Intraarticular migration of a broken biodegradable interference screw after anterior cruciate ligament reconstruction

Poly-l-lactic acid biodegradable screws have been used effectively for graft fixation in anterior cruciate ligament (ACL) reconstruction. The overall complication rate associated with the use of this implant is low, although some authors reported complications, such as osteolysis and aseptic effusion of the knee joint. We report a case of a 29-year-old female patient with a failure of a biodegradable interference screw at 22 months after ACL reconstruction using bone–patellar tendon–bone graft. In this illustrated case, the screw broke and migrated into the knee joint. In addition, we performed a detailed review of the medical literature from 1990–2005 to identify possible causes of biodegradable screw failures. We identified six published cases of bioabsorbable interference screw failure with migration into the knee joint. Several authors have reported small diameter of the screw, poor bone quality, bone resorption, and screw divergence as potential causes for intraarticular migration of metallic interference screws. With regard to bioscrews, no specific risk factors for screw breakage and intraarticular migration have been reported. ACL reconstruction with the use of bioabsorbable interference screws for fixation is considered to be reliable. However, we need to be aware of potential problems associated with the use of this implant. Early recognition of bioscrew failure may prevent associated morbidities, such as subsequent cartilage damage.     

Removal of a femoral interference screw that migrated posteriorly,using a posterior trans-septal portal: a case report

Few cases have been reported in which the femoral interference screw has migrated into the posterior compartment after an ACL reconstruction. It usually requires removal, because it leads usually to mechanical symptom. However, the arthroscopic removal of a screw is a technically demanding procedure, especially in the case of the femoral interference screw that has migrated into the femoral notch (posterior compartment), an intact integrated ACL graft or one that is encapsulated around the screw. We present a case in which a displaced femoral interference screw migrated within the posterior compartment 11 years postoperatively, after the graft had been incorporated at the femoral site. Although it is often technically challenging, through the use of a posterior trans-septal portal, we can successfully remove a displaced femoral interference screw even in the most difficult locations in the posterior compartment.     

Pretibial ganglion-like cyst formation after anterior cruciate ligament reconstruction: a consequence of the incomplete bony integration of the graft?

We report a case of subcutaneous pretibial ganglion, with direct communication to the tibial tunnel after an autologous reconstruction of the anterior cruciate ligament with hamstring tendons. The tibial graft fixation was with a 9 mm poly-L-lactide interference screw 5 years earlier. The screw had undergone complete resorption at the time the cyst occurred. No joint inflammatory reaction or graft insufficiency was detected. The patient underwent cyst excision and curettage of the tibial tunnel with full recovery. This complication seems to be the consequence of a direct communication between the joint and the pretibial subcutaneous tissue through a fibrous tibial tunnel and would have occurred, as there is no full osteointegration of the graft due to the resorption of the bioabsorbable interference screw.     

Arthroscopic reduction and internal fixation of acetabular fractures

Arthroscopic reduction and screw fixation of acetabular fractures have not been reported. In this case report, arthroscopic treatment for acetabular fracture is reported for two patients. A 49-year-old man diagnosed with acetabular posterior wall fracture was treated by arthroscopic reduction and fixation using two screws. A 20-year-old woman who diagnosed with anterior column fracture was fixed using a screw using the arthroscopic technique prior to open reduction and internal fixation in the iliac bone fracture. Arthroscopic reduction and fixation in some case of acetabular fracture could be good indication with additional advantages of joint debridement and loose body removal. Level of evidence V.     

