冷光美白治疗正畸托槽粘结部位色斑疗效的实验研究冷光美白治疗正畸托槽粘结部位色斑疗效的实验研究[摘要]目的:研究冷光美白治疗对正畸后托槽粘结部位不规则色斑的疗效。方法:离体牙20颗,分成A、B两组,各10颗。A组酸蚀后采用牙釉质粘结剂剂粘结托槽,B组直接采用玻璃离子粘结。将两组离体牙人工染色4周后,拆除托槽并进行冷光美白处理。处理前后分别采用Crystaleye分光光度记型全牙比色仪测量x[关键词]冷光美白;正畸;托槽;染色;色斑;色差[]R783[文献标识码]A[]1008-6455(2014)15-1281-03Theexperimentalstudyoftheeffectofbeyondcold-lightwhiteningonthestainsintheadhesiveareaoforthodonticbracketsZHANGHai-yanl,XTNGXu-na2,GUODong-xiao2(1.DepartmentofProsthodontics,ZhengzhouStomatologyHospitai,Zhengzhou450000,Henan,China;2.DepartmentofProsthodontics,SchoolofStomatology,ZhengzhouUniversity)Abstract:ObjectiveTostudythecurativeeffectofcold-lightwhiteningontheirregularstainsofthebondedareaoforthodonticbracketsafterbeingfixed.MethodsThemethodistodivide20vitroteethintogroupAandgroupB,eachincluding10.ThebracketsofgroupAareboundedwithenameladhesiveafteretching,whileglassionicisuseddirectlybygroupB.Afterbeingdyedforfourweekstheteetharetakenout.Thebracketsareremovedandwhitenedbycold-1ight.Thecolorimetricvalueofthesamplesismeasuredbeforeandafterthetreatmentthroughthespectrophotometriccolorcomparator,recordthemeasuredL*,a*,b*,andthechromaticaberrationdeltaEiscalculatedrespectivelybeforeandafterwhitening.SPSS17.0softwareisusedtomakeastatisticalanalysis.ResultsThechromaticaberrationdeltaEinthetwosamplesisbothabove3.7.L*value,a*valueb*valuechangeobviously,whichhavestatisticalsignificance(P<0.05);Thedifferencesbetweenthevaluesofchromaticaberrationbeforeandafterwhiteningtreatmentinbothsampleareofnostatisticalsignificance(P>0.05).ConclusionCold-lightwhiteningtreatmentcaneffectivelyremovetheirregularstainsintheboundedareaoforthodonticbrackets.Keywords:cold-lightwhiteningtreatment;orthodontictreatment;bracket;dye;stains越来越多的成年人和青少年通过正畸治疗获得了排列整齐的牙齿[1],但正畸治疗后托槽粘结部位经常会出现不规则的色斑或颜色加重现象,严重影响了美观,因此正畸治疗后美白治疗成为患者的迫切要求。本研究通过评价冷光美白对正畸治疗后不同粘结材料托槽粘结部位色斑的疗效,以期为临床正畸患者矫治后的牙齿美白治疗提供一定的理论基础和临床指导。1资料和方法1.1一般资料:离体前磨牙20颗。纳入标准:选择患者年龄14〜28岁,正畸拔除的活髓前磨牙,牙体完整无隐裂、齿禺坏,无结石、色素沉着;牙面颜色均匀,非四环素牙、氟斑牙等。前磨牙托槽20个(MASEL公司,美国)。1.2仪器与试剂:Beyond冷光美白仪、Crystaleye分光光度记型全牙比色仪。Beyond冷光美白套装、自配人工唾液(按照ISO10271[2]标准配置)、自制染色剂。1.3方法1.3.1实验方法:将20颗离体牙按照单双编号法随机分为A、B两组,每组10颗。A组采用牙釉质粘结剂,粘结前使用37%磷酸酸蚀30s。B组采用玻璃离子粘结剂,粘结前不进行酸蚀。将A、B两组已粘结托槽的离体牙牙根分别包埋于蜡基托中,然后将所有样本浸泡于人工染色剂中,于37°C恒温水箱中4周,每周更换•次染色剂。4周后去除托槽及粘结剂,用超声波洁牙机去除残留的粘结剂后抛光10so<!--endprint--><!--startprint-->在样本颊面涂布Beyond美白凝胶,厚度2~3mni,调整Beyond冷光美白仪工作头,使其距离样本颊面约Icni垂直照射10min,然后用强吸唾吸去牙面Beyond美白凝胶,冲洗、吹干;重复操作2次,最后彻底清洗、吹干后在牙面涂抹氟保护剂,保留5min;清洁样本颊面后用抛光杯蘸取适置抛光膏抛光10s。3讨论本实验采用的颜色描述系统为国际照明委员会(CIE)1976年规定的L*a*b标准色度系统。L*a*b标准色度系统是-个定...