摘要
目的:目前国内外对氟斑牙的研究主要集中在流行病学调查和临床疗效分析,对其漂白后釉质表面脱矿程度的研究却鲜有报道。观察不同程度人氟斑牙电镜下微观结构的特点,了解冷光美白对不同程度人氟斑牙釉质表面的影响,探讨冷光美白对重度氟斑牙的安全性。方法:选择因牙周病拔除的完整无龋坏的正常牙10颗,人各型氟斑牙50颗,选取颊侧典型区域制备标本。氟斑牙标本按Dean氏分类法分为轻、中、重度3组,正常牙标本作为对照组。各组标本随机分为4个亚组,A组:不做任何处理;B组:釉质表面蚀刻;C组:釉质剖面蚀刻;D组:釉质表面冷光美白,扫描电镜下观察标本的表面形貌。结果:轻度氟斑牙釉柱间隙增宽,少量晶体排列紊乱,晶间隙增宽。重度氟斑牙釉质表面凹凸不平,呈弹坑状或蜂窝状,釉柱轮廓不清,晶体排列紊乱甚至消失。中度氟斑牙居于二者之间。冷光美白后,正常牙和氟斑牙釉质表面低倍镜下均未见明显改变,高倍镜下散在浅碟状凹坑;中重度氟斑牙还伴有大量粟粒状小孔。结论:随着氟斑牙严重程度的加重,釉质表层损害程度加重。冷光美白造成釉质表层的轻微脱矿,氟斑牙稍重于正常牙。从结构和漂白后釉质表面脱矿程度方面进一步探讨氟斑牙的表面结构特点,从而为氟斑牙的临床治疗提供基础数据。
Objective： At present,internal and external research in dental fluorosis is mainly concentrates on the epidemiological investigation and clinical efficacy analysis.However,the extent of cold light whitening after the enamel surface demineralization is very rarely reported.The purpose of this study was to observe the microscopic structure of different degrees of human dental fluorosis,to explore the effect of cold light whitening on fluorosis enamel surface,and to explore cold light whitening safety of the treatment of severe dental fluorosis.Methods： 10 complete normal teeth and 50 various types of dental fluorosis without decay were selected as specimens in this experiment.All specimens were chosen from the typical buccal regional.Dental fluorosis specimens were divided into mild,moderate and severe according to the Dean＇s classification and normal teeth were used as the control group.Each group was randomly divided into four sub-groups： Group A： no treatment;Group B： etching enamel surface;Group C： etching enamel profile;Group D： cold light whitening enamel surface.We observed the morphology of specimens by scanning electron microscopy.Results： Enamel column gap of mild fluorosis widened with small amount of crystal disordered arrangement and grain gap widened.Enamel surface of severe fluorosis were uneven,which appeared as crater or honeycomb.The outline of enamel column was unclear,besides,crystals arranged in disorder or even disappear.Moderate fluorosis was in the between.After cold light whitening,enamel surface of all teeth showed no significant change under low magnification and scattered shallow pits under high magnification.Moreover,moderate and severe fluorosis were also accompanied by a large number of miliary holes.Conclusion： With the aggravation of the severity of dental fluorosis,the enamel surface was damaged severity.Result displayed that cold light whitening can cause enamel surface demineralization,which was more serious in dental fluorosis.Further exploration of the characteristics of the surface structure of dental fluorosis after deminera-lization from enamel surface structure and cold light whitening,could provide the basic data for the clinical treatment of dental fluorosis.
出处
《现代生物医学进展》
CAS
2013年第15期2928-2935,共8页
Progress in Modern Biomedicine
关键词
氟斑牙
扫描电子显微镜
牙釉质
冷光美白
Dental fluorosis
Scanning electron microscope
Enamel
Cold light whitening
