Influence of Micro-Guided Endodontics in a Conservative Access Cavity on Fracture Resistance

Aim: compare traditional access cavity (TAC) and conservative access cavity(CAC) using micro-guided endodontics, by measuring the volume of dentin removed(VDR) using cone beam computed tomography (CBCT) and fracture resistance (FR)test. Methods: Sixty unidentified extracted human maxillary premolar teeth werecollected and divided into three groups: group A subjected to TAC, group B subjectedto CAC using micro-guided endodontics, and a control group which remained soundwithout access cavity preparations. Groups A and B were scanned pre-operativelyand post-operatively by CBCT, then subjected to a fracture resistance test using anInstron® universal testing machine after access cavity preparations with a controlgroup. The Mann-Whitney test was used to compare VDR between groups, and theone-way ANOVA test was used to compare fracture resistance between groups.Result: There was no discernible difference in fracture resistance between the CACand control groups. However, a significant difference was noted between the TAC,CAC, and control groups. FR considerably decreased when VDR increased, and viceversa, indicating a significant negative association between the two variables. Therewas no discernible difference in fracture resistance between the CAC and controlgroups. However, a notable distinction was noted between the TAC, CAC, and controlgroups. VDR and FR showed a substantial negative association, declining significantlywhen VDR rose and vice versa. Conclusion: According to the study’s limitations,the CAC via micro-guided endodontics approach improved the fracture resistance ofendodontically treated teeth contrasted to TAC.