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The effect of anti-oxidant agents as neutralizers of bleaching agents on dentin bond strength
Joint Authors
al-Rawi, Inas I.
al-Bayati, Iyad Mahmud
Source
Journal of Baghdad College of Dentistry
Issue
Vol. 25, Issue 2 (30 Jun. 2013), pp.18-23, 6 p.
Publisher
University of Baghdad College of Dentistry
Publication Date
2013-06-30
Country of Publication
Iraq
No. of Pages
6
Main Subjects
Topics
Abstract AR
خلال السنوات الماضية لاحظ الباحثون النقص الحاصل في قوة الربط القصي عن إجراء اللصق الآني للحشوة الضوئية مباشرة بعد عملية قصر الأسنان داخل التاج.
الغرض من إجراء هذا البحث هو لتقييم تأثير مواد مضادات التأكسد (10 % اسكوربات الصوديوم، 0,1 مول ثايوريا و 7 % بيكاربونات الصوديوم) على قدرتها على إعادة الربط القصي لمادة الراتنج المركب إلى سابق عهدها قبل عملية القصر.
و لهذا الغرض تم اختيار ستون سن من الضواحك و تم قصرها باستخدام بيروكسيد الهيدروجين بتركيز 35 % و النتائج أثبتت بعد معالجة عينات العاج المقصورة بمادة 10 % اسكوربيدات الصوديوم نتج عنه زيادة عالية في قوة الربط القصي بين مادة الكمبوزيت و العاج و إعادة قيمة قوة الالتصاق إلى مستوى الالتصاق مع العاج الغير مقصور.
إحصائيا لم تكن هناك زيادة ملموسة في قوة الربط بين مادة الكمبوزيت و العاج المقصور عند معالجة عينات العاج المقصور بمادة 7 % بيكاربونات الصوديوم.
Abstract EN
Background: Reduction in bond strength when bonding was done immediately after intracoronal bleaching procedure has been recognized.
The purpose of this study is to assess the effect of antioxidants (10% sodium ascorbate (SA), 0.1M thiourea and7% sodium bicarbonate (SB)) on reversing bonding strength of composite resin to bleached dentin.
Materials and method: Sixty upper 1st premolar teeth, were selected, the crowns of the teeth were embedded in acrylic resin blocks exposing a flat dentin from the buccal surface, then divided into 6 groups (10 samples each).
Bleaching for the experimental groups was performed using 35% hydrogen peroxide bleaching gel (pola–office).Group A (Negative control group; dentin samples immediately bonded with composite without bleaching)Group B (Positive control group; dentin samples bleached and immediately bonded with composite).
Group C (Dentin samples bleached and stored for 14 days in DDW then bonded with composite).
Group D (Dentin samples bleached and treated with 10% (SA) then immediately bonded with composite).
Group E (Dentin samples bleached and treated with 0.1M thiourea then immediately bonded with composite).
Group F (Dentin samples bleached and treated with 7% SB then immediately bonded with composite).The shear bond strength was determine using instron testing machine.
Results: Bleaching the dentin with 35 % hydrogen peroxide gel for 24 minutes resulted in reduction in bond strength of the bleached teeth when bonding was performed immediately after bleaching.
Delayed bonding of composite to the bleached dentin for 14 days will result in a highly significant increase in the shear bond strength.
Conclusion: Treating the bleached dentin with 10% (SA) in water base showed a highly significant increase in the shear bond strength of the composite to dentin and reversing the bond strength value to the level of the unbleached dentin.
Treating the bleached dentin with 0.1M thiourea significantly increased the shear bond strength of the composite to dentin.
American Psychological Association (APA)
al-Bayati, Iyad Mahmud& al-Rawi, Inas I.. 2013. The effect of anti-oxidant agents as neutralizers of bleaching agents on dentin bond strength. Journal of Baghdad College of Dentistry،Vol. 25, no. 2, pp.18-23.
https://search.emarefa.net/detail/BIM-347064
Modern Language Association (MLA)
al-Bayati, Iyad Mahmud& al-Rawi, Inas I.. The effect of anti-oxidant agents as neutralizers of bleaching agents on dentin bond strength. Journal of Baghdad College of Dentistry Vol. 25, no. 2 (Jun. 2013), pp.18-23.
https://search.emarefa.net/detail/BIM-347064
American Medical Association (AMA)
al-Bayati, Iyad Mahmud& al-Rawi, Inas I.. The effect of anti-oxidant agents as neutralizers of bleaching agents on dentin bond strength. Journal of Baghdad College of Dentistry. 2013. Vol. 25, no. 2, pp.18-23.
https://search.emarefa.net/detail/BIM-347064
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 22-23
Record ID
BIM-347064