Cervitec治疗老年人因牙齿磨损致牙本质过敏症的疗效观察

目的：评价cervitec治疗老年人因牙齿磨损引发的牙本质敏感症的临床疗效。方法：对老年人敏感牙齿分别用cervitec（实验组66颗）和75％氟化钠甘油糊剂（对照组62颗）进行脱敏,4次为一个疗程,观察其即刻、1个月、3个月的疗效。结果：实验组与对照组在即刻疗效上的差异无统计学意义,在1个月、3个月的疗效,两者间差异具有统计学意义。结论：cervitec在治疗老年人因牙齿磨损引发的牙本质过敏症中短期疗效显著。     

实时剪切波弹性成像技术检测颈动脉斑块弹性参数的对照研究

目的 量化分析体内、外不同环境对颈动脉粥样硬化斑块弹性参数检测的影响.方法 应用SWE技术对3例拟行颈动脉内膜剥脱术患者在术前、术后分别对粥样硬化斑块相同取样区域进行测量,获得810个弹性参数的平均值,量化分析比较在体和离体条件下斑块弹性模量的差异性和相关性.结果 在体组帧间变异系数(CVA)变化范围为0.043~0.432,离体组帧间变异系数(CVB)变化范围为0.005~0.093.在体组组内相关系数(CCA)变化范围为0.678~0.815,离体组组内相关系数(CCB)变化范围为0.755~0.999 (P均小于0.01).两组间剪切波速度的平均值差异有统计学意义(P=0.005 2),两组结果呈直线正相关关系,相关系数r为0.880,决定系数R2=0.775 (P=0.002).结论 实时剪切波弹性成像技术检测人体颈动脉粥样硬化斑块的弹性参数,结果稳定、可靠.人体内的复杂环境对剪切波弹性成像技术检测颈动脉斑块的弹性参数结果存在一定的影响,该影响遵循一定的规律.     

Clinical effect of tip-edge plus appliance in children with angle II1 malocclusion

The effects of Tip-Edge plus appliance in the treatment of Angle Ⅱ1 malocclusion and the mechanism were investigated. Fifty-two Angle Ⅱ1 children, aged from 12.3-14.2 years, with mandibu- lar retrusion in permanent dentition were selected and treated with Tip-Edge plus appliance. Lateral cephalometric films taken before and after treatment were analyzed. The arithmetic mean and standard deviation were calculated for each variable. Paired t-test was performed to evaluate the significant treatment change. Results showed that the average treatment time was 16 months. Normal overjet and overbite were established with retroclination of upper incisors and proclination of lower incisors. U1-NA was decreased by 15.4° （P〈0.01）. ANB and Y axial angle were decreased significantly （P〈0.05） Soft tissue measurements showed that FCA and UL-E were decreased dramatically （P〈0.05）, and LL-E was increased significantly （P〈0.05）. Remarkable soft tissue change was noted after the treatment and convex facial profile changed to the straight profile. In conclusion, Tip-Edge plus technique can quickly and efficiently correct anterior bite and lateral outlook.     

剪切波弹性成像技术检测颈动脉粥样硬化斑块弹性参数的可靠性评价

目的：评价剪切波弹性成像技术对颈动脉粥样硬化斑块弹性参数检测的可靠性。方法应用剪切波弹性成像技术对3例颈动脉粥样硬化患者的斑块在体进行弹性检测,获得135个剪切波传播速度的平均值。结果帧间变异系数(CV)变化范围为0.04~0.43,帧间变异性较小。组内相关系数(CC)变化范围为0.68~0.89,P值为0.002~0.005。对每例患者进行的三次检测的剪切波传播速度值之间的差异有统计学意义,三次测量速度值之间有较高的相关性。结论剪切波弹性成像技术检测颈动脉粥样硬化斑块弹性参数的结果比较可靠,可重复性较好。