氟化物对牙本质漂白深度影响的实验研究  

Experimental study of the effect of fluoride on tooth bleaching

作　　者：潘利锋[1] 安建平[2] 周卫兵[1] 

机构地区：[1]北京军区北戴河疗养院口腔科,河北秦皇岛066100 [2]第三军医大学大坪医院口腔科,重庆400042

出　　处：《口腔医学》2014年第7期535-538,共4页Stomatology

摘　　要：目的通过实验观察氟化物对过氧化脲类漂白剂渗透性及漂白效果的影响。方法 36颗离体牙样本使用标准茶溶液染色、VITA比色板比色后,12颗样本使用35%过氧化脲漂白,12颗样本NaF处理后再行漂白,12颗样本放入去离子水中作为空白对照。治疗时间均为30 min。比色后分别从近远中向和唇舌向剖开,使用图像分析软件测量、比较其剩余染色面积。结果两组离体牙漂白后牙齿色阶改变无显著性差异;对比NaF漂白组和漂白组之间的近远中向剖面染色面积和唇舌向两剖面剩余染色面积,漂白组和NaF漂白组对牙本质的漂白深度无显著性差异。结论着色牙漂白术前局部应用氟化物并不影响漂白效果和漂白深度。Objective To observe the influence of fluoride on the permeability and the bleaching effect of such bleach as Carbamide peroxide ; to evaluate whether the use of 2 percent sodium fluoride before bleaching would decrease bleaching efficacy of CP when compared with a placebo and to confirm the applicability and reliability of the fluoride in clinic. Methods The crowns of 36 caries and developmental defect free human maxillary incisors were stained internally with a standard tea solution and colorimetric analysis was done with VITA shade guide. 12 specimens were bleached with light activated 35% hydrogen peroxide and another 12 were bleached by the same agents after using 2% NaF. 12 others were placed in ionized water （ control group）. The exposure time was all 30 mins. Vita shade guide （SG） was employed before, after tea staining and after power bleaching/water treatments. Eighteen specimens from three groups were sectioned mesio-distally. An additional 18 specimens from the bleach and the control group were sectioned labio-palatally. The stain area for each specimen was measured and compared with image analysis software. Results There was no significant difference in the change of color gradation after bleaching between two groups and there was no significant difference in bleaching depth of dentine between the bleaching group and NaF bleaching group. With tea staining,the mean changes in Vita shade guide units （SGU） ranged from 3.66 to 8.33. Samples bleached and sectioned mesio-distally showed stain coverage of 28.6% -39.4% ,while palatal sections showed stain coverage of 58% -72%. Control samples, whether sectioned mesio-distally or labio-palatally, showed staining throughout the dentine. Conclusions The use of fluoride partly before bleaching does not have influence on bleaching effect or depth.

关 键 词：氟化物 漂白 色阶 剩余染色面积 

分 类 号：R781.05[医药卫生—口腔医学]