Comparison of Debonding Characteristics of the Conventional Metal and Self-Ligating Brackets to Enamel: An in Vitro Study
Publish place: Iranian Journal of Orthodontics، Vol: 9، Issue: 3
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
View: 206
نسخه کامل این Paper ارائه نشده است و در دسترس نمی باشد
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_ORTHO-9-3_002
تاریخ نمایه سازی: 12 آبان 1400
Abstract:
Background: Brackets’ debonding without any damage to the teeth is very important. Objectives: The aim of this study was to compare the debonding characteristics of the metal conventional and self-ligating brackets. Patients and Methods: ۶۹ maxillary premolars were randomly assigned in ۳ groups. Metal brackets of Damon, In Ovation and conventional systems were bonded to the teeth. The brackets were debonded with debonding pliers. Debonding strengths, adhesive remnant index, and enamel damage were evaluated. A Zwick model universal testing machine was used to measure debonding strengths. The debonding strength values were statistically analyzed by one-sided analysis of variance while the increase in the enamel crack numbers and length and the remained adhesive index were analyzed by chi-square test. Results: The means of the debonding strength in the brackets of in ovation, damon and conventional systems were ۱۵.۲۲, ۱۱.۴ and ۸.۶۷ MPa respectively. Significant differences were observed regarding debonding strength between three types of brackets (all: P < ۰.۰۰۱). After debonding of in ovation, damon and stainless steel brackets; the increased numbers of the enamel cracks were noted in ۲۶.۰۶%, ۲۱.۷۴% and ۱۷.۳۹% cases respectively. Also, the increased cracks lengths were demonstrated in ۴۷.۸۳%, ۳۹.۱۳%, and ۳۰.۴۳% cases. No significant differences were observed regarding the increase of the enamel cracks number and length and the amounts of residual adhesive on the teeth. Conclusions: The debonding characteristics of the metal self-ligating were comparable to the conventional brackets.
Keywords:
Authors
Mohammad Karim Soltani
Department of Orthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan, IR Iran
Sadegh Barkhori
Department of Orthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan, IR Iran
Yoones Alizadeh
Department of Mechanical Engineering, Amir Kabir University of Technology, Tehran, IR Iran
Farzaneh Golfeshan
Department of Orthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan, IR Iran