Resistance to Fracture of Premolars According to the Design of the Endodontic Access Cavity. In vitro Study

2024 • Volume 18 • Issue 2

Mauricio Alonso Arias Moreno & Aurealuz Morales-Guevara



The preparation of the access cavity is the first step and an essential requirement for the instrumentation and obturation of the root canals during endodontic treatment. The objective of the present study was to compare the in vitro fracture resistance of premolars with traditional access cavity (CAT), conservative access cavity (CAC) and ultraconservative access cavity (CAU). This was a cross-sectional, prospective and pure experimental research. It was carried out with 40 upper second premolars, divided into 4 groups. All samples were disinfected and stored in containers with 0.9 % physiological saline. The first group was designated as the control, the second group CAT, the third group CAC and the fourth group CAU. All endodontic accesses were carried out with a high-speed handpiece with refrigeration, respecting the protocol of each of the designs, after which the endodontic treatment and restoration of the specimens was carried out. Once all the samples were prepared, they were subjected to a fatigue test in a universal testing machine and the results were recorded in Newtons. The statistical test used was ANOVA with a significance level of 5 %. The CAT obtained the lowest fracture resistance value, presenting statistically significant differences with the control group. However, no statistically significant differences were observed between the CAT, CAC, and CAU groups. Furthermore, between the CAC and CAU groups, no statistically significant differences were found compared to the control group.

KEY WORDS: endodontic, access cavity, traditional, conservative, minimally invasive, fracture resistance.


How to cite this article

ARIAS MORENO, M.A. & MORALES-GUEVARA, A. Resistance to fracture of premolars according to the design of the endodontic access cavity. In vitro study. Int. J. Odontostomat., 18(2):165-169, 2024.


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