Abbassy Mona Aly, Bakry Ahmed Samir, Alshehri Nada Ibrahim, Alghamdi Thoria Mohammed, Rafiq Samiah Adnan, Aljeddawi Doha Hassan, Nujaim Danyah Saad, Hassan Ali Habib
Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
Department of Orthodontics Alexandria University, Alexandria, Egypt.
J Orthod Sci. 2019 Feb 20;8:5. doi: 10.4103/jos.JOS_93_18. eCollection 2019.
This study aimed at evaluating the effect of using a 45S5 bioglass paste and a topical fluoride as protective agents against acidic erosion (resembling acidic beverage softdrinks intake) for enamel surrounding orthodontic brackets.
Sample of 21 freshly extracted sound incisor and premolar teeth was randomly divided into three equal groups: a bioglass group (Bioglass) (NovaMin, 5-mm average particle, NovaMin Technology), a Fluoride group (Fluoride) (Gelato APF Gel, Keystone Industries), and a control group (Control). Orthodontic brackets were bonded to the utilized teeth usingMIP (Moisture Insensitive Primer) and Transbond PLUS color change adhesive. All specimens were challenged by 1% citric acid for 18 min. The top enamel surfaces next to the orthodontic brackets were examined by SEM-EDS. Wilcoxon Signed-Rank test was used to compare the area covered by the 45S5 bioglass paste before/after erosion < 0.05.
45S5 bioglass paste application resulted in the formation of an interaction layer that significantly resisted erosion challenge < 0.05. The fluoride and control specimens showed signs of erosion of the enamel next to the orthodontic brackets ( < 0.05).
45S5 bioglass paste can efficiently protect the enamel surfaces next to orthodontic brackets for acidic erosion challenges.
本研究旨在评估使用45S5生物玻璃糊剂和局部用氟化物作为保护剂，针对正畸托槽周围牙釉质抵抗酸性侵蚀（类似于摄入酸性饮料软饮料）的效果。
选取21颗新鲜拔除的健康切牙和前磨牙样本，随机分为三组：生物玻璃组（生物玻璃组）（NovaMin，平均粒径5mm，NovaMin技术公司）、氟化物组（氟化物组）（Gelato APF凝胶，Keystone工业公司）和对照组（对照组）。使用MIP（湿敏底漆）和Transbond PLUS变色粘合剂将正畸托槽粘结到所用牙齿上。所有标本用1%柠檬酸处理18分钟。通过扫描电子显微镜-能谱仪（SEM-EDS）检查正畸托槽旁边的牙釉质表面。采用Wilcoxon符号秩检验比较45S5生物玻璃糊剂侵蚀前后覆盖面积<0.05。
应用45S5生物玻璃糊剂形成了一个能显著抵抗侵蚀挑战的相互作用层<0.05。氟化物组和对照组标本显示正畸托槽旁边的牙釉质有侵蚀迹象（<0.05）。
45S5生物玻璃糊剂能有效保护正畸托槽周围的牙釉质表面免受酸性侵蚀挑战。
