三维成像与计算机辅助软件在单侧牙槽突裂的应用进展

牙槽突裂植骨术是牙槽突裂修复的金标准,随着唇腭裂患者及其家属对牙列美观度要求的提升,该手术在唇腭裂序列治疗中日益受重视,而精确并快速地测量术前牙槽突缺损体积、协助外科手术及评估术后移植骨组织吸收率,是目前牙槽突裂植骨术研究的热点及难点。三维CT是骨组织评估的可靠检查工具,已有实验对单侧牙槽突裂植骨术前后的三维图像进行研究分析。计算机辅助工程(CAE)技术逐渐用于协助三维图像的测量与评估。通过阐述近年来三维成像与计算机辅助软件在牙槽突裂的研究及应用,归纳总结牙槽突裂治疗中,三维成像与传统二维成像的优缺点及计算机辅助软件在单侧牙槽突裂中的应用。

Preparation of Aminated Macroporous Polyvinyl Alcohol Resins and Evaluation for Bilirubin Adsorption

In the present study we prepared macroporous polyvinyl alcohol beads. A series of bilirubin adsorbents were generated by immobilization of eight amine agents to the beads as ligands. The adsorption of bilirubin was evaluated by in vitro static and dynamic adsorption tests. The results show that these adsorbents have excellent adsorption efficiency and capacity. Among the eight ligands, trimethylamine （TMA）, triethylamine （TEA） and 1,6- hexanediamine （HDA） showed the highest adsorption capacity. The adsorption equilibrium can be achieved in half an hour, and the adsorption percentage of bilirubin was up to 80%. Static electricity and hydrophobie interaction played the main role in bilirubin adsorption, and the adsorption was found to match the monolayer model. The excellent adsorption of these adsorbents indicates their potential in clinical treatment.

河南口岸2例输入性登革热病例鉴定分析

对2017年河南口岸入境的2例发热归国人员进行医学巡诊和流行病学调查,提取2例发热归国者血清样本中核酸,进行实时荧光RT-PCR检测。结果显示,登革热病毒通用型核酸阳性,分型鉴定均为登革热病毒Ⅱ型核酸阳性,证实属于境外染疫,疫源地分别为斯里兰卡和泰国。随即对患者进行后续医疗援助,直至疾病康复无传染性。本结果提示应根据国际疫情动态变动形势,加强对口岸输入性病例精准防控。