氟化物对离体着色牙漂白效果影响实验研究  

In vitro study of fluoride preconditioning in attenuating sensitivity induced by tooth bleaching

作　　者：潘利锋[1] 周卫兵[1] 刘怀宇[1] 孙珊珊[1] 安建平[2] 

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：《中国实用口腔科杂志》2013年第8期477-480,共4页Chinese Journal of Practical Stomatology

摘　　要：目的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。方法选取2010年1月至2012年7月就诊于第三军医大学大坪医院野战外科研究所口腔科，因正畸治疗需要拔除第一前磨牙的12例患者的36颗离体牙，用标准茶溶液染色后，其中12颗样本经NaF处理后用过氧化脲进行漂白（A、B组），12颗样本使用过氧化脲漂白（C、D组），12颗样本放入去离子水中作为空白对照（E、F组）。用VITA比色板对受试牙漂白前后进行比色，然后分别从近远中向（A、C、E组）和唇舌向（B、D、F组）剖开，使用图像分析软件测量并比较剩余染色面积百分比。结果所有标本染色后色度均增加，着色范围为3．66～8．33个色阶。漂白治疗后A、B、C、D组的色阶改变为5～5．53个色阶。而空白对照（E、F组）无色阶改变。（1）近远中向剖开：A组唇侧剩余染色面积为28．6％～39．4％，舌侧剩余染色面积为58％～72％；C组唇侧剩余染色面积为29．3％～37．2％，舌侧剩余染色面积为57．6％～70．1％；E组两剖面显示全部牙本质均匀染色，面积百分比约96．97％～100％；A、C组间各剖面差异无统计学意义（P〉0．05），而二者与E组的差异均有统计学意义（P〈0．05）。（2）唇舌向剖开：B组唇侧和舌侧剖面剩余染色面积基本相等，为61．7％～68．7％；D组两剖面剩余染色面积为60．8％～66．3％，反映出相同的颜色改变的深度；F组两剖面染色面积为96．4～99．8％；B、D组间差异无统计学意义（P〉0．05），但与F组间差异均有统计学意义（P〈0．05）。结论着色牙漂白前局部氟化物处理对漂白效果无明显影响。Objective To investigate whether the use of sodium fluoride before bleaching regimen would decrease bleaching efficacy of HP 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 internal- ly with a standardised tea solution; 12 specimens were power bleached with light activated 35% hydrogen peroxide and 12 were placed in water; another 12 specimens were bleached by same agents after using 2%NaF. Both exposure times were 30 min. Vita shade guide was employed prior to and after tea staining and after power bleaching/water treatments. Eighteen specimens each from three group 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 using image analy- sis software. Results 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 （97% - 100% coverage）. Conclusion The use of sodium fluoride before each bleaching regi- men does not affect the bleaching efficacy of hydrogen peroxide. Hydrogen peroxide bleaching gel demonstrates bleach- ing into dentine of uniform depth and there is no difference between the groups receiving the placebo and the fluoride treatment.

关 键 词：氟化物 漂白 色阶 剩余染色面积 

分 类 号：R78[医药卫生—口腔医学]