直丝弓矫治器和Begg矫治器治疗安氏Ⅱ类1分类错[牙合]畸形疗效比较

目的:对比不同矫治器对错[牙合]畸形患者面高度及前后牙咬合关系的影响。方法:选取于笔者医院接受矫治的83例错[牙合]畸形患者,根据患者矫治器类型分为直丝弓组和Begg组,分别为42例和41例。比较并分析两组患者治疗前后牙咬合关系、硬组织、磨牙及面高度的变化情况。结果:矫治后,两组患者OJ-PPV、OB-PP、LMA-MPV、LMA-MPV均降低,Begg矫治组OJ-PPV水平显著高于直丝弓矫治组,OB-PP、LMA-MPV、LMA-MPV水平显著低于直丝弓矫治组,差异均具有统计学意义(P<0.05);两组患者LAFH、LAFH/TAFH、PFH/TAFH水平均升高,其中Begg矫治组患者LAFH水平显著低于直丝弓矫治组,差异均具有统计学意义(P<0.05);两组患者LMA-MP、LMC-MP水平均升高,差异具有统计学意义(P<0.05);矫治前后,两组患者SNA、SNA、ANB水平均无统计学差异(P>0.05)。结论:两种矫治器对错[牙合]畸形患者硬组织变化均无明显影响,其中Begg矫治对患者前后牙咬合关系改善作用更强,直丝弓对患者面高度的改善能力更强。     

Identification of the medial femoral safe zone for drilling during dynamic hip screw side plate fixation: A CT angiogram tracing of the profunda femoris artery

Objectives

Iatrogenic injury of the Profunda Femoris Artery (PFA) at time of hip fixation surgery can increase morbidity and mortality and prolong the hospital stay. This is an injury that tends to pass unnoticed as a cause of postoperative deterioration despite being frequently reported in the literature. Our study aims to describe the anatomy of the PFA in relation to the medial femoral cortex with specific emphasis on its orientation relative to the position of a sliding hip screw side plate construct. By doing so we are able to present clear guidance to orthopaedic surgeons on how to avoid iatrogenic PFA injury at the time of hip fracture fixation.

Migration of a Kirschner wire from the greater trochanter to the popliteal fossa: a case report

Migration of Kirschner (K) wires from the upper extremity joints has often been reported, but it is less common from the lower extremities. In this report, we describe an 85-year-old man treated, during a hip replacement procedure, with a K-wire because of a trochanteric fracture; after one year, the K-wire was found in the popliteal fossa. This report illustrates the first case of K-wire migration in the popliteal area of the knee and suggests avoiding the use of free K-wires without any tension banding.     

踝关节骨折腓骨钢板的后方固定

目的：探讨踝关节骨折中腓骨钢板固定的位置。方法：2001年1月～2003年1月共手术治疗踝关节骨折患者75例，仅对其中随访资料完整的48例患者进行分析。随访10～24个月，平均15个月。采用Baird和Jackson的踝关节评分系统评定踝关节术后疗效。结果：所有的患者均取得了良好的骨折愈合。术后疗效为优24例，良17例，可5例，差2例。优良率为85、4％。结论：腓骨钢板的后方放置可以减少缝合时的张力，钢板有更好的软组织覆盖，钢板无须过多塑形，固定比较牢固。     

改良术式综合治疗陈旧性髌骨骨折

目的探讨陈旧性髌骨骨折的治疗方法。方法对11例陈旧性髌骨骨折进行回顾性总结,采用保留髌骨,切开复位,松解粘连,改良张力带钢丝或/和聚髌器坚强的内固定,术后配合CPM机康复锻炼。结果11例全部随访,随访0.5～4.5年,根据胥少汀等制定的评定标准,优4例,良5例,优良率81.8%。结论不做髌骨切除,松解粘连、良好的对位,坚强的内固定,早期配合应用CPM机进行功能锻炼,可取得满意的疗效。     

Visual fixation offsets affect both the initiation and the kinematic features of saccades

It is well known that the removal of a fixation point prior to the presentation of a peripheral target dramatically reduces saccadic reaction time (SRT). This effect has become known as the “gap effect”. The present study examined several detailed kinematic variables to determine whether the removal of the fixation point also affects the manner in which saccades are produced. The findings indicate that saccades that were initiated after the removal of the fixation point had higher average velocities and reached greater peak velocities, accelerations, and decelerations than did saccades produced in the presence of the fixation point. The results suggest that the removal of the fixation point may affect the force-time curves of saccades in addition to affecting the time needed to initiate the saccades. Received: 21 February 1997 / Accepted: 24 July 1997     