不等距无头加压螺纹钉治疗Hoffa骨折

目的探讨不等距无头加压螺纹钉治疗Hoffa骨折的效果。方法 2010年6月-2012年12月,我院共收治Hoffa骨折5例,其中外髁骨折3例,内髁骨折1例,双髁骨折1例。患者均为男性;年龄17-54岁,平均年龄35.8岁。5例行前正中切口切开复位,不等距无头加压螺纹钉内固定治疗,术后第2d拔管,开始主动和被动活动锻炼,术后2个月逐渐下地负重行走。结果 5例均获随访,随访时间4-30个月,平均15个月。骨折均获骨性愈合,功能恢复参照Letenneur方法进行评估,优良4例,可1例。本组无深部感染、内固定松动和关节僵直发生。结论临床上Hoffa骨折比较少见,股骨外髁发生率高于股骨内髁,双髁骨折更少见。不等距无头加压螺纹钉把持力强,无头结构适合股骨髁部骨折,可以达到骨折端解剖复位、坚强稳定的内固定及早期功能锻炼,术后临床效果良好。     

An unusual case of foreign body knee that spontaneously migrated inside and out of the joint: arthroscopic removal

Cause of acute knee pain and locking episodes in a young sports person can be due to foreign bodies which penetrated unnoticed into the joint cavity. Here we report an unusual injury of this kind where a glass foreign body remained in the subcutaneous tissue for many years and then migrated late into the knee joint cavity. Complaints occurred for the first time in adult age. Arthroscopy revealed a circular defect in the posterior capsule beyond which a 1.6 cm glass foreign body was lying in an extra capsular location. The late and episodic migration of the glass piece into the joint from its extracapsular location produced symptoms of acute pain and locking. There is no reported case of such spontaneous and episodic migration of a glass foreign body inside and out of the knee joint resulting in acute episodes of pain and locking during sporting activity mimicking a torn meniscus or a chondral lesion. This report highlights the importance of accurate history taking, thorough physical examination, besides describing this unusual extra capsular location of the glass foreign body during arthroscopic surgery.     

Lateral ankle fracture with missed proximal tibiofibular joint instability (Maisonneuve injury)

We present a case of a soccer player who sustained a lateral ankle fracture and the associated proximal anterolateral tibiofibular joint instability (Maisonneuve injury) was overlooked. After a non-contact injury the (incomplete) diagnosis of a lateral malleolar fracture (type Weber B, AO 44-B1) was made and the patient was surgically treated with open reduction and internal fixation including a distal syndesmosis screw. After removal of the syndesmosis screw (six weeks after surgery) the patient suffered from activity-related pain around the fibular head. After thorough clinical and radiologic examination, temporary screw transfixation of the fibular head and capsular repair under meticulous fluoroscopic control of fibular rotation helped to restore patient’s sport activity level. This case report emphasizes the importance of precise clinical examination for detection of a proximal tibiofibular joint instability. Restoration of a well functioning and stable proximal tibiofibular joint may be difficult to achieve in previously operated and missed instabilities. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Arthroscopic screw fixation of large anterior glenoid fractures

Ten patients after traumatic shoulder dislocation with resulting instability due to an acute anterior glenoid fracture involving at least 21 percent of the glenoid length were treated by arthroscopic screw fixation of the fragment. The average fragment size measured 26.2% of the glenoid length. Pre- and postoperative radiographic evaluations were performed with three-dimensional CT scans. A cannulated titanium screw system was used for fragment fixation. All ten patients were followed up radiographically and, by evaluation of the Rowe score, clinically after a minimum of 2 years. At follow-up the Rowe score averaged 94 points. According to the rating scale, seven patients had an excellent result, two patients a good result, and one, fair result. In all patients CT scan confirmed that the fracture had healed in an anatomical position. One patient had one episode of traumatic redislocation with a positive apprehension test at follow up. In one case, removal of the screw was necessary due to mechanical impingement. We recommend this arthroscopic technique allowing for closed reduction and internal screw fixation of large anterior glenoid fractures, ensuring anatomical fracture healing and gleno-humeral joint stability.     

