Fracture resistance of over-flared root canals filled with MTA and resin-based material: an in vitro study

Authors

  • Salma B. Abdo University Sains Malaysia
  • Sam’an Malik Masudi University Sains Malaysia
  • Norhayati Luddin University Sains Malaysia
  • Adam Husien University Sains Malaysia
  • Mohd Fadhli Khamis University Sains Malaysia

DOI:

https://doi.org/10.20396/bjos.v11i4.8641219

Keywords:

Instron machine, Scanning electron microscopy, Micro CT scan, Mineral trioxide aggregate

Abstract

Aim: To measure the fracture resistance of over-flared roots filled with a variety of materials (gutta-percha-nano HA, resilon-epiphany, composite and mineral trioxide aggregate - MTA) using the Instron machine test and micro-computed tomography (Micro CT) Scan. In addition, scanning electron microscopy (SEM) images were used to illustrate the type of fracture patterns of the specimens. Methods: One hundred and twenty extracted human mandibular singlerooted premolars were selected. A total of 105 out of the selected teeth were prepared to the working length and over-flared, leaving the apical 5 mm undisturbed. Fifteen samples had no treatment and were used as a positive control group (Group +ve). The 105 test teeth were further divided into 7 groups of 15 samples each. One of the 7 groups was designated as negative control (Group -ve) where teeth were over prepared and left without obturation. Remaining groups were filled with gutta-percha-nanoHA (Group1), gutta-percha-nano HA+composite (Group 2), gutta-percha-nano HA+MTA (Group 3), resilon-epiphany (Group 4), resilon-epiphany+composite (Group 5), and resilon-epiphany+MTA (Group 6). Fracture resistance of all samples was measured using the Instron testing machine. Three samples from each group had the depth of their fracture line measured by Micro CT Scan, and 2 samples from each group had their fracture pattern illustrated using SEM. Results: The highest fracture resistance was observed in Group +ve, followed by Groups 3, 6, 5, 2, 4, 1, and Group -ve, with values (in N) of: 1598 (641.0), 1190.5(424.2), 1164.7 (489.4), 821.2 (220.9), 683.4(179), 658.4 (211.3), 658.4 (99.0), 158.3(49.3), respectively. Statistical analysis for root fracture resistance showed highly significant difference between all groups with p value < 001. Conclusions: Micro CT Scan and SEM analysis indicated the ability of MTA to withstand vertical force.

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Author Biographies

Salma B. Abdo, University Sains Malaysia

BDS, MSc, PhD Student, Department of Restorative Dentistry, School of Dental Sciences, University Sains Malaysia.

Sam’an Malik Masudi, University Sains Malaysia

DDS, MS, School of Dental Sciences, Department of Restorative Dentistry, University Sains Malaysia

Norhayati Luddin, University Sains Malaysia

BDS, Department of Restorative Dentistry, School of Dental Sciences, University Sains Malaysia

Adam Husien, University Sains Malaysia

BDS, Department of Restorative Dentistry, School of Dental Sciences, University Sains Malaysia

Mohd Fadhli Khamis, University Sains Malaysia

BDS, PhD, Department of Craniofacial Sciences & Oral Biology, School of Dental Sciences, University Sains Malaysia

Published

2015-10-22

How to Cite

1.
Abdo SB, Masudi SM, Luddin N, Husien A, Khamis MF. Fracture resistance of over-flared root canals filled with MTA and resin-based material: an in vitro study. Braz. J. Oral Sci. [Internet]. 2015 Oct. 22 [cited 2022 Aug. 8];11(4):451-7. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641219

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