The impact of different root canal preparation sizes and tapers on fracture strength of roots | ||||
| Egyptian Dental Journal | ||||
| Article 6, Volume 68, Issue 3 - Serial Number 5, July 2022, Page 2805-2812 PDF (685.95 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2022.127781.2026 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Mohammed Turky 1; Reem Gamal  2
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| 1Department of Endodontics, Faculty of Dentistry, Minia University, Egypt | ||||
| 2Department of Biomaterials, Faculty of Dentistry, Minia University, Egypt | ||||
| Abstract | ||||
| Abstract Introduction: The purpose of the study was to investigate the impact of root canal preparation with different sizes and tapers on fracture strength of roots. Methods: A total of 42 freshly extracted intact human permanent mandibular premolars. Teeth were randomly divided into 7 groups I-VII (n =6): un-instrumented root canals (control), 25/0.04, 25/0.06, 30/0.04, 30/0.06, 35/0.04and 35/0.06 respectively. K3XF rotary files (Kerr Endodontics, Orange, CA) were used for canal instrumentation with distilled water irrigation. Fracture strength was tested using a universal test machine. Results: Group I (control) had the highest statistically significant mean compared with the experimental groups II-VII. The means and standard deviation for groups I-VII were 1022.08±87.61, 819.29±97.11, 691.63±82.39, 719.14±102.58, 668.60±185.20, 669.32±130.63 and 669.32±130.63, respectively. Conclusion: Under the conditions of the present study, we can conclude that increasing preparation size and taper up to 35/0.06 did not affect the fracture strength of roots. Instrumentation of mandibular premolars up to 35/0.06 did not affect their fracture strength. | ||||
| Keywords | ||||
| Fracture strength; fracture resistance; apical preparation size; apical preparation diameter; taper | ||||
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