Hussein, S., Laithy, A. (2019). Effect of Root Canal Geometry Versus Different Coronal Restorations on the Strength of Endodontically Treated Teeth. test, 65(Issue 1 - January (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)), 439-443. doi: 10.21608/edj.2019.72719
Shady Ali Hussein; Ahmed A. Laithy. "Effect of Root Canal Geometry Versus Different Coronal Restorations on the Strength of Endodontically Treated Teeth". test, 65, Issue 1 - January (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), 2019, 439-443. doi: 10.21608/edj.2019.72719
Hussein, S., Laithy, A. (2019). 'Effect of Root Canal Geometry Versus Different Coronal Restorations on the Strength of Endodontically Treated Teeth', test, 65(Issue 1 - January (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)), pp. 439-443. doi: 10.21608/edj.2019.72719
Hussein, S., Laithy, A. Effect of Root Canal Geometry Versus Different Coronal Restorations on the Strength of Endodontically Treated Teeth. test, 2019; 65(Issue 1 - January (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)): 439-443. doi: 10.21608/edj.2019.72719

Effect of Root Canal Geometry Versus Different Coronal Restorations on the Strength of Endodontically Treated Teeth

Egyptian Dental Journal
Article 9, Volume 65, Issue 1 - January (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), January 2019, Pages 439-443    PDF (212.08 K)
Document Type: Original Article
DOI: 10.21608/edj.2019.72719
Authors
Shady Ali Hussein1; Ahmed A. Laithy2
1Lecturer at Endodontic Department, Faculty of Dentistry Ain Shams University
2Lecturer at Department of operative Dentistry, Faculty of Dentistry Ain Shams University
Abstract
This study aimed to evaluate the combined effect of fiber post in different Root canal tapers. Sixty lower first premolar human extracted teeth had been used in this study, teeth were randomly divided into 3 equal groups (n=20). Group I; where cleaning and shaping was done using Twisted File (TF) #25 taper 0.04. Group II; where cleaning and shaping was done using Twisted File (TF) #25 taper 0.06. Group III; where cleaning and shaping was done using Twisted File (TF) #25 taper 0.08. Each main group was randomly subdivided into 2 equal subgroups (10 each) according to the coronal restoration type. Subgroup A; where coronal cavities were filled with Composite core material Multicore Flow (Ivoclar Vivadent, Schaan, Liechtenstein) (MCF), Subgroup B; where the coronal cavities were restored with fiber reinforced composite posts (FRC) and MCF. The fracture resistance of all groups had been evaluated & analyzed using Two-Way ANOVA. Results showed that 0.08 taper had a significant negative effect on the fracture resistance of teeth with and without post than 0.04 taper while other variants had no any statistically significant effect on the fracture resistance of the tested samples. It has been concluded that, under limitations of this study,  the degree of taper of the root canal preparation only affects mechanical properties of the tooth when it increases more than 0.06 taper, while wether a post is used or not  is of no use in class I conservative access cavity preparation of lower first premolar teeth.   
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