Page 49 - MDA SCATE 2024 Programme Book

ORAL PRESENTATION

ABSTRACTS

Evaluation of weakened endodontically treated teeth restored with
Abstract 1
fibre-reinforced composite: Open apex and flared root canals

Alshetiwi, D. S. D., Abdul Muttlib, N. A., El-Damanhoury, H. M., Alawi, R.,
4
3
2
1
Abd Rahman, N., & Elsahn N.A. 6
5
1. Department of Oral and Craniofacial Health Sciences, College of Dental
Medicine, University of Sharjah, Sharjah, United Arab Emirates.
2. Prosthodontics Unit, School of Dental Sciences, Universiti Sains Malaysia,
Health Campus, Kelantan, Malaysia.
3. Department of Preventive and Restorative Dentistry, College of Dental
Medicine, University of Sharjah, Sharjah, United Arab Emirates.
4. Conservative Dentistry Unit, School of Dental Sciences, Universiti Sains
Malaysia, Health Campus, Kelantan, Malaysia.
5. Dental Public Health Unit, School of Dental Sciences, Universiti Sains
Malaysia, Health Campus, Kelantan, Malaysia.
6. Department of Clinical Sciences, College of Dentistry, Ajman University,
Ajman, United Arab Emirates.

Introduction: Endodontically treated teeth (ETT) with compromised root
canals are at high risk of fracture. The use of intra-radicular posts in these
teeth is accompanied by a large resin cement layer due to the discrepancy
in the size and shape between the post and root canal, which may cause
failure in future.
Objectives: This study aimed to assess the combination of different forms
of fibre-reinforced composites (FRC) used to enhance mechanical behav-
iour of compromised ETT.
Methodology: Eighty human premolar teeth were randomly allocated to
five experimental groups (n = 16). Groups were divided according to canal
preparation methods and intra-radicular restoration with either a standard
prefabricated fibre post or anatomically customized relined fibre post.
Fracture resistance and push-out bond strength tests were then carried out
through a universal testing machine after artificial aging, followed by failure
analysis via a stereomicroscope and scanning electron microscope.
Results: Results of fracture resistance test showed the highest fracture
resistance (1796 N) in Group 5, while Group 2 showed the lowest mean
fracture resistance (758 N). The values are significant when compared with
the other groups. For push-out bond strength test, Group 5 and Group 4
demonstrated a significantly higher bond strength at all root thirds (p<0.05)
than Group 3, Group 2, and Group 1. The most frequently observed failure
occurred between the resin cement and radicular dentin for all the groups.
Conclusion: In conclusion, the use of short fibre-reinforced composite
(SFRC) to reline the prefabricated FRC post has been proven to have superior
fracture resistance with favourable failure patterns and increased push-out
bond strength values compared to standard prefabricated FRC posts.

PAGE 49