Alrafaa Abeer Abdullah, Bilal Rabia, Alshahrani Ibrahim
College of Dentistry, Qassim University.
Department of Orthodontics, College of Dentistry, Qassim University.
J Pak Med Assoc. 2019 Jan;69(1):82-86.
To determine the shear bond strength of orthodontic brackets after anti-oxidant treatment on previously bleached teeth..
The experimental in-vitro study was conducted in Saudi Arabiaat Qassim University, Al-Qassim, and King Saud University, Riyadh, from December 2016 to March 2017, and comprised extracted maxillary and mandibular premolars which were divided randomly into three groups. In Group A, which was the control group, the teeth were etched and bonded, while those in Group B were bleached, etched and bonded. Group C was subjected to bleaching, followed by treatment with anti-oxidant 10% sodium ascorbate solution, then etched and bonded. All three groups were then tested and analysed for bond strength using the Instron, Universal testing machine. SPSS 23 was used for data analysis..
There were 60 teeth with 20(33.3%) in each of the three groups. Group C had the maximum mean shear bond strength of 12.231}2.1Mpa, followed by Group A with 10.948+/-2.1Mpa and Group B with 7.621}1.8Mpa.
Anti-oxidant treatment had a positive effect on the shear bond strength of orthodontic brackets after tooth bleaching. Keywords: Anti-oxidant. Bleaching, Brackets, Extracted premolars, Shear bond strength.
确定在先前漂白过的牙齿上进行抗氧化处理后正畸托槽的剪切粘结强度。
2016年12月至2017年3月，在沙特阿拉伯卡西姆大学、卡西姆以及利雅得的沙特国王大学进行了体外实验研究，研究对象为拔除的上颌和下颌前磨牙，随机分为三组。A组为对照组，对牙齿进行酸蚀和粘结；B组先进行漂白，再酸蚀和粘结；C组先进行漂白，然后用10%抗坏血酸钠溶液进行抗氧化处理，接着酸蚀和粘结。然后使用英斯特朗万能试验机对所有三组进行粘结强度测试和分析。使用SPSS 23进行数据分析。
共有60颗牙齿，每组20颗（33.3%）。C组的平均剪切粘结强度最高，为12.231±2.1兆帕，其次是A组，为10.948±2.1兆帕，B组为7.621±1.8兆帕。
抗氧化处理对牙齿漂白后正畸托槽的剪切粘结强度有积极影响。关键词：抗氧化剂；漂白；托槽；拔除的前磨牙；剪切粘结强度
