The effect of retentive interlocking on the push-out failure of fiber post/composite core system
Aim: To suggest an approach to augment the integrity of Fiber post/composite core systems (FP/CCS) to laboratory-made models representing teeth with no-wall defects. Methods: 50 metal rings, 2 mm thick; 20 mm in outer diameter and 4 mm in inner diameter, were manufactured in 5 groups with circumfere...
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doaj-b6a319ee3b24497da562b6da979d904a2020-11-24T23:52:10ZengElsevierSaudi Dental Journal1013-90522019-01-0131S65S66The effect of retentive interlocking on the push-out failure of fiber post/composite core systemAdel M. Abdelmoneam0Muhammad F. Khan1Khalid M. Abdelaziz2Bader S. Al-Qahtani3Abdulaziz S. Alqarni4Wael A. Al Shehri5Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi ArabiaDepartment of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi ArabiaDepartment of Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia; Corresponding author at: Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, PO Box 3263, Abha 61471, Saudi Arabia.Intern, College of Dentistry, King Khalid University, Abha, Saudi ArabiaIntern, College of Dentistry, King Khalid University, Abha, Saudi ArabiaIntern, College of Dentistry, King Khalid University, Abha, Saudi ArabiaAim: To suggest an approach to augment the integrity of Fiber post/composite core systems (FP/CCS) to laboratory-made models representing teeth with no-wall defects. Methods: 50 metal rings, 2 mm thick; 20 mm in outer diameter and 4 mm in inner diameter, were manufactured in 5 groups with circumferential undercut, 2 diametrically-positioned undercut notches, 3 triangularly-positioned undercut notches, 4 angularly-positioned undercut notches, and no undercut (groups 1–5 respectively, n = 10 each) within their lumens. After cementing the fiber posts and building the composite cores up, the cement- post block of each specimen was stressed on push-out mode using metal rod 2 mm in diameter on a universal testing machine. The maximum load at failure were recorded for each group and statistically analysed. Both One-Way ANOVA and LSD tests at α = 0.05 were used to indicate the differences between test groups. Results: Statistical analysis of the collected data indicated significant differences between test groups (p < 0.05). Group 1 specimens exhibited the highest failure load, while those of group 5 recorded the lowest. Most of specimens in Groups 1, 3 and 4 recorded failures at post-cement interfaces, while in G2 and G5 the most recorded failures were at cement-wall interfaces. Conclusion: Most of the suggested retentive means could augmented the integrity of FP/CCS. Using 2 diametrically-positioned undercut notches seem of minimal benefit. Studying the mode of failure on natural tooth models is mandatory before recommending this augmentation method for routine clinical application.http://www.sciencedirect.com/science/article/pii/S1013905219301865 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Adel M. Abdelmoneam Muhammad F. Khan Khalid M. Abdelaziz Bader S. Al-Qahtani Abdulaziz S. Alqarni Wael A. Al Shehri |
spellingShingle |
Adel M. Abdelmoneam Muhammad F. Khan Khalid M. Abdelaziz Bader S. Al-Qahtani Abdulaziz S. Alqarni Wael A. Al Shehri The effect of retentive interlocking on the push-out failure of fiber post/composite core system Saudi Dental Journal |
author_facet |
Adel M. Abdelmoneam Muhammad F. Khan Khalid M. Abdelaziz Bader S. Al-Qahtani Abdulaziz S. Alqarni Wael A. Al Shehri |
author_sort |
Adel M. Abdelmoneam |
title |
The effect of retentive interlocking on the push-out failure of fiber post/composite core system |
title_short |
The effect of retentive interlocking on the push-out failure of fiber post/composite core system |
title_full |
The effect of retentive interlocking on the push-out failure of fiber post/composite core system |
title_fullStr |
The effect of retentive interlocking on the push-out failure of fiber post/composite core system |
title_full_unstemmed |
The effect of retentive interlocking on the push-out failure of fiber post/composite core system |
title_sort |
effect of retentive interlocking on the push-out failure of fiber post/composite core system |
publisher |
Elsevier |
series |
Saudi Dental Journal |
issn |
1013-9052 |
publishDate |
2019-01-01 |
description |
Aim: To suggest an approach to augment the integrity of Fiber post/composite core systems (FP/CCS) to laboratory-made models representing teeth with no-wall defects. Methods: 50 metal rings, 2 mm thick; 20 mm in outer diameter and 4 mm in inner diameter, were manufactured in 5 groups with circumferential undercut, 2 diametrically-positioned undercut notches, 3 triangularly-positioned undercut notches, 4 angularly-positioned undercut notches, and no undercut (groups 1–5 respectively, n = 10 each) within their lumens. After cementing the fiber posts and building the composite cores up, the cement- post block of each specimen was stressed on push-out mode using metal rod 2 mm in diameter on a universal testing machine. The maximum load at failure were recorded for each group and statistically analysed. Both One-Way ANOVA and LSD tests at α = 0.05 were used to indicate the differences between test groups. Results: Statistical analysis of the collected data indicated significant differences between test groups (p < 0.05). Group 1 specimens exhibited the highest failure load, while those of group 5 recorded the lowest. Most of specimens in Groups 1, 3 and 4 recorded failures at post-cement interfaces, while in G2 and G5 the most recorded failures were at cement-wall interfaces. Conclusion: Most of the suggested retentive means could augmented the integrity of FP/CCS. Using 2 diametrically-positioned undercut notches seem of minimal benefit. Studying the mode of failure on natural tooth models is mandatory before recommending this augmentation method for routine clinical application. |
url |
http://www.sciencedirect.com/science/article/pii/S1013905219301865 |
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