETH RESTORED WITH POST AND CORE | ||||
| Egyptian Dental Journal | ||||
| Article 14, Volume 64, Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), October 2018, Page 3661-3671 PDF (1.15 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2018.79230 | ||||
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| Author | ||||
| Mohamed Mohey Eldin Mohamed | ||||
| Lecturer of Fixed Prosthodontics, Delta University For Science and Technology | ||||
| Abstract | ||||
| Objectives. The aim of this study was to evaluate the effect of the remaining coronal wall thickness of dentin on fracture resistance of endodontically treated anterior tooth restored by cast post and glass fiber post and core. Materials & Methods. A total number of 100 human maxillary central incisors were collected and stored in an isotonic saline solution at room temperature until used. Teeth were randomly divided into 3 main groups control group (CG), group A and B. Control group 20 endodontically treated teeth (ETT) without post and core fabrication restored with full metal crown. Group A, 40 ETT restored by custom made casted metal post and core. Group A, subdivided into subgroup A1, subgroup A2 of 20 ETT and restored with metal crown of 0.5mm and 1.0mm finish line width respectively. Group B, 40 ETT restored by glass fiber post and composite core. Group B, subdivided into subgroup B1, subgroup B2 of 20 ETT and restored with metal crown of 0.5mm and 1.0mm finish line width respectively. The prepared specimens were subjected to load testing using a universal testing machine. The fracture pattern was observed and fracture load results were then statistically analyzed using One-way analysis of variance (ANOVA ) in SPSS software. Results. The highest mean fracture load of 991.5±54.1 N for The control group CG followed by group A1 with a mean of 780.2±67.8 N and group A2with a mean of 521.5± 96.8 N then group B1 with a mean of 489.24 ±30.61 N and the lowest mean fracture load of 388.32± 29.45 N was for group B2. Conclusion. The thickness of remaining coronal dentin affects the fracture resistance of endodontically treated teeth received both casted metal and fiber post and core significantly. | ||||
| Keywords | ||||
| Endodontically treated teeth; Cast post; Fiber posts; Ferrule effect | ||||
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