Efficacy of new irrigating solution on smear layer removal in apical third of root canal: A scanning electron microscope study

Priyanka Himmatrao Patil; Meenal Nitin Gulve; Swapnil Janardan Kolhe; Roshan Mathew Samuel; Gayatri Balasaheb Aher

doi:10.4103/JCD.JCD_155_17

Efficacy of new irrigating solution on smear layer removal in apical third of root canal: A scanning electron microscope study

J Conserv Dent. 2018 Mar-Apr;21(2):190-193. doi: 10.4103/JCD.JCD_155_17.

Authors

Priyanka Himmatrao Patil¹, Meenal Nitin Gulve¹, Swapnil Janardan Kolhe¹, Roshan Mathew Samuel¹, Gayatri Balasaheb Aher¹

Affiliation

¹ Department of Conservative Dentistry and Endodontics, M. G. V's KBH Dental College and Hospital, Nashik, Maharashtra, India.

Abstract

Aims: The aim of this in vitro study is to evaluate and compare the smear layer removal efficacy of etidronic acid-based irrigating solution with others in the apical third of the root canal.

Materials and methods: Forty human single-rooted mandibular premolar teeth were taken and decoronated to standardize the canal length. After biomechanical preparation, teeth were randomly divided into four groups (n = 10) and the final irrigation was carried out with tested irrigants. Group I: normal saline (negative control); Group II: 5.25% sodium hypochlorite (NaOCl) with surfactant and 17% ethylenediaminetetraacetic acid (EDTA) with surfactant; Group III: freshly mixed BioPure MTAD; and Group IV: freshly mixed Chloroquick solution. The teeth were split into two halves and observed under a scanning electron microscope to analyze the amount of smear layer present.

Statistical analysis: Data were analyzed using the Kruskal-Wallis test and Mann-Whitney test.

Results: Group II (5.25% NaOCl with surfactant followed by 17% EDTA with surfactant) showed least smear layer scores (1.1 ± 0.3162). This was followed by Group III (MTAD) (2.2 ± 0.4216) and then Group IV (Chloroquick) (2.4 ± 0.5164).

Conclusion: Sequential use of 5.25% NaOCl with surfactant and 17% EDTA with surfactant was found to be the most efficient than MTAD and Chloroquick in the removal of smear layer in the apical third of root canal.

Keywords: Chloroquick; MTAD; ethylenediaminetetraacetic acid; etidronic acid; scanning electron microscopy; smear layer; sodium hypochlorite; surfactant.