目的观察清水与牙膏刷牙的效果,为选择清水刷牙提供理论依据。方法采用纳入和排除的评价标准对志愿者进行基线检查,将70名志愿者随机分为2组,实验组和对照组。实验前由一名指定的牙科医生检查两组志愿者的Turesky等改良的Quigley-Hein...目的观察清水与牙膏刷牙的效果,为选择清水刷牙提供理论依据。方法采用纳入和排除的评价标准对志愿者进行基线检查,将70名志愿者随机分为2组,实验组和对照组。实验前由一名指定的牙科医生检查两组志愿者的Turesky等改良的Quigley-Hein菌斑指数（Quigley-Hein plaque index modified by turesky,TQHPI）以及牙龈指数（gingival index,GI）,并且对两组受试者进行Bass刷牙方法的指导教育。实验开始后,实验组采用统一指定牙膏刷牙,对照组采用清水刷牙,每日刷牙2次,每次3-5 min。实验周期为8周,8周后分别检查两组志愿者的TQHPI和GI。结果 70例受试者中,实验前两组TQHPI以及GI的差异无显著性意义（P〉0.05）。实验后两组的TQHPI和GI较实验前均有明显降低（P〈0.05）。实验后两组的TQHPI和GI差异均无显著性意义（P〉0.05）。结论在采用正确有效的刷牙方法（Bass刷牙法）前提下,使用或不使用牙膏对菌斑清除效果的影响无明显差异。展开更多
目的:评价不同参数的Er:YAG激光与脱敏牙膏联合应用对牙本质小管的封闭效果。方法:选择新鲜拔除的完整人第三磨牙6个制备成24个0.8 mm厚的牙本质片,随机分为4组:A组(对照)、B组(单纯Er:YAG激光照射,40 m J),C组(激光40 m J联合脱敏牙膏...目的:评价不同参数的Er:YAG激光与脱敏牙膏联合应用对牙本质小管的封闭效果。方法:选择新鲜拔除的完整人第三磨牙6个制备成24个0.8 mm厚的牙本质片,随机分为4组:A组(对照)、B组(单纯Er:YAG激光照射,40 m J),C组(激光40 m J联合脱敏牙膏组),D组(激光60 m J联合脱敏牙膏)。SEM观察牙本质片。结果:SEM显示,A组牙本质小管口开放,管径一致;B组牙本质表面部分呈熔融状,部分牙本质小管口被封闭或缩小;C组牙本质表面呈熔融样均匀改变,牙本质小管口关闭的数量增加;D组牙本质表面呈熔融样均匀改变,几乎所有的牙本质小管口都呈封闭状态,牙本质表面未见裂隙或碳化等过熔融的表现。结论:适当能量和照射时间的Er:YAG激光与脱敏牙膏联合应用较单独使用Er:YAG激光能产生更好的牙本质小管封闭效果。展开更多
Aim: 1] Comparative evaluation of the linear depth of induced remineralized lesions after subjecting to fluoride supplements and 2] To assess the average fluorescence at both the demineralized and the remi-neralized z...Aim: 1] Comparative evaluation of the linear depth of induced remineralized lesions after subjecting to fluoride supplements and 2] To assess the average fluorescence at both the demineralized and the remi-neralized zones in all the three study groups under confocal laser scanning microscope. Method: Forty five sound human premolars extracted for orthodon-tic reasons were decoronated 1 mm below the ce-mento-enamel junction and coated with nail varnish except for a 3 × 3 mm window on the buccal surface. The samples were placed in 50 ml of de mineralizing solution at pH 4.6 for 96 hours. Following deminera-lization, the lower half of the 3 × 3 mm window in all the samples were covered with nail varnish to serve as control. The samples were randomly divided into three groups of fifteen teeth each (n = 15) and speci-mens in group A[Nfd] were remineralized using non-fluoridated dentifrice [control], those in groups B [Fd5] and group C [Fd10] using 500 ppm and 1000 ppm of fluoride containing dentifrice, respectively. The specimens were subjected to a 20 day reminera-lization treatment regimen and were sectioned into 100 μm thick sections and two images were captured on the buccal surface from either side of the midpoint of occluso-cervical length using confocal laser scan-ning microscope [CLSM]. Results: were tabulated and statistically analyzed by Anova. Study concluded that 1000 ppm fluoridated dentifrice showed a greater degree of remineralization than other groups and confocal laser scanning microscopes gives promising results in the diagnosis of early enamel lesions over the conventional methods.展开更多
