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CC BY-NC-ND 4.0 · European Journal of General Dentistry 2018; 7(03): 56-60
DOI: 10.4103/ejgd.ejgd_83_18
Original Article

Fracture resistance of the permanent restorations for endodontically treated premolars

Galvin Sim Siang Lin
Department of Oral Diagnosis, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
,
Nik Rozainah Nik Abdul Ghani
Department of Oral Diagnosis, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
1   Department of Conservative Dentistry, School of Dental Sciences, Universiti Sains Malaysia; Department of Dentistry, Hospital Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
,
Tahir Yusuf Noorani
Department of Oral Diagnosis, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
1   Department of Conservative Dentistry, School of Dental Sciences, Universiti Sains Malaysia; Department of Dentistry, Hospital Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
,
Noor Huda Ismail
1   Department of Conservative Dentistry, School of Dental Sciences, Universiti Sains Malaysia; Department of Dentistry, Hospital Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
2   Department of Dentistry, Hospital Universiti Sains Malaysia, Malaysia
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Abstract

Aim: This study aims to compare the fracture strength, fracture pattern, types of fracture involved, and areas of fractured restoration among endodontically treated permanent lower premolars restored with different restorative materials. Materials and Methods: Sixty-nine mature human permanent lower premolars recently extracted for orthodontic, periodontal, or other reasons were selected and divided into three groups (n = 23). Groups 1 and 2 were endodontically treated. Standardized mesio-occlusal distal cavities were then prepared in both Groups 1 and 2. Groups 1 and 2 were restored with amalgam using Nayyar’s core technique and glass fiber post with composite resin core, respectively. Group 3 consisted of intact teeth which acted as control group. All teeth were tested under constant occlusal load until fracture occurred using a Universal Testing Machine. Data analysis was carried out using Kruskal–Wallis test complemented by Mann–Whitney test. Results: The mean values of fracture strength were 388.05 N (± 158.09) for Group 1, 588.90 N (± 151.33) for Group 2, and 803.05 N (± 182.23) for Group 3. Kruskal–Wallis test showed significant differences among all three groups in terms of fracture strength. The mean load required to fracture intact teeth in Group 3 was significantly highest, followed by Group 2 (P < 0.01) and finally Group 1 (P < 0.01). Most fractures occurred within the coronal structure and were considered favorable pattern. Besides, majority of the fractures occurred on restorations and particularly at the distal side. Conclusions: Teeth restored with fiber post and composite core resulted in higher fracture resistance than teeth restored with Nayyar’s core amalgam restoration.

Keywords

Fracture pattern - fracture resistance - glass fiber post - Nayyar’s core - post and core technique

Financial support and sponsorship

Financial support for this study was provided by Universiti Sains Malaysia under the short-term research grant scheme no. 304/PPSG/61313139 and 304/PPSG/61313106.




Publication History

Article published online:
01 November 2021

© 2018. European Journal of General Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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