Comparative evaluation of reversal of shear bond strength on bleached enamel-resin nanocomposite using antioxidants – sodium ascorbate, salicylic acid & N-acetyl cysteine: An in vitro study

Manjunathmandhiradoss Ramaiah; Ramaprabha Balasubramaniam; Kavitha Mahendran; Smitha Nataraj; Gnanaseelan Priyajohnson

doi:10.53730/ijhs.v6nS6.11662

Authors

Manjunathmandhiradoss Ramaiah Senior Assistant Professor, Dept. of Dental Surgery (Conservative Dentistry & Endodontics), Thoothukudi Govt. Medical College Hospital, Thoothukudi, Tamilnadu, India | Affliated to Tamilnadu Dr. M.G.R Medical University, Guindy, Chennai, Tamilnadu, India
Ramaprabha Balasubramaniam Professor, Dept of Conservative Dentistry & Endodontics, Tamilnadu Govt. Dental College Hospital, Chennai, Tamilnadu, India|Affliated to Tamilnadu Dr. M.G.R Medical University, Guindy, Chennai, Tamilnadu, India
Kavitha Mahendran Professor/HOD, Dept. of Conservative Dentistry & Endodontics, Tamilnadu Govt. Dental College Hospital, Chennai, Tamilnadu, India | Affliated to Tamilnadu Dr.M.G.R Medical University, Guindy, Chennai, Tamilnadu, India
Smitha Nataraj
smithacbe@yahoo.com
Senior Asst. Professor, Dept. of dental surgery (Conservative Dentistry & Endodontics), Govt. medical College and ESI Hospital, Coimbatore, Tamilnadu, India | Affliated to Tamilnadu Dr. M.G.R Medical University, Guindy, Chennai, Tamilnadu, India
Gnanaseelan Priyajohnson Senior Lecture Dept Dept. of Conservative Dentistry & Endodontics, Rajas dental college, Tirunelveli, Tamilnadu, India | Affliated to Tamilnadu Dr. M.G.R Medical University, Guindy, Chennai, Tamilnadu, India

Keywords:

bleaching, shear bond strength, nano-composites, Abdominal Strength, sodium ascorbate, salicylicacid, N-acetylcysteine

Abstract

Aim: The aim of this study was to compare the reversal of shear bond strength of bleached enamel using 3 antioxidant agents. Methods and Materials: 60 labial enamel blocks of maxillary central incisors were prepared, divided into six groups (n=10). Group I is control group without bleaching and without antioxidants, all the other groups were bleached with 30% carbamide peroxide. Group II, composite bonding done immediately without antioxidants application, Group III, composite bonding done after 7 days of storage in artificial saliva without receiving antioxidants. Group IV, bleached enamel receive sodium ascorbate (SA) antioxidant application for 10 minutes, followed with composite bonding immediately, similarly Group V and VI bleached enamel samples received salicylicacid(SAC) and N-acetylcysteine(NAC) antioxidants application for 10 minutes and composite bonding immediately. All the teeth were subjected to shear bond testing in universal testing machine. Statistical analysis used: The shear bond strength data was analyzed by ANOVA test and multiple comparisons by Tukey’s post-hoc tests at a significance level of P < 0·05. Results: The result of this study showed that for shear bond strength, unbleached normal enamel (group I) showed highest SBS value among all the groups.

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