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TITLE:

A CROSS-SECTIONAL RESEARCH TO COMPARE THE SAFETY AND EFFICACY OF DEBONDING PLIER AND CROWN REMOVER FOR BOND FAILURE SITE

AUTHORS:

Dr. Amber Shaheen, Dr. Muhammad Yawar Hayat, Muhammad Abdullah

ABSTRACT:

Abstract: Background: Orthodontic brackets debonding is considered as the last available option in the orthodontic treatment which needs ultimate care and use of best available strategy. Objective: The aim of this research was to compare bond failure site after debonding brackets with the help of crown remover and debonding plier. Subjects and Methods: This cross-sectional research was carried out at Allied Hospital, Faisalabad from September 2017 to April 2018. In this research, we bonded a total of 160 newly extracted premolars through metal brackets by dividing the total 160 cases among Group – A & B (each carrying 80 cases). Group – A was treated with the help of DP (Debonding Plier); whereas, Group – B was treated with CR (Crown Remover). A subsequent visual assessment of enamel surface was also carried out after debonding procedure for the possible adhesive remnant. We also applied an ARI (Adhesive Remnant Index) with a score of 0 – 3 (four-point scoring index). Moreover, cross-tabulation of both pliers was also carried out. Results: Among 160 brackets, 80 were deboned by crown remover and remaining 80 through debonding plier. Debonding plier caused fifty percent incidence of failure of the bond at enamel adhesive interfer¬ence; whereas, in case of crown remover presented failure of cohesive bond primarily in ARI category I & II. The researcher used SPSS for measurement of ARI Score. Both the pliers were cross-tabulated for safety and efficacy. There was a significant difference in the effectiveness of both the pliers. Detailed outcomes are given in the tabular and graphical data. Categorical data were compared through Chi-square test. Conclusion: The bond failure site was most of the time in the range of adhesive when debonding was carried out with the help of CR; whereas, it was at enamel adhesive interference when treated with the help of DP. Outcomes show that CR is safer than DP in terms of safety and efficacy. Keywords: Debonding, Plier, Crown, Remover, Bracket, Orthodontic, Adhesive and Enamel.

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