Intracranial penetrating injury by screw driver: A case report and review of literature

Penetrating injury to the head, with the exception of missile injuries is rare owing to thick calvarium. Orbital and temporal areas are comparatively vulnerable to penetrating injuries, due to their relative thinness. A case is presented in which a man killed his wife by forcefully thrusting a screw driver into her cranial cavity. The deceased presented to the hospital with the screw driver embedded in her head. She was declared as ‘brought dead on arrival’ at the emergency of the hospital. Pre-autopsy plain radiography and Computed Tomography (CT) of the head were done to assess the extent of brain damage. The peculiarity of this case lies in the fact that screw driver as a stabbing weapon in the head is very rarely used. In such cases, there is a need to perform radiography and CT with the weapon in-situ for better interpretation on injuries. In this paper role of radiography and CT in intra cranial penetration is discussed with review of literature.     

后路椎弓根螺钉治疗齿状突骨折伴可复性寰枢椎脱位

目的 总结后路寰枢椎椎弓根螺钉固定、复位、融合治疗齿状突骨折伴可复性寰枢椎骨折脱位的疗效.方法 对27例齿状突骨折伴可复性寰枢椎骨折脱位的患者经术前颅骨牵引,采用后路椎弓根螺钉,行寰枢椎复位、固定及植骨融合.结果 患者寰枢椎椎间稳定性得到恢复,无并发症发生;随访12-48个月(平均24个月),27例患者均获骨性融合.结论 经后路寰枢椎椎弓根螺钉固定融合术可为齿状突骨折伴可复性寰枢椎骨折脱位的患者提供牢固的三维固定,是一种更为有效的治疗方法.     

关节镜下带线锚钉与空心拉力螺钉内固定治疗胫骨髁间嵴撕脱骨折的疗效评价

目的对比分析关节镜下不同内固定方法治疗胫骨髁间嵴撕脱骨折的疗效,为临床治疗提供参考。方法选取钦州市中医医院骨科2014年5月—2015年7月收治的胫骨髁间嵴撕脱骨折患者42例为研究对象,随机抽签法分为锚钉组和螺钉组各21例,锚钉组患者行关节镜下带线锚钉治疗,螺钉组患者行关节镜下空心拉力螺钉内固定治疗,观察两组患者术后切口愈合、膝关节功能变化以及膝关节活动范围。结果两组患者术后切口均I期愈合,无感染情况出现。术后均成功获得随访,随访时间1年以上,术后即刻X线检查示骨折复位良好。术后3个月复查骨折均骨性愈合,无患肢功能障碍。术前两组患者膝关节功能评分差异无统计学意义(P0.05),术后膝关节功能评分均显著提高(P0.05),但锚钉组膝关节功能评分(92.97±3.15)与螺钉组(89.94±3.28)差异无统计学意义(P0.05)。术前两组患者膝关节活动范围差异无统计学意义(P0.05),术后膝关节活动范围显著增加(P0.05),但锚钉组膝关节活动范围(120.6±11.0)与螺钉组(118.5±10.7)差异无统计学意义(P0.05)。结论胫骨髁间嵴撕脱骨折关节镜下带线锚钉和空心拉力螺钉内固定治疗均有很好效果,带线锚钉固定无需二次手术取出,操作简单。     

旋前外旋型踝关节骨折损伤特点及疗效分析

目的探讨旋前外旋型踝关节骨折的损伤特点及手术治疗疗效。方法回顾性分析2011年1月—2014年2月手术治疗的21例旋前外旋型踝关节骨折患者,男性11例,女性10例;平均年龄33.9岁(16~57岁)。阅读X线片及CT等影像学资料,判断是否合并后踝骨折、下胫腓联合分离、胫距关节脱位及胫距关节面是否粉碎,采取Baird-Jackson踝关节功能评定标准判定手术疗效。结果 21例中旋前外旋型Ⅳ度19例,Ⅲ度2例,其中18例存在下胫腓联合分离,15例使用螺钉稳定下胫腓联合。合并后侧及外侧脱位者14例,外侧脱位者1例,后侧半脱位者1例,无脱位者5例,脱位率76.2%。7例后踝骨折胫骨远端关节面塌陷,可见游离骨碎片。末次随访(术后11~13个月,平均12.4个月)时,Baird-Jackson评分为81~100分,平均94.1分;其中优10例,良6例,中5例,优良率76.2%。结论旋前外旋型Ⅲ~Ⅳ度踝关节骨折多合并胫距关节脱位及下胫腓联合分离,需要复位固定下胫腓联合,正确的解剖复位及内固定,可获得满意的临床疗效。     