The Doppler guide wire: clinical applications in neuroendovascular treatment

The application of Doppler-tipped guide wires to measure blood flow velocity in coronary and peripheral arteries has been described previously as a valuable means of functional assessment in interventional cardiological procedures. In animal studies intravascular Doppler has been used in the cerebrovascular system, and this appears to be an important field of application for this new technique. We used intravascular haemodynamic monitoring by the Doppler guide wire during neuroendovascular procedures in patients with different cerebrovascular diseases and evaluated the clinical feasibility of the method. We found it a safe technique which complements morphological angiographic information with valuable functional data. Further studies may be expected to demonstrate the relation of flow parameters to clinical outcome. Received: 16 January 1996 Accepted: 30 January 1996     

膝前框形钢丝内固定治疗髌骨骨折

目的　总结采用钢丝环扎 +膝前方框形张力带钢丝内固定法治疗髌骨骨折的经验和临床效果。方法　对 3 5例髌骨骨折应用此方法治疗 ,其中男性 2 4例 ,女性 11例 ,3 0例获得 3～ 2 4个月随访。结果　优 19例 ,良 10例 ,可1例 ,优良率 96 7%。术后未出现骨折再移位 ,无伤口感染。愈合时间 6～ 12周。结论　该方法符合生物力学原理 ,操作简便 ,适应证广 ,能早期关节活动 ,是治疗髌骨骨折的理想方法之一。     

Anterior Cruciate Ligament Reconstruction: State of the Art

Abstract The rupture of the Anterior cruciate ligament (ACL) belongs to the most common ligament injuries of the human knee joint. ACL rupture results in an increased anterior translation and internal rotation of the tibia. Untreated knee instability causes a disintegration of the roll and sliding movement and a high incidence of secondary meniscus and chondral damages with consecutive or advanced arthritic changes. For deciding on a conservative or operative therapy, it is necessary to develop a high-risk profile. Elderly, inactive patients without instability symptoms can be treated conservatively; younger, active people and complex ligament injuries should receive an ACL replacement. The goal is to eliminate instability by maintaining the physiological kinematics of the knee. Anterior cruciate ligament may be reconstructed arthroscopically assisted by autologous tendons. Predominantly, hamstring- and bone-patellar-tendon grafts are used. No significant differences in knee laxity, clinically and functionally, were observed between both grafts. Various reconstruction techniques, single- or double-bundle techniques, were described. Successful replacement depends on a correct tunnel placement and reconstruction of the physiological band tension, a sufficient mechanical stability of fixation, an impingement-free range of motion and an adequate rehabilitation. A high degree of patient satisfaction in clinical and functional outcome could be evaluated.     

压力导丝在冠状动脉内支架置入中的意义

目的　通过与血管内超声 ( IVUS)相比较 ,探讨压力导丝在评价冠脉内支架置入即刻效果 ,指导优化支架置入中的作用。方法　 5 1例患者置入冠脉内支架后先后予血管内超声和压力导丝检测判断是否达到相应的理想支架置入标准。若未达标准 ,则进一步采用更高压力同样球囊或更大球囊再扩张。结果　支架置入后 IVUS判断 3 1例达到标准 ,不需再扩张 ,15例不满意者再扩张支架 ,支架内截面积增加 2 4 .3 % ( P<0 .0 5 ) ,最终 4 1例 ( 89% )得到满意 IVUS,5例因超声导管未跨过支架无超声资料 ;压力导丝检测 3 5例达到标准 ,不需再扩张 ,16例不满意者再扩张支架最终 4 5例 ( 88% )得到满意结果 (心肌部分血流储备 ,FFRmyo>0 .90 )。血管内超声和压力导丝两者在判定理想支架置入方面有很好的相关性 ,符合率达 90 %。以血管内超声检测作金标准 ,应用受试者工作特性曲线 ( ROC)计算心肌部分血流储备 FFRmyo预测理想支架置入的最佳临界点为 0 .90。结论　压力导丝是指导冠脉支架置入更方便、安全的有效手段 ,有广泛推广应用的价值