目的:比较Super bond C&B,Fuji Ⅱ,MTA三种材料粘结离体单根管前牙纵裂牙根的粘结强度。方法:选取离体单根管前牙75颗制备成纵裂牙根模型后按数字随机表分成6组。1～3为压力组(每组15颗牙):1组,MTA充填裂缝;2组,Super bond C&B...目的:比较Super bond C&B,Fuji Ⅱ,MTA三种材料粘结离体单根管前牙纵裂牙根的粘结强度。方法:选取离体单根管前牙75颗制备成纵裂牙根模型后按数字随机表分成6组。1～3为压力组(每组15颗牙):1组,MTA充填裂缝;2组,Super bond C&B充填裂缝;3组,则用Fuji Ⅱ行裂缝充填。4～6为拉力组(每组10颗牙):4组,MTA充填裂缝;5组,Super C&B充填裂缝;6组,则用Fuji Ⅱ行裂缝充填。用万能力学测试机测定各试件数值,用SPSS 10.0软件包对检测结果进行统计学分析。结果:压力测试显示:Superbond C&B充填纵裂牙根,其抗压能力明显高于MTA组和FujiⅡ组,而后两组之间无明显差异;拉力测试表明:MTA组抗拉能力最差,Fuji Ⅱ组明显高于MTA组但明显低于Super bondC&B组。结论:Super bond C&B粘结离体纵裂牙根的强度最强,抗压和抗拉能力优于FujiⅡ和MTA。展开更多
目的评价使用两种不同粘结夹板系统(Super Bond C&B系统及RTD石英纤维夹板)对慢性牙周炎患者松动下前牙行牙周夹板固定的临床疗效对比。方法 33名下前牙出现松动的慢性牙周炎患者,接受牙周基础治疗后1个月进行牙周探查记录临床指标...目的评价使用两种不同粘结夹板系统(Super Bond C&B系统及RTD石英纤维夹板)对慢性牙周炎患者松动下前牙行牙周夹板固定的临床疗效对比。方法 33名下前牙出现松动的慢性牙周炎患者,接受牙周基础治疗后1个月进行牙周探查记录临床指标作为基线,之后随机分组,试验组采用Super Bond C&B系统(17例)、对照组采用RTD石英纤维夹板(16例)进行牙周夹板固定松动下前牙。在完成固定后3、6个月复查时进行牙周探查,评价两组间牙周指标的变化,并对固定后患牙舒适性和美观性的患者感受进行评估。结果在半年的观察期内,试验组有2例出现松脱,调整咬合及再粘结后无松脱。对照组未出现松动。治疗后两组间牙周临床指标均有明显改善,两组间无显著性差异,试验组的患者舒适程度明显高于对照组。结论 Super Bond C&B和RTD石英纤维夹板均可以有效进行慢性牙周炎患者松动下前牙的牙周夹板固定,Super Bond C&B具有较好的美观性和舒适性,但机械强度较弱。展开更多
In this article, the authors report on the use of Radio Frequency (RF) Magnetron Sputtering combined with Plasma-Based Ion Implantation (PBII) technique to synthesize the Boron-Carbon (B-C) films. High purity of boron...In this article, the authors report on the use of Radio Frequency (RF) Magnetron Sputtering combined with Plasma-Based Ion Implantation (PBII) technique to synthesize the Boron-Carbon (B-C) films. High purity of boron carbide (99.5%) disk was used as a target with an RF power of 300 W. The mixtures of Argon (Ar)-Methane (CH4) ware used as reactive gas under varying CH4 partial flow pressure at the specified range of 0 - 0.15 Pa and fixed total gas pressure and total gas flow at 0.30 Pa and 30 sccm, respectively. The effect of CH4 flow ratio on the friction coefficient of B-C films was studied. The friction coefficient of the film depended on the concentration of B. When it was 10% or lower, the coefficient decreased to 0.2 or lower. In this concentration range of B, the specific wear rate also decreased to the order of 10-7 mm3/Nm, and excellent wear resistance was displayed.展开更多
文摘目的:比较Super bond C&B,Fuji Ⅱ,MTA三种材料粘结离体单根管前牙纵裂牙根的粘结强度。方法:选取离体单根管前牙75颗制备成纵裂牙根模型后按数字随机表分成6组。1～3为压力组(每组15颗牙):1组,MTA充填裂缝;2组,Super bond C&B充填裂缝;3组,则用Fuji Ⅱ行裂缝充填。4～6为拉力组(每组10颗牙):4组,MTA充填裂缝;5组,Super C&B充填裂缝;6组,则用Fuji Ⅱ行裂缝充填。用万能力学测试机测定各试件数值,用SPSS 10.0软件包对检测结果进行统计学分析。结果:压力测试显示:Superbond C&B充填纵裂牙根,其抗压能力明显高于MTA组和FujiⅡ组,而后两组之间无明显差异;拉力测试表明:MTA组抗拉能力最差,Fuji Ⅱ组明显高于MTA组但明显低于Super bondC&B组。结论:Super bond C&B粘结离体纵裂牙根的强度最强,抗压和抗拉能力优于FujiⅡ和MTA。
文摘目的评价使用两种不同粘结夹板系统(Super Bond C&B系统及RTD石英纤维夹板)对慢性牙周炎患者松动下前牙行牙周夹板固定的临床疗效对比。方法 33名下前牙出现松动的慢性牙周炎患者,接受牙周基础治疗后1个月进行牙周探查记录临床指标作为基线,之后随机分组,试验组采用Super Bond C&B系统(17例)、对照组采用RTD石英纤维夹板(16例)进行牙周夹板固定松动下前牙。在完成固定后3、6个月复查时进行牙周探查,评价两组间牙周指标的变化,并对固定后患牙舒适性和美观性的患者感受进行评估。结果在半年的观察期内,试验组有2例出现松脱,调整咬合及再粘结后无松脱。对照组未出现松动。治疗后两组间牙周临床指标均有明显改善,两组间无显著性差异,试验组的患者舒适程度明显高于对照组。结论 Super Bond C&B和RTD石英纤维夹板均可以有效进行慢性牙周炎患者松动下前牙的牙周夹板固定,Super Bond C&B具有较好的美观性和舒适性,但机械强度较弱。
文摘In this article, the authors report on the use of Radio Frequency (RF) Magnetron Sputtering combined with Plasma-Based Ion Implantation (PBII) technique to synthesize the Boron-Carbon (B-C) films. High purity of boron carbide (99.5%) disk was used as a target with an RF power of 300 W. The mixtures of Argon (Ar)-Methane (CH4) ware used as reactive gas under varying CH4 partial flow pressure at the specified range of 0 - 0.15 Pa and fixed total gas pressure and total gas flow at 0.30 Pa and 30 sccm, respectively. The effect of CH4 flow ratio on the friction coefficient of B-C films was studied. The friction coefficient of the film depended on the concentration of B. When it was 10% or lower, the coefficient decreased to 0.2 or lower. In this concentration range of B, the specific wear rate also decreased to the order of 10-7 mm3/Nm, and excellent wear resistance was displayed.
