3种机械清洁方法对树脂外源性着色的清洁效果

目的评估3种机械清洁方法即电动牙刷配合清洁膏、牙膏或自来水刷洗对热固化型基托树脂外源性着色的清洁效果。方法制作60块热固化基托树脂试件,随机分成4组,用电子比色仪测色后,分别浸泡入蒸馏水(对照组)、绿茶、漱口水、黄连水中4周。再将后3组实验组各分成3组,分别以自来水、牙膏或清洁膏作为刷洗液,用电动牙刷刷洗10 min后再次测色。计算各组试件刷洗后与浸泡前的色差。方差分析法比较3种机械清洁方法对试件外源性着色的清除能力。结果刷洗方法及浸泡液种类均影响试件的颜色改变,各实验组试件表面颜色的改变与对照组相比均有显著性差异(P﹤0.05)。绿茶组中清洁膏与牙膏之间、牙膏与空刷之间无统计学意义(P﹥0.05),清洁膏与空刷之间有统计学差异(P﹤0.05)。漱口水与黄连水中3种清洁方法两两间均有显著性差异(P﹤0.05),且以清洁膏组试件表面色差最小,牙膏次之。结论 3种机械清洁方法清除热固化型基托树脂表面着色的效果有差异,以清洁膏效果最好。

Cleaning effectiveness of three mechanical methods cleaning exogenous tinting on heat-cured base resin

Objective To evaluate the wear resistant of base resin to three mechanical denture cleaning methods,namely cleaning with electric toothbrush as well as cleansing paste,toothpaste,or tap water.Methods 60 samples of heat-cured base resin were made and randomly divided into 4 groups.Color was measured with a colorimeter and then the samples were immersed into distilled water（control group）,green tea,dentilave and rhizoma coptidis for 4 weeks.3 experimental groups were divided into 3 subgroups,and cleaned with cleansing paste,toothpaste,or tap water separately.The samples were cleaned with electric toothbrush for 10 min,and then the colors were measured again.ΔE of each group was calculated and compared.The wear resistant of base resin to three mechanical denture cleaning methods was evaluated by ANOVA.Results Cleaning methods and immersion liquid all changed the colors of the samples.There was statistically significant difference in color difference between control group and experimental groups（P0.05）.There was no statistically significant difference between method with cleaning paste and method with toothpaste,as well as between method with toothpaste and tap water in the green tea group（P0.05）,while there was statistical difference in method with cleaning paste and method with running water in this group（P0.05）.There was statistically significant difference between each two of the three subgroups in dentilave group and rhizoma coptidis group（P0.05）.ΔE was smallest cleaned with cleaning paste,and biggest with tap water.Conclusions Three mechanical cleaning methods make difference in colors on the surfaces of heat-cured base resin,and the cleaning paste has the best cleaning effect.