经皮动力髋螺钉治疗股骨转子间骨折

目的总结应用动力髋螺钉（DHS）经皮固定股骨转子间骨折的初步经验。方法自2003年5月应用DHS经皮固定股骨转子间骨折15例。其中男10例，女5例；年龄65～80岁，平均71岁，，先将插入克氏针的瞄准器放在髋关节的前方，在C形臂监测下，使克氏针位于股骨头的中央，且瞄准器的股骨部分紧贴股骨的外缘。另将1枚导针经皮沿克氏针指示的方向打入股骨头．在导针下做一小切口，切口长2.8～3，5cm，拧入拉力螺钉。拔出导针将动力髋接骨板沿肌层插入，将导针穿过接骨板的套轴重新插入拉力螺钉内，并按常规方法将套轴套在螺钉的尾部。手术时间45～80min，平均55min，术中出血100～200ml，无一例需术中输血。结果2例伤口表浅感染，2例发生下肢深静脉血栓，但无肺栓塞发生。骨折术后3～4个月全部愈合，随访时间9～13个月，3例髋关节伸屈轻度受限，余皆正常。结论经皮DHS治疗股骨转子间骨折手术时间短，出血少，术后康复快，是一个很有前途的治疗方法。     

有限切开、撬拨复位、QWIX空心钉内固定治疗后踝骨折

目的 探讨有限切开、撬拨复位、QWIX空心钉内固定治疗后踝骨折的临床疗效.方法 14例后踝骨折患者,男3例,女11例;年龄23～69岁,平均43.6岁.其中交通伤5例,坠落伤4例,行走扭伤3例,滑旱冰扭伤2例.按Weber和Danis踝关节骨折分型方法:A3型2例,B3型7例,C3型5例,进行有限切开撬拨复位QWIX空心钉内固定,并按术后制定的详细的早期功能锻炼和负重时间表,指导患者进行严格规则的功能锻炼,同时定期随访,对踝关节功能恢复情况进行评定.结果 所有患者均获随访,时间6～18个月,平均9.5个月.1例发生腓肠神经损伤,半年恢复正常.12例3个月后步态正常,踝关节活动度接近正常;6个月终末随访时,12例踝关节功能背屈均>20°,跖屈均>40°,与对侧正常踝关节功能大致相同;术后9个月,14例均达到了正常运动功能.临床疗效按Baird-Jackson评分标准:优12例,良1例,可1例,优良率93%.结论 有限切开撬拨复位空心钉治疗后踝骨折是一种行之有效的方法.     

股骨近端锁定钢板与动力髋螺钉治疗转子间骨折的分析

目的 比较股骨近端锁定钢板与动力髋螺钉(DHS)治疗股骨转子间骨折的临床效果.方法 收集2007年6月～2010年12月来我院就诊的股骨转予间骨折的患者87例,随机分成两组,分别采用股骨近端锁定钢板(47例)和DHS(40例)治疗,比较两组患者的手术时间、术中出血、骨折愈合时间、髋关节功能Harris评分及术后并发症.结果 87例患者均获得随访,平均随访时间为11.6个月.两组患者在手术时间上无明显差异(P＞0.05),但近端锁定钢板组术中出血多于DHS组(P＜0.01);两组患者骨折愈合时间及Harris评分无统计学差异(P＞0.05);近端锁定钢板组出现2例锁定螺钉进入髋关节的并发症,DHS组出现1例髋内翻、1例头钉拔出.结论 股骨近端锁定钢板治疗转子间骨折临床效果与DHS相似,是一种较为理想的手术方式.     