文摘目的观察清水与牙膏刷牙的效果,为选择清水刷牙提供理论依据。方法采用纳入和排除的评价标准对志愿者进行基线检查,将70名志愿者随机分为2组,实验组和对照组。实验前由一名指定的牙科医生检查两组志愿者的Turesky等改良的Quigley-Hein菌斑指数（Quigley-Hein plaque index modified by turesky,TQHPI）以及牙龈指数（gingival index,GI）,并且对两组受试者进行Bass刷牙方法的指导教育。实验开始后,实验组采用统一指定牙膏刷牙,对照组采用清水刷牙,每日刷牙2次,每次3-5 min。实验周期为8周,8周后分别检查两组志愿者的TQHPI和GI。结果 70例受试者中,实验前两组TQHPI以及GI的差异无显著性意义（P〉0.05）。实验后两组的TQHPI和GI较实验前均有明显降低（P〈0.05）。实验后两组的TQHPI和GI差异均无显著性意义（P〉0.05）。结论在采用正确有效的刷牙方法（Bass刷牙法）前提下,使用或不使用牙膏对菌斑清除效果的影响无明显差异。
文摘目的:评价不同参数的Er:YAG激光与脱敏牙膏联合应用对牙本质小管的封闭效果。方法:选择新鲜拔除的完整人第三磨牙6个制备成24个0.8 mm厚的牙本质片,随机分为4组:A组(对照)、B组(单纯Er:YAG激光照射,40 m J),C组(激光40 m J联合脱敏牙膏组),D组(激光60 m J联合脱敏牙膏)。SEM观察牙本质片。结果:SEM显示,A组牙本质小管口开放,管径一致;B组牙本质表面部分呈熔融状,部分牙本质小管口被封闭或缩小;C组牙本质表面呈熔融样均匀改变,牙本质小管口关闭的数量增加;D组牙本质表面呈熔融样均匀改变,几乎所有的牙本质小管口都呈封闭状态,牙本质表面未见裂隙或碳化等过熔融的表现。结论:适当能量和照射时间的Er:YAG激光与脱敏牙膏联合应用较单独使用Er:YAG激光能产生更好的牙本质小管封闭效果。
文摘Aim: 1] Comparative evaluation of the linear depth of induced remineralized lesions after subjecting to fluoride supplements and 2] To assess the average fluorescence at both the demineralized and the remi-neralized zones in all the three study groups under confocal laser scanning microscope. Method: Forty five sound human premolars extracted for orthodon-tic reasons were decoronated 1 mm below the ce-mento-enamel junction and coated with nail varnish except for a 3 × 3 mm window on the buccal surface. The samples were placed in 50 ml of de mineralizing solution at pH 4.6 for 96 hours. Following deminera-lization, the lower half of the 3 × 3 mm window in all the samples were covered with nail varnish to serve as control. The samples were randomly divided into three groups of fifteen teeth each (n = 15) and speci-mens in group A[Nfd] were remineralized using non-fluoridated dentifrice [control], those in groups B [Fd5] and group C [Fd10] using 500 ppm and 1000 ppm of fluoride containing dentifrice, respectively. The specimens were subjected to a 20 day reminera-lization treatment regimen and were sectioned into 100 μm thick sections and two images were captured on the buccal surface from either side of the midpoint of occluso-cervical length using confocal laser scan-ning microscope [CLSM]. Results: were tabulated and statistically analyzed by Anova. Study concluded that 1000 ppm fluoridated dentifrice showed a greater degree of remineralization than other groups and confocal laser scanning microscopes gives promising results in the diagnosis of early enamel lesions over the conventional methods.
