铸造支架联合NITI悬臂梁矫正舌倾下颌磨牙的临床效果评价

目的 评价NITI悬臂梁在矫正舌倾下颌磨牙中的临床效果。方法 选择16例单侧下颌第二磨牙舌倾的病例为研究对象,带垫铸造支架连接双侧下颌后牙,提供颌内支抗、解除咬合锁结,0.018英寸×0.025英寸或0.019英寸×0.025英寸NITI悬臂梁提供颊向旋转力矩和压低力。采用Graphpad Prism 6.0 软件对治疗前、后所测数据进行配对 t 检验。结果 所有患牙均获得直立,牙轴变化24°±1.2°（P<0.01）,近中舌尖到正中矢状面垂直距离变化（3±0.8） mm（P<0.05）,牙周状况良好,咬合关系稳定。结论 铸造支架联合NITI 悬臂梁可提供有效力学机制,矫正舌倾下颌磨牙。     

Framing the child at risk

Risk Assessment Reports are one form of accounting practice which delineate the space of risk considered in a child abuse neglect investigation. The paper analyses two Risk Assessment Reports, contrasting what is reported, what is directly observed and what is hypothesized and implied by child protection practitioners during the assessment of risk. From an analysis of these two reports (each 4 – 5 pages long), the paper identifies the rhetorical strategies and their realizations used by two practitioners in framing the child at risk. The paper problematizes the tension between the institutional need to constrain the exercise of professional judgement through Risk Assessment Models, and the extent to which practitioners actually localize the framing of risk to specific areas of investigation.     

同种异体骨支撑架微创治疗股骨头坏死的临床研究

目的应用改良髓芯减压术结合同种异体骨支撑架加自体骨和脱钙骨基质（decalcified bone matrix，DBM）治疗早期股骨头坏死，探索早期股骨头坏死的微创治疗方法。方法2004年1月～2005年4月，23例24个髋关节采用经大转子下通过股骨颈钻隧道至股骨头骨坏死区，将装有自体松质骨和DBM的同种异体骨支撑架经隧道拧入骨坏死区直至软骨下骨约5mm处，隧道远端用自体髂骨填塞。观察手术前后Harris评分变化、x线影像学表现及是否需进一步治疗。结果本组所有患者均获得随访，平均随访19（12—27）个月，以最后一次随访资料作为最终评价依据。Harris评分，术前优良率为43．5％（10／23）。术后优良率为91．3％（21／23）。22侧髋关节影像学表现保持稳定，无明显并发症发生。结论同种异体骨支撑架植入结合自体松质骨和DBM治疗成人股骨头坏死，增加了股骨头负重区软骨下骨的机械支撑，成骨作用强，有利于股骨头坏死的修复与重建，同时，不破坏患者股骨头本身的血液供应，创伤小，操作简单，值得临床推广使用。     

Stereotactic craniotomy and intraoperative lesion localisation using the Brown-Robert-Wells frame

Summary A simple technique of stereotactic craniotomy and intraoperative lesion localisation that uses the Brown-Robert-Wells (BRW) stereotactic frame is presented. The method optimises craniotomy placement and facilitates localisation of small intracerebral lesions. Using the system, 16 patients have had resection of intracranial neoplasms from deep and/or eloquent areas of the brain with no neurological morbidity.     

多功能验光试镜装置的研制

本文介绍了一种多功能验光试镜装置的设计和应用，通过比较，得出该试镜架比之传统器械具有的优势，在可调散光轴位、可调瞳距、可调镜腿、可调鼻托方面更方便、简捷，且重量轻更加契合人体生理特点，进一步满足临床对眼镜度数的检查需要。最后提出了一些改进意见。     

A newly designed attachment device of multipurpose frame for neuronavigator

Summary A newly designed attachment device of the multipurpose head frame (Sugita) for Neuronavigator (Watanabe) is presented with an illustrative case of glioblastoma in an eloquent area. This has extended the usefulness of the neuronavigator for those who prefer and use the multipurpose head frame, while the requirements for keeping a stereotactic combination and the original concept of the multipurpose head frame, as well as that of the neuronavigator have been kept undisturbed.     

跷式骨科牵引架的研制和应用

目的 研制一种一架通用的骨科牵引架。方法 在我们发明的跷式下肢骨折牵引架的基础上，结合人体各部位牵引治疗的不同需要，对各构件进行多用途改造设计并新增构件，使其在需要时能重新组成各种类型的牵引架，材料选用金属。结果 经6次样机实验与修改，研制出可应用于全身各部位牵引的跷式骨科牵引架，结构包括可拆卸和重组的主件(主架，副架，基架)和辅件(L形架、功能扩张板、稳定杆)以及各种连接件等。经102例的住院、门诊和家庭患者的应用，重组功能和疗效均达到了要求，效果满意。结论 一台(架)具备全部骨科牵引架功能的装置(跷式骨科牵引架)的设计和制造是能实现的，并能获得良好的应用效果。     

基于线性调频信号的高帧率超声成像系统

基于有限衍射波束的高帧率超声成像系统能实现快速成像，但由于仅通过一次发射事件成像，信噪比较低，本研究针对该问题提出一种改进方案。它采用合成孔径雷达中所使用的线性调频信号作为激励信号，在接收端则利用线性调频信号的脉冲压缩比等于信号的时间带宽积的特征，将接收信号通过匹配滤波器处理。结果表明该方案不仅能显著提高成像系统的信噪比，改善重构图像的质量，增加成像深度，而且不损失分辨率。     

内窥镜立体视觉的实现

借助虚拟现实技术发展的成果，结合计算机立体显示技术，研究开发了双目成像法内窥镜立体显示技术。研究了双目成像法模型，设计出新型三维电子内窥镜的头端和视频系统，使医生能够观察到立体的内窥镜图像。     

Effect of iron on the surface, degradation and ion release properties of phosphate-based glass fibres

Phosphate-based glass fibres (PGF) have the unique characteristic of being completely soluble in an aqueous environment, releasing bioactive and biocompatible ions. They have been proposed as tissue engineering scaffolds for craniofacial skeletal muscle regeneration, where myoblasts are seeded directly onto the fibres. Studies have shown that these cells have a preference in their initial attachment to fibres of certain composition and size, which in turn control the rate of degradation. This study investigated the relationship between the surface properties, degradation properties and ion release (cationic and anionic species) by altering the chemical composition of the PGF. Iron oxide (Fe2O3) was incorporated into glasses containing P2O5 (50 mol%), CaO (30 mol%) and Na2O (20 mol%). Six glass compositions with Fe2O3 ranging from 0 to 5 mol% by replacing the equivalent Na2O mol% were investigated. Contact angle measurements showed that polar interactions occurring on the glass surfaces diminished with increasing Fe2O3 content. This behaviour was reflected in the estimated surface energies of the glasses, where the overall surface energy decreased with increasing Fe2O3 content due to the decrease in polar or acid/base component. The incorporation of up to 5 mol% Fe2O3 into PGF resulted in a significant reduction in the degradation rate (by two orders of magnitude), which can be related to the formation of more hydration resistant P-O-Fe bonds. However, the degradation rate increased with decreasing fibre diameter (comparing average diameters of 31.6 +/- 6.5 microm versus 13.1 +/- 1.3 microm) for a given mass of fibre, and this is related to the surface area to volume ratio. Taken together the results suggest that fibres with the larger diameters and containing 3-5 mol% Fe2O3 could initially be a more durable scaffold than ones with 1 or 2 mol% Fe2O3 for initial cell attachment.