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Evaluation of enamel surface damage after debonding using three different pliers "An in vitro study"

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Abstract

AbstractThis study aims to compare the effectiveness of three different pliers in debondingstainless steel and ceramic brackets, also to evaluate enamel surface damage and thesite of bond failure after debonding.Sixty premolars, extracted for orthodontic purposes, were divided into 3 groups of20. The enamel surfaces were examined with 10X magnifying lens. Two types ofbracket (stainless steel and ceramic) was bonded and debonded in each group using:conventional debonding pliers, bracket removal pliers, and ligature wire cutter. Afterdebonding, the enamel surfaces were inspected under a stereomicroscope to determinethe predominant site of bond failure. Then stereomicroscope was used to evaluateenamel surface damage after the removal of residual adhesive.The enamel surface damage showed a statistically significant difference in ceramicbracket groups, whereas, it was statistically insignificant in stainless steel bracketgroups. The amount of the adhesive remained on the tooth surface was statisticallyinsignificant in both stainless steel and ceramic bracket groups. The predominantfailure site was within the adhesive itself for both types of brackets.The enamel surface damage that results from debonding of ceramic brackets washigher than that found with the stainless steel brackets especially with the use ofbracket removal pliers "used in this study"


Article
Enamel surface damage after Use of self-etched Flowable composite and conventional orthodontic bonding systems "An in vitro study"
ضرر سطح المينا بعد استعمال الرابط المائع ذاتي اللصق وأنظمة الربط لتقويم الأسنان التقليدية "دراسة في المختبر

Author: Rawof R. Al-Tuma رؤوف رشيد جواد ال طعمة
Journal: karbala journal of pharmaceutical sciences مجلة كربلاء للعلوم الصيدلانية ISSN: 70272221 Year: 2016 Issue: 11 Pages: 116-123
Publisher: Kerbala University جامعة كربلاء

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Abstract

Background: This study aims to evaluate enamel surface damage and the site of bond failure afterusing of two materials with each has different adhesive techniques. One of them is self-etch (7thgeneration bonding system) while the other with three steps conventional technique(5th generationbonding system).Materials and methods: eighty premolars, extracted for orthodontic purposes, were divided into 4groups of 20. The enamel surfaces were examined with 10X magnifying lens. Two types ofbracket (stainless steel and ceramic) was bonded and debonded in each group using ligature wirecutter. The three steps adhesives was conventional orthodontic bracket adhesive of Oromcocompany, the self-etch flowable adhesive was Vertise flow flowable composite of Kerr company;After debonding, the enamel surfaces were inspected under a stereomicroscope to determine thepredominant site of bond failure and adhesive remnant index. Then stereomicroscope was used toevaluate enamel surface damage after the removal of residual adhesive.Results: The reduction in enamel surface damage showed a statistically non-significant with theuse of self-etched flowable adhesive in both ceramic and stainless steel brackets groups. Theamount of the adhesive remained on the tooth surface significantly increase for groups thatbonded with self-etched flowable adhesive in both stainless steel and ceramic brackets. Thepredominant failure site in self-etch flowable adhesive was between enamel and bracket for bothtypes of brackets.Conclusion: The enamel surface damage that results from debonding of conventional orthodonticadhesives was non significantly higher than that found with self-etch flowable adhesive for bothmetal and ceramic brackets "used in this study"

تهدف هذه الدراسة إلى تقييم أضرار المينا السطحية وموقع من فشل السندات بعد استخدام اثنين من المواد مع بعضها لديهاتقنيات لاصقة مختلفة .واحد منهم هو اللصق الذاتي نظام الربط جيل في حين أن الآخر مع ثلاث خطوات (تقنية التقليدية )10 عدسة X ثمانون سن ضاحك مقلوعة لأغراض تقويم الأسنان، تم تقسيمهم إلى 4مجموعات . تم فحص السطوح المينا معمكبرة . مع استخدام نوعين من سنادات التقويم (الفولاذ المقاوم للصدأ والسيراميك) . اللواصق المستخدمة كانت اللاصق التقليديبعد رفع الروابط، تم تفتيش السطوح المينا باستخدام المجهر ؛Kerr والاصق الذاتي المائع لشركة ،Ormco لتقويم من شركةلتحديد موقع فشل السندات والبقايا اللاصقة ثم تقييم ضرر المينا بعد إزالة اللواصق المتبقية

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