渗透树脂对漂白后牙釉质表面结构、显微硬度及颜色的影响  

Effect of penetrating resin on the surface structure,microhardness and color of enamel after bleaching

作　　者：张迪[1] 李敏[1] 刘进[1] Zhang Di;Li Min;Liu Jin(Department of Endodontic and Periodontitis,The First Affiliated Hospital of Zhengzhou University,Zhengzhou 450052,China)

机构地区：[1]郑州大学第一附属医院牙体牙髓牙周病科,郑州450052

出　　处：《中华口腔医学杂志》2022年第5期509-515,共7页Chinese Journal of Stomatology

摘　　要：目的探讨渗透树脂对漂白后牙釉质表面结构、显微硬度及颜色的影响,为渗透树脂的临床应用提供参考。方法选择因正畸需要而拔除的前磨牙(郑州大学第一附属医院口腔颌面外科提供),通过随机排列表法随机分为A、B、C三部分,每部分再通过随机排列表法随机均分为对照组、树脂组、漂白组和联合组;对照组不做任何处理;漂白组和联合组行冷光美白处理;树脂组和联合组行渗透树脂处理。A部分在处理后即刻及处理后2周进行扫描电镜观察(每组每个时间点样本量为3);B部分在处理前、处理后即刻及处理后2周进行显微硬度测量(每组每个时间点样本量为8);C部分在处理前、处理后即刻及处理后1、2周进行色度测量,并计算各组处理后各时间点与处理前的色差(ΔE值)(每组每个时间点样本量为10)。结果扫描电镜显示,处理后即刻树脂组、联合组牙釉质表面平整光滑,除可见树脂覆盖外,其余与对照组基本一致;漂白组表面可见微孔状缺损和矿物质沉积;处理后2周各组牙釉质表面平整光滑无明显差别。处理后即刻对照组、树脂组、漂白组、联合组显微硬度分别为(354±33)、(364±21)、(411±30)、(350±17)HV(F=9.39,P<0.05),漂白组显著大于其他组(P<0.05),其余组间差异均无统计学意义(P>0.05);处理前和处理后2周4组显微硬度的总体差异均无统计学意义(F=0.34、2.75,P>0.05)。处理后即刻对照组、树脂组、漂白组、联合组ΔE值分别为0.00±0.00、2.29±1.86、7.20±1.94、8.00±0.88(F=74.21,P<0.05),除漂白组与联合组间差异无统计学意义(P>0.05)外,其余组间差异均有统计学意义(P<0.05)。对照组、树脂组、漂白组同组处理后各时间点ΔE值差异均无统计学意义(F=1.66、0.30、0.96,P>0.05)。联合组处理后即刻ΔE值显著大于处理后1、2周(t=4.73、4.23,P<0.05),处理后1和2周间ΔE值差异无统计学意义(t=0.75,P>0.05)。结论对健康�Objective To investigate the effect of permeable resin on the surface structure,microhardness and color of tooth enamel after bleaching.Methods Premolars extracted for orthodontic needs were selected(provided by the Department of Oral and Maxillofacial surgery of the first affiliated Hospital of Zhengzhou University)and randomly divided into A,B and C 3 groups.Each group was randomly divided into control subgroup,resin subgroup,bleaching subgroup and combined subgroup.Samples in the control subgroup did not receive any treatment.Those in the bleaching subgroup and combined subgroup were treated with cold light whitening.Those in the resin group and combined group were treated with permeable resin.Samples in the group A were observed by scanning electron microscope immediately after treatment and 2 weeks after treatment,and the microhardness of samples in the group B was measured before treatment,immediately after treatment and 2 weeks after treatment(the sample size of each time point was 8 in each subgroup).In group C,chromaticity was measured and chromatic aberration(ΔE value)was calculated before treatment,immediately after treatment and 1 and 2 weeks after treatment(10 samples in each subgroup).Results Scanning electron microscope showed that the enamel surface of the resin subgroup and the combined group was smooth immediately after treatment,which was basically the same as that of the control subgroup,but covered with resin,and microporous defects and mineral deposits could be seen on the surface of the bleaching subgroup.Two weeks after treatment,the enamel surface of each subgroup was smooth,there was no obvious difference.Immediately after treatment,the microhardness of the control subgroup,resin subgroup,bleaching subgroup and combined subgroup were(354±33),(364±21),(411±30)and(350±17)HV,respectively(F=9.39,P<0.05).The microhardness of the bleaching subgroup was significantly higher than that of the other subgroups(P<0.05).There was no significant difference in microhardness among the four subgroup

关 键 词：牙釉质 美学 牙科 复合树脂类 硬度 显微镜检查 电子 扫描 渗透树脂 冷光美白 

分 类 号：R783[医药卫生—口腔医学]