Journal of Research and Advancement in Dentistry
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Year : 2020
Volume : Volume 11
Issue : Issue 1
Address for correspondence :
Dr. Govind Nandkumar Agrawal.
govindnandkumaragrawal@gmail.com
Background: The success of endodontic therapy relies on proper biomechanical preparation, disinfection and three-dimensional obturation of the root canal system. During cleaning and shaping of the root canal system, mechanical instrumentation leaves a smear layer covering the dentinal walls. Mechanical instrumentation, therefore, must be supplemented by irrigation to keep the canal wall lubricated, to remove/kill microorganisms, and to dissolve pulp remnants and infected predentin from root canals and ramification. Irrigation has a major influence on removal of smear layer as well. A number of chemicals have been investigated as irrigants to remove the smear layer, for example, sodium hypochlorite (NaOCl), ethylenediaminetetraacetic acid (EDTA), citric acid, etc. Materials and methods: The present study was conducted in the Department of Endodontics of the dental institution. This study was conducted in-vitro. A total of 30 single rooted human maxillary central incisors were selected for the study, They were decoronated to get the stable reference point and to standardize the root canal length of 14 mm. Patency of the root canal is established by passing a stainless steel number 15 K-file just beyond the apex of all canals. Working lengths were determined by subtracting 1 mm from that length. Canals were prepared using ProTaper rotary system. Results: In the present study, a total of 30 single rooted maxillary central incisors were used for evaluation of efficacy of saline, EDTA and MTAD as final irrigants for apical third of root canal. It was observed that the efficacy of saline was lowest as it was not able to remove smear layer. The most efficacious irrigating solution was MTAD. The results on comparison were statistically significant. Conclusion: Within the limitations of the present study, it can be concluded that MTAD was more effective in smear layer removal than EDTA and saline in the apical third.
Keywords: Smear removal, endodontic treatment, root canal, EDTA.
