螺旋CT及CAD技术在人工关节定制设计中的应用研究

随着生物医用材料研制和医学的迅速发展，以及生活水平、医疗保健、康复水平的提高，人们对自身组织、器官及骨骼缺损的修复和置换方面的要求日益提高，尤其对人造骨骼和人工关节的需求越来越广泛。由于计算机断层成像技术CT（computed tomography）已经成为显示和研究人体内部结构非常有用的手段，将计算机辅助设计技术CAD（Computer aided design）和计算机辅助工程CAE（Computer aided Engineering）等相关技术应用于人造骨骼和内置假体的设计，不仅可以提高产品的设计质量，同时，结合CT和计算机三维重建方法，     

前踝骨折诊治分析5例

踝部骨折是最常见的关节内骨折,约占全身骨折的3.9%[1]。自1998年4月至2004年3月收治单纯前踝骨折5例,现报告如下。1临床资料本组5例,均为男性;年龄18～24岁;左侧3例,右侧2例。受伤至住院时间为2h～1d,均为训练时从高处跳下垂直暴力所致。按Lauge-Hansen分类系统踝关节骨折分为     

前臂肌腱部分移位修复桡尺远侧关节脱位的应用解剖

目的为前臂肌腱部分移位修复桡尺远侧关节脱位提供解剖学依据。方法30侧成人上肢标本,将尺侧腕屈肌腱、尺侧腕伸肌腱、桡侧腕长伸肌腱、肱桡肌腱作形态学测量,将尺侧腕屈肌腱、尺侧腕伸肌腱进行力学测试。结果尺侧腕屈肌腱长(16.7±2.7)cm;尺侧腕伸肌腱长(14.9±2.5)mm;桡侧腕长伸肌腱长(19.0±2.0)cm;肱桡肌腱长(11.7±2.4)cm。力学测试:尺侧腕屈、伸肌腱其全肌腱破坏载荷分别为(2.4±0.9)Mpa、(3.1±0.9)Mpa,半肌腱破坏载荷分别为(2.2±0.9)Mpa、(2.5±0.8)Mpa,t检验无显著性差异。结论前臂肌腱部分转位有足够的长度和强度修复桡尺远侧关节脱位。     

自增强可吸收内固定治疗儿童肘部骨折

目的评价自增强可吸收内固定治疗儿童肘部骨折的可行性和有效性。方法2002年7月-2003年12月，25例儿童肘部骨折应用自增强可吸收内固定螺钉或棒固定，对其手术方法、骨折愈合、功能恢复进行回顾性分析总结。结果平均随访时间18个月（10-24个月）。所有骨折均于4周内达到临床愈合。1例肱骨髁上骨折因可吸收棒穿于皮下引起疼痛，妨碍关节活动，于术后6周拔除，恢复良好。1例肱骨内上髁骨折予可吸收螺钉固定，为保持骨折复位稳定，术后伸肘位石膏固定3周致关节僵硬，经CPM被动活动锻炼后肘关节活动基本恢复正常。其余病例在最后一次随访时，均关节活动良好，无畸形发生，也未见局部无菌性反应。结论自增强可吸收内固定治疗儿童肘部骨折可靠有效，近期随访效果满意，术后可早期进行功能锻炼。     

内镜辅助肋骨-软骨移植重建髁突与同期正颌手术的临床研究

目的 探讨内镜辅助肋骨-软骨移植重建髁突与同期正颌手术治疗严重颞下颌关节病变及牙颌面畸形的效果. 方法 于术前对患者进行临床检查和治疗设计,术中行Le Fort Ⅰ型截骨术、下颌支矢状骨劈开术、髁突等关节区病变的处理、内镜辅助下肋骨-软骨移植和颏成形术,术后进行随访. 结果 2003年9月至2005年12月,于临床应用15例,所有患者同期手术均顺利完成.术中、术后均无严重出血、神经损伤、受区感染等严重并发症发生.术后随访29～52个月,平均31.8个月,所有患者面容均显著改善,关节功能良好,且无关节区疼痛等主观症状,患者对手术疗效满意.术后张口度平均为33.6 mm,侧向运动度为0～6 mm. 结论 选择合适的适应证、设计合理的手术方案,内镜辅助髁突重建同期正颌手术效果较好.     

经肘外侧入路治疗Gartland Ⅲ型肱骨髁上骨折

1995年1月～2006年6月，我院采用肘外侧纵形切口、交叉克氏针内固定治疗Gartlandm型肱骨髁上骨折96例，取得较好效果。     

Pure isolated dorsal dislocation of the fifth carpometacarpal joint

Isolated pure dislocations of the fifth carpo-metacarpal joint are extremely rare injuries. The dorsal form was described in mere 12 cases. The diagnosis can be easily missed. The lesion is also often overlooked in the routine diagnostic X-ray. Lateral and oblique views are important for the recognition of the true extent of the lesion. Treatment of these injures is still controversial and both closed reduction with percutaneous pinning or open reduction with internal fixation are advocated. The goal of treatment is early reduction and fixation of the metacarpal. Early diagnosis is the key to success. The aim of this paper is to review literature and present two new cases.     

踝关节骨折54例手术治疗分析

踝关节骨折临床较为常见，由于踝关节承受全身重量，需有良好的稳定性和灵活性，处理不当易出现踝关节不稳及创伤性关节炎而致踝关节功能受损。我院自1999年1月至2002年8月，手术治疗各种踝关节骨折脱位54例，现报告如下。     

A comparison of two rehabilitation protocols after total knee arthroplasty: does flexion affect mobility and blood loss?

We report a prospective trial comparing the effectveness of a post-operative flexion regime versus a standard extension regime on the early outcome and on the post-operative blood loss of total knee arthroplasty. Fourty-eight knees were divided to two different post-operative rehabilitation regimes: a flexion regime and an extension regime. The two groups were well matched with respect to age, gender, operation side and pre-op diagnosis All patients were implanted with a NexGen cemented total knee prosthesis and all operations were performed by the same surgeon. Patients were assessed pre-operatively, at the time of discharge, at 6 weeks and at 12 weeks, and were evaluated by means of the Knee Society Score (KSS) and the WOMAC score, the Clarkson criteria for range of motion and muscolar strength measurement, and the Verbal Numeric Scale (VNS) for the pain. Futhermore, postoperative blood loss was assessed by comparing the volume of blood in the drain at the time of their removal and measuring the difference in preoperative and postoperative blood haemoglobin (Hb) in the 2 groups. Patients subjected to the flexion regime had a better KSS and Womac score after 12 weeks and had less post-operative blood loss, requiring fewer blood transfusions. No differences were found between the two groups in terms of pain and muscolar strength. We believe a flexion regime after a total knee arthroplasty is a valid option of rehabilitation treatment and does not result in an increase in wound problems.