Year : 2014 | Volume
: 17 | Issue : 4 | Page : 330--334
Evaluation of smear layer removal from ultrasonically prepared retrocavities by three agents
Raghu Srinivasan, Girish Sooranagenahalli Ashwathappa, Pramod Junjanna, Shreetha Bhandary, Ranjini Mandagere Aswathanarayana, Ashwija Shetty
Department of Conservative Dentistry and Endodontics, A.E.C.S Maaruti College of Dental Sciences and Research Centre, Bangalore, Karnataka, India
Objectives: To evaluate the efficacy of 35% orthophosphoric acid, 24% ethylenediaminetetraacetic acid (EDTA) and 10% citric acid in the removal of smear layer from retrocavities prepared with ultrasonic retro-tips using scanning electron microscopy.
Materials and Methods: Root canals of fifty single-rooted teeth were cleaned, shaped, and obturated with gutta-percha and AH plus sealer. The apical 3 mm of each root was sectioned with a diamond disc and retrograde cavities were prepared with Kis # 1 ultrasonic retro-tips to a depth of 3 mm. Retro cavities in Group I were treated with a gel of 35% orthophosphoric acid for 15 seconds, Group II were treated with a gel of 24% EDTA at neutral pH for 2 minutes, and Group III were treated with a gel of 10% citric acid for 2 minutes, followed by 1 minute rinsing with distilled water for all groups. The samples were prepared for scanning electron microscopic observation. Scoring was performed for the presence of the smear layer on the walls of the retrocavity.
Results: In the orthophosphoric acid group, it was observed that all dentinal tubules were open in 70% of the samples. The majority of analyzed samples in EDTA and citric acid group showed dentinal tubules covered with the smear layer.
Conclusions: Application of 35% orthophosphoric acid gel for 15 seconds on retrocavities prepared with ultrasonic retro-tips is the most effective means for removal of smear layer.
Girish Sooranagenahalli Ashwathappa
Lal Bahadhur Shastry Layout, Cordial School Road, Madhugiri - 572 132, Tumkur, Karnataka
|How to cite this article:|
Srinivasan R, Ashwathappa GS, Junjanna P, Bhandary S, Aswathanarayana RM, Shetty A. Evaluation of smear layer removal from ultrasonically prepared retrocavities by three agents.J Conserv Dent 2014;17:330-334
|How to cite this URL:|
Srinivasan R, Ashwathappa GS, Junjanna P, Bhandary S, Aswathanarayana RM, Shetty A. Evaluation of smear layer removal from ultrasonically prepared retrocavities by three agents. J Conserv Dent [serial online] 2014 [cited 2019 Nov 12 ];17:330-334
Available from: http://www.jcd.org.in/article.asp?issn=0972-0707;year=2014;volume=17;issue=4;spage=330;epage=334;aulast=Srinivasan;type=0