Comparative Analysis of Root Canal Geometry Alterations Created by Three Rotary Ni-Ti Systems: A CBCT Investigation

Abstract

Aim: Comparison of shaping ability of three rotary Ni-Ti systems: Orodeka, Gen Endo, and Mani Jizai in the mandibular molars using cone-beam computed tomography (CBCT).

Materials and method: This prospective in-vivo investigation comprised 45 mandibular molars with curvatures ranging from 20° to 40°. Teeth were randomly assigned to three groups (n = 15) based on the rotational system: Orodeka, Gen Endo, and Mani Jizai. Standardised access cavity preparation, glide route construction, & biomechanical preparation were carried out in accordance with manufacturer specifications. Pre and Post instrumentation CBCT scans were acquired. Using the Gambill et al. formula, canal transportation was estimated at 3 mm, 8 mm, & 15 mm from the root apex respectively. Data was analysed using one-way ANOVA & post-hoc testing.

Discussion: Satistically significant difference was noted at 3 mm in canal transportation amongst the three systems (p = 0.04); Orodeka with least transportation. There were no statistically significant changes between the 8- and 15-mm levels (p > 0.05). Intergroup study found substantial changes at the intermediate as well as apical levels, while intragroup comparisons revealed no clinically meaningful variation between canal levels within any system.

Conclusion: All three rotational Ni-Ti systems showed effective and predictable shaping, with minimum canal transportation and good centring. The results indicate that Orodeka, Gen Endo, & Mani Jizai are safe and appropriate for regular endodontic instrumentation of mandibular molars.