Page 162 - FINAL COMPENDIUM 2020-2021 27.2.2022

INFLUENCE OF DIFFERENT ACCESS CAVITY DESIGNS ON THE FRACTURE RESISTANCE OF
ENDODONTICALLY TREATED TEETH

Ahmad Fareez AA, Tahir YN, Nik Rozainah NAG, Mohamad Syahrizal H

Objective: To determine the effect of various endodontic access cavity designs on the
fracture strength of endodontically treated teeth. Materials and methods: Eighty intact
human first mandibular molars extracted for periodontal or other reason were collected
and randomly assigned to four groups (n=20 per-arm), control (intact teeth), Traditional
endodontic access cavity (TEC), Conservative endodontic access cavity (CEC) and Truss
endodontic access cavity (TREC). Teeth in the TEC group were prepared following the
principles of TEC. Minimally invasive and orifice-directed endodontic access were
prepared in CEC and TREC groups respectively. All access cavities were then restored with
composite and teeth in all groups were loaded until fracture using a mechanical testing
machine. The maximum load at fracture and fracture patterns (restorable or
unrestorable) were recorded. Fracture loads were compared statistically using ANOVA,
and Chi-Square test for multiple comparisons. Level of significance was set at P < 0.05.
Results: The mean load at fracture for TEC was significantly lower than CEC, TREC and
control groups (P < 0.05). No significant difference was observed between CEC, TREC and
control groups (P > 0.05). Unrestorable fractures were significantly more frequent in all
three endodontic access groups (P < 0.05) as compared to intact teeth. Conclusion: Teeth
with TEC showed lower fracture strength than teeth with CEC or TREC. TREC did not
increase the fracture strength of teeth as compared to CEC. Intact teeth showed more
restorable fractures than all prepared ones.

Keywords: Traditional endodontic access cavity, Conservative endodontic access cavity, Fracture
resistance, Truss endodontic access cavity.

Virtual clinical research poster presentation at the Sabah Research Month 2021 on 15 October 2021

Dr Ahmad Fareez bin Abdul Aziz
Klinik Pergigian Tuaran
Kota Kinabalu, Sabah

Dr Tahir Yusuf Noorani
Dr Nik Rozainah binti Nik Abdul Ghani
Dr Mohamad Syahrizal bin Halim
Conservative Dentistry Unit
School of Dental Sciences
Universiti Sains Malaysia

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