Effect of the Extent of Apical Enlargement on the Degree of Debridement of the Apical Third in Curved Root Canals

Authors

Syed Mukhtar-Un-Nisar Andrabi, Department of Conservative Dentistry and Endodontics, Dr. Ziauddin Ahamd Dental College, Aligarth Muslim University, Aligarth, IndiaFollow
Ashok Kumar, Department of Conservative Dentistry and Endodontics, Dr. Ziauddin Ahamd Dental College, Aligarth Muslim University, Aligarth, India
Rajendra Kumar Tewari, Department of Conservative Dentistry and Endodontics, Dr. Ziauddin Ahamd Dental College, Aligarth Muslim University, Aligarth, India
Surendra Kumar Mishra, Department of Conservative Dentistry and Endodontics, Dr. Ziauddin Ahamd Dental College, Aligarth Muslim University, Aligarth, India
Huma Iftekhar, Department of Conservative Dentistry and Endodontics, Dr. Ziauddin Ahamd Dental College, Aligarth Muslim University, Aligarth, India
Afaf Zia, Department of Periodontics and Community Dentistry, Dr. Ziauddin Ahamd Dental College, Aligarth Muslim University, Aligarth, India

Abstract

Objectives: The present study aimed to evaluate the influence of various apical instrumentation sizes and tapers on the degree of debridement of the apical third of curved root canals. Methods: We used 60 extracted human mandibular first molars with mesial root curvatures of 20° to 30°. In all teeth, access cavity preparation was performed, followed by coronal flaring with Gates Glidden drills #1–4 (Dentsply Maillefer). Specimen teeth were subsequently randomly divided into five groups (n = 12). Each group was enlarged to a particular apical size and taper as follows: no apical preparation done (group I, Control group); 25/.04 and 25/.06 (Group II); 30/.04 and 30/.06 (group III); 35/.04 (group IV); 40/.04 (group V). Specimens were rinsed with 17% EDTA and 3% NaOCl solutions. We used a scanning electron microscope to evaluate specimens’ degree of debridement. Retrieved data were analyzed using Kruskal–Wallis and Mann–Whitney U-tests (p < 0.05). Results: Acceptable debridement was observed in groups III, IV, and V. Additionally, debridement was significantly better in Groups IV and V than in group II. Conclusion: Apical preparation with <30/.04 size results in an unacceptable degree of debridement of the apical third.

Recommended Citation

Andrabi, S. M., Kumar, A., Tewari, R. K., Mishra, S. K., Iftekhar, H., & Zia, A. Effect of the Extent of Apical Enlargement on the Degree of Debridement of the Apical Third in Curved Root Canals. J Dent Indones. 2018;25(3): 130-134