摘要
目的:探讨次氯酸钠与酒精消毒对酸蚀过程中牙釉质的影响,为正畸治疗提供参考。方法:收集离体恒牙60颗,随机分为2组(A和B组),每组各30颗,A组采用5.25%次氯酸钠预处理,B组采用75%酒精预处理;经分组处理后,A和B组再分别随机分为3组(A0、A1、A2和B0、B1、B2组),每组各10颗,分别采用37%磷酸酸蚀0、15和30s。取离体乳牙40颗,随机分为2组(C和D组),每组各20颗,C组采用5.25%次氯酸钠预处理,D组采用75%酒精预处理;经分组处理后,C和D组再分别随机分为2组(C0、C1组和D0、D1组),每组各10颗,分别采用37%磷酸酸蚀0和30s。超声清洗离体牙,扫描电镜(SEM)观察釉质微观形态,检测各组釉质表面孔隙直径,测量各组样品抗剪切力强度,并进行组间比较。结果:各组釉质表面孔隙直径比较差异均有统计学意义(P<0.01)。恒牙实验组中A2组牙釉质孔隙直径最大(P<0.01),表面蛋白残留较少,釉质暴露充分,且抗剪切力强度最大(P<0.01);B1组孔隙直径最小(P<0.01),且表面蛋白残留较多,抗剪切力强度最小(P<0.01)。乳牙实验组中C1组釉质孔隙直径最大(P<0.01),且表面残留蛋白较少,抗剪切力强度最大(P<0.01);D1组釉质孔隙直径最小(P<0.01),且表面蛋白残留较多,抗剪切力强度最小(P<0.01)。结论:与常用酒精消毒方法比较,采用5.25%次氯酸钠预处理牙釉质30s可明显增加釉质表面粗糙度和清洁度,并增强正畸托槽粘结强度。
Objective:To investigate the influence of sodium hypochlorite and alcohol disinfection in the enamel during acid etching,and to provide reference for the orthodontic treatment.Methods:Sixty extracted permanent teeth were selected and randomly divided into two groups(group A and group B),with 30 teeth in each group.The teeth in group A were pretreated with 5.25% sodium hypochlorite and the teeth in group B were pretreated with75% alcohol.After pretreatment,group A and group B were randomly divided into three groups(groups A0,A1,A2,B0,B1,and B2),with 10 teeth in each group and the teeth were etched with 37% phosphoric acid for 0,15 and 30 s.Forty extracted deciduous teeth were selected and randomly divided into 2 groups(group C and D),with20 teeth in each group.In group C,the teeth were pretreated with 5.25% sodium hypochlorite;in group D,the teeth were pretreated with 75% alcohol.After pretreatment,group C and group D were randomly divided into two groups(groups C0,C1,D0,and D1)with 10 teeth in each group,and the teeth were etched with 37% phosphoric acid for 0 and 30 s.The morphology of enamel was observed by scanning electron microscope(SEM)after the extracted teeth were cleaned with ultrasound;the pore diameters of enamel surface were detected and the shear strength of samples in each group was detected.Results:The differences in pore diameters between various groups were statistically significant(P<0.01).In the permanent teeth test group,the pore diameter in group A2 was the maximum(P<0.01),the surface protein residues were less,and the enamel was fully exposed,and the shear strength was the highest(P<0.01).The pore diameter in group B1 was the minimum(P<0.01),the surface protein residues were more,and the shear strength was the lowest(P<0.01).In the deciduous teeth test group,the pore diameter in group C1 was the maximum(P<0.01),the surface protein residues were less,and the shear strength was the highest(P<0.01).The pore diameter in group D1 was the minimum,and the surface protein residues were more,and the shear strength was the lowest(P<0.01).Conclusion:Compared with the traditional alcohol disinfection method,pretreatment of 5.25% sodium hypochlorite in tooth enamel for 30 scan significantly increase the surface roughness and cleanliness of enamel,and enhance the shear strength of orthodontic bracket.
作者
公柏娟
罗淞元
GONG Baijuan;LUO Songyuan(Department of Orthodontics,Stomatology Hospital,Jilin University,Changchun 130021,China)
出处
《吉林大学学报（医学版）》
CAS
CSCD
北大核心
2019年第2期370-375,共6页
Journal of Jilin University：Medicine Edition
基金
国家科技部重点研发项目资助课题(2016YFC1102804)
关键词
次氯酸钠
酸蚀
牙釉质
扫描电子显微镜
sodium hypochlorite
acid etching
enamel
scanning electron microscope
