摘要
目的观察氟化物对漂白治疗中牙体硬组织微结构的影响,探讨氟化物用于减轻漂白治疗中牙齿敏感的可行性及其作用机制。方法选取临床因正畸治疗需拔除4颗健康第一前磨牙的患者共12名,按处理方法不同随机分为3组:加氟化钠漂白组、漂白组和空白组。在不同处理后分别制备釉质、牙本质纵剖面和横剖面电镜观察标本,以扫描电镜观察其超微结构改变情况。结果电镜显示漂白组釉质表面出现溶融、脱矿现象;牙本质纵剖面可见管周牙本质轻微脱矿,管间牙本质胶原纤维网架塌陷;横剖面见牙本质小管口因脱矿而呈现不规则,小管径增大。加氟化钠漂白组釉质及牙本质的脱矿程度均减轻,牙本质小管口小于漂白组。结论局部应用氟化钠可减轻釉质表层及牙本质脱矿,降低牙体硬组织通透性,从而缓解漂白过程中所产生的牙齿敏感症状。
Objective To evaluate the effects of fluorid on morphology change in enamel and dentin during tooth bleaching. Methods The study population consisted of twelve patients who required the extraction of first premolars for orthodontic reasons. Twelve participants were divided into three groups： bleaching with NaF-treated group, bleaching-treated group and control group. Immediately after bleaching treatment, all teeth were extracted and prepared for scanning electron microscope （SEM）. Morphologic observations were carried out with SEM. Results In the bleaching-treated group, mild demineralization was observed on the surface of enamel and collapse of collagen scaffold was also observed on the longitudinal section of dentine. The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralized. In the bleaching with NaF-treated group, the demineralization of enamel and dentin were reduced and some diameter of dentinal tubule were smaller than bleaching-treated group. Conclusion Fluoride can reduced the demineralization of enamel and dentine obviously, which may be applied as a therapeutic tool for sensitivity induced by tooth bleaching.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2007年第3期230-232,共3页
West China Journal of Stomatology
关键词
氟
漂白
扫描电镜
釉质
牙本质
fluoride
bleaching
scanning electron microscope
enamel
dentin
