Mas-López Ana-Carolina, Robles-Ruíz Julissa, Arriola-Guillén Luis-Ernesto
Orthodontic student, School of Dentistry, Universidad Científica del Sur, Lima, Perú.
MSc and Associate Professor of the Division of Orthodontics, Universidad Científica del Sur, Lima, Perú.
J Clin Exp Dent. 2024 Aug 1;16(8):e947-e952. doi: 10.4317/jced.61807. eCollection 2024 Aug.
In the search for alternatives to increase the bond strength of brackets, when necessary, this study proposes to apply the enamel deproteinization protocol to eliminate the proteins in the surface enamel to achieve better etching patterns and thereby increase bond strength. The aim of this study was to evaluate the effect of sodium hypochlorite as a deproteinizing agent on the bond strength of metal brackets.
Forty bovine teeth were randomly and equally divided into two groups. The experimental group (n=20) underwent a deproteinization treatment with sodium hypochlorite at 5.25% for 60 seconds prior to acid etching of the enamel with 37% phosphoric acid and bracket bonding with Transbond XTTM resin. The control group (n=20) underwent enamel etching with 37% phosphoric acid and bracket bonding with Transbond XTTM resin. Shear strength and the adhesive remnant index were evaluated and the Students t and Chi-square tests were used (<0.05).
The bond strength values of the control group (27.72±6.42 Mpa) were not significantly lower compared to the experimental group (29.21± 7.96 Mpa) (=0.259). The adhesive remnant index showed a similar behavior in both groups, with the amount of adhesive remaining on the enamel being less than 50% in most samples of both the control and experimental group.
Deproteinization treatment of bovine tooth enamel with 5.25% sodium hypochlorite for 60 seconds prior to enamel acid etching does not improve the bond strength of a resin in orthodontic bracket bonding. Deproteinization, sodium hypochlorite, bracket bonding, orthodontics.
在寻求提高托槽粘结强度的替代方法时，本研究建议应用牙釉质脱蛋白方案来去除表面牙釉质中的蛋白质，以获得更好的酸蚀模式，从而提高粘结强度。本研究的目的是评估次氯酸钠作为脱蛋白剂对金属托槽粘结强度的影响。
40颗牛牙随机等分为两组。实验组（n = 20）在使用37%磷酸酸蚀牙釉质并用Transbond XT TM树脂粘结托槽之前，先用5.25%的次氯酸钠进行60秒的脱蛋白处理。对照组（n = 20）使用37%磷酸酸蚀牙釉质并用Transbond XT TM树脂粘结托槽。评估剪切强度和粘结剂残留指数，并使用学生t检验和卡方检验（<0.05）。
对照组的粘结强度值（27.72±6.42 Mpa）与实验组（29.21±7.96 Mpa）相比，差异无统计学意义（P = 0.259）。两组的粘结剂残留指数表现相似，对照组和实验组的大多数样本中，牙釉质上残留的粘结剂均少于50%。
在牙釉质酸蚀前，用5.25%次氯酸钠对牛牙牙釉质进行60秒的脱蛋白处理，并不会提高正畸托槽粘结中树脂的粘结强度。脱蛋白、次氯酸钠、托槽粘结、正畸学。