屈膝过程中的胫股运动特性分析

本文采用三维位移测量方法，测试１０例离体人膝标本的胫股关节三维运动特性。发现屈膝过程中，胫股运动也具有典型的三维运动特点。其中在屈膝初期的３０°内，胫骨内旋最明显并伴有胫骨内翻现象，平均内旋８°，内翻６－７ｍｍ，膝关节完全伸直时胫股扣锁使膝关节稳定，屈曲时胫股“解锁”使膝关节松弛，具重要的临床意义，同时提示，在解释传统的胫股扣锁现象时不应遗漏伴随发生的胫骨内／外翻现象。     

经皮加压螺钉内固定术治疗腕舟骨腰部骨折的效果

 目的 探讨掌侧入路经皮加压螺钉内固定治疗军事训练致急性腕舟骨腰部骨折的效果。方法 回顾性分析2017-09至2020-06武警贵州总队医院收治的15例急性腕舟骨腰部骨折患者,采用微创经皮掌侧入路螺钉内固定治疗,予注射器针头定位成功后置入导针,沿导针完成螺钉置入。术后石膏制动2周,分阶段功能锻炼。15例术后随访平均(18.13±8.68)个月,采用修订版Mayo腕关节功能评分系统评估疗效,疼痛视觉模拟评分评定患者疼痛情况,末次随访记录双腕关节屈伸、尺桡偏的关节活动度及握力。结果 15例手术均顺利完成,术中出血(2.50±1.02) ml;手术时间(44.73±5.67) min;术中、术后均无并发症发生。术后骨折顺利愈合,平均愈合时间(10.33±2.29) 周,Mayo腕关节功能评分优14例,良1例。疼痛视觉模拟评分0分12例,4分1例,1分2例。末次随访记录双腕屈伸、尺桡偏的关节活动度及握力进行对比,差异无统计学意义。结论 经皮加压螺钉内固定术治疗急性腕舟骨腰部骨折,方法简单、有效,手术时间短,避免了长时间石膏制动产生的关节僵硬。     

Arthroscopic biceps tenodesis with interference screw fixation: The lateral decubitus position

The tendon of the long head of biceps brachii is an important stabilizer within the glenohumeral joint. Bicepstendon pathology commonly occurs in the presence of concomitant shoulder disorders, such as subacromial impingement, and rotator cuff tears. Biceps tenodesis is indicated in the case of a partial tear (50%), an unstable biceps tendon due to an incompetent medial sling, and in the presence of a torn subscapularis. This article will describe our technique of arthroscopic biceps tenodesis with biodegradable interference screw fixation. This technique uses a uniquely designed Bio-Tenodesis screw system (Arthrex Inc., Naples, FL) and is performed with the patient in the lateral decubitus position.     

椎弓根螺钉对腰椎关节突关节破坏率的研究

目的回顾性分析腰椎经椎弓根螺钉固定后对邻近的关节突关节破坏的发生率，从而提出选择较佳置钉的方法和减少钉杆结合部体积的设想。方法对1995—2003年行腰椎经椎弓根螺钉固定手术的143例患者，利用X线、CT扫描等影像学检查，评价经椎弓根螺钉对上关节突破坏的发生率。结果26．0％(157／604)的螺钉和31．5％(46／143)的患者存在固定节段椎体的上关节突不同程度的破坏。上关节突破坏的发生率主要与患者的关节突关节角有关。结论术前可借助CT等影像学检查，确定腰椎上关节突的关节角指导术中进钉，同时设计器械时尽量减少钉杆结合部的体积，可减少椎弓根螺钉对腰椎关节突关节的破坏，有助于提高患者的远期疗效。     

闭合复位经皮空心螺钉内固定与切开复位内固定治疗踝关节骨折的疗效比较

目的 探讨闭合复位经皮空心螺钉内固定(MINI)与传统切开复位内固定(ORIF)治疗踝关节骨折的疗效.方法 对2004年3月～2009年8月收治的98例非粉碎性内外踝双骨折临床资料进行回顾性分析,根据内固定方法不同分为MINI组和ORIF组,MINI组53例,男性42例,女性11例;年龄23～59岁,平均37.5岁;骨...