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1.
目的:探讨关节镜辅助下使用双侧自体腘绳肌腱一期修复膝关节前后交叉韧带损伤的方法和临床疗效。方法:内窥镜微创双侧自体腘绳肌腱修复膝关节内韧带,术后用IKDC分级、影像学IKDC分级、Lysholm功能评分和KT2000TM测量进行关节机能打分。结果:11例患者获得3—5年随访,平均随访3.8年。术前Lysholm功能评分平均(46.8±5.7)分,终末随访时平均(81.3±10.5)分,差异有显著性(P〈0.05)。术后关节稳定性测量,在20磅时、30磅和最大拉力时健膝和患膝分别是:6.1±0.3和6.8±0.8;6.3±0.5和7.7±1。3;7.5±0.6和9.6±2.4,统计学上差异无显著性(P〉0.05)。主观IKDC分级:A级4例,B级6例,C级1例;影像学IKDC分级:A级8例,B级2例,C级1例。结论:关节镜辅助下使用双侧自体腘绳肌腱一期修复膝关节前后交叉韧带损伤是重建膝关节稳定性的良好有效方法。  相似文献   

2.
目的:探讨关节镜辅助下使用双侧自体腘绳肌腱一期修复膝关节前后交叉韧带损伤的方法和临床疗效。方法:内窥镜微创双侧自体腘绳肌腱修复膝关节内韧带,术后用IKDC分级、影像学IKDC分级、Lysholm功能评分和KT2000TM测量进行关节机能打分。结果:11例患者获得3-5年随访,平均随访3.8年。术前Lysholm功能评分平均(46.8±5.7)分,终末随访时平均(81.3±10.5)分,差异有显著性(P<0.05)。术后关节稳定性测量,在20磅时、30磅和最大拉力时健膝和患膝分别是:6.1±0.3和6.8±0.8;6.3±0.5和7.7±1.3;7.5±0.6和9.6±2.4,统计学上差异无显著性(P>0.05)。主观IKDC分级:A级4例,B级6例,C级1例;影像学IKDC分级:A级8例,B级2例,C级1例。结论:关节镜辅助下使用双侧自体腘绳肌腱一期修复膝关节前后交叉韧带损伤是重建膝关节稳定性的良好有效方法。  相似文献   

3.
目的:评估关节镜下膝关节前交叉韧带(ACL)与后交叉韧带(PCL)同时重建的技术和临床效果。方法:自2003年6月~2009年10月,27例病人(28膝)经MRJ检查及关节镜检查证实ACL和PCL均断裂,其中9膝伴内侧副韧带损伤(MCL),8膝伴后外侧角损伤(PLC),5膝伴内侧半月板破裂,4膝伴外侧半月板损伤。27例患者于伤后3~10周在关节镜下行膝关节前、后交叉韧带联合重建。结果:本组术后早期均未发生严重并发症。术后随访12-88个月,平均(42.67±3.34)个月,Lysholm膝关节功能评分为78-93分,平均(86.67±5.21)分。国际膝关节文件编制委员会(mDC)综合评定由术前显著异常(D级)28膝,改进为随访时正常(A级)9膝、接近正常(B级)16膝、异常(C级)3膝。结论:关节镜下膝关节前交叉韧带(ACL)与后交叉韧带(PCL)同时重建创伤小、手术操作精细,术后膝关节功能恢复满意。  相似文献   

4.
目的:评估关节镜下膝关节前交叉韧带(ACL)与后交叉韧带(PCL)同时重建的技术和临床效果。方法:自2003年6月~2009年10月,27例病人(28膝)经MRI检查及关节镜检查证实ACL和PCL均断裂,其中9膝伴内侧副韧带损伤(MCL),8膝伴后外侧角损伤(PLC),5膝伴内侧半月板破裂,4膝伴外侧半月板损伤。27例患者于伤后3~10周在关节镜下行膝关节前、后交叉韧带联合重建。结果:本组术后早期均未发生严重并发症。术后随访12~88个月,平均(42.67±3.34)个月,Lysholm膝关节功能评分为78~93分,平均(86.67±5.21)分。国际膝关节文件编制委员会(IKDC)综合评定由术前显著异常(D级)28膝,改进为随访时正常(A级)9膝、接近正常(B级)16膝、异常(C级)3膝。结论:关节镜下膝关节前交叉韧带(ACL)与后交叉韧带(PCL)同时重建创伤小、手术操作精细,术后膝关节功能恢复满意。  相似文献   

5.
目的:探讨股四头肌腱的生物力学特性,为其能否应用于临床前交叉韧带(ACL)重建提供实验依据.方法:取32例新鲜尸体的1cm宽股四头肌腱,按其解剖结构分为两柬:股直肌、股内、外侧肌腱舍为A束,股中问肌腱为B束,用游标卡尺测量两束的宽度及厚度,然后将两束置于电子万能试验机上分别测其生物力学指标.结果:A 束厚度为4.39±1.72mm,宽度为8.19±1.18mm,生物力学强度为685.67±227.09N,抗拉强度为17.00±3.48Mpa;B束厚度为3.06±1.47mm,宽度为7.10±2.03mm,生物力学强度为435.04±205.80N,抗拉强度为13.16±4.02Mpa.A束生物力学强度与ACL比较,差异有统计学意义(p<0.05);B束生物力学强度与ACL比较,差异有统计学意义(p<0.05).结论:股四头肌腱的生物力学性能不能满足ACL双束重建的要求,其在临床上应用于ACL双束重建的价值有待于进一步的深入研究.
Abstract:
Objective: To investigate the biomechanics of the quadrieeps tendon and to provide theoretical basis for double-bundle reeonstruction of anterior cruciate iigament(ACL). Methods: 32 quadriceps tendons (width lena) taken from fresh cadaver were dissected into 2 bundles according to the anatomy, one bundle including rectus femoris, vastus medialis and vastus lateralis was named A bundle and the other was named B bundle. The width and thickness of the A and B bundle were detected respectively with a Vernier caliper and the biomechanics were determined by WDW-30 election universal testing machine. Results: The thickness, width, ultimate load and ultimate tensile strength of bundle A were 4.39± 1.72mm, 8.19± 1.18mm, 685.67± 227.09 N and 17.00± 3.48 Mpa respectively, while for bundle B,which were 3.06± 1.47 ram, 7.10± 2.03mm: 435.04±205.80 N and 13.16± 4.02 Mpa. There was difference between bundle A and the ACL (p<0.05). Conclusion: The ultimate load ofbundle A was much lower than the the ACL and bundle Bwas also lower than the ACL.  相似文献   

6.
目的:探讨股四头肌腱的生物力学特性,为其能否应用于临床前交叉韧带(ACL)重建提供实验依据。方法:取32例新鲜尸体的1cm宽股四头肌腱,按其解剖结构分为两束:股直肌、股内、外侧肌腱合为A束,股中间肌腱为B束,用游标卡尺测量两束的宽度及厚度,然后将两束置于电子万能试验机上分别测其生物力学指标。结果:A束厚度为4.39±1.72mm,宽度为8.19±1.18mm,生物力学强度为685.67±227.09N,抗拉强度为17.00±3.48Mpa;B束厚度为3.06±1.47mm,宽度为7.10±2.03mm,生物力学强度为435.04±205.80N,抗拉强度为13.16±4.02Mpa。A束生物力学强度与ACL比较,差异有统计学意义(p〈0.05);B束生物力学强度与ACL比较,差异有统计学意义(p〈0.05)。结论:股四头肌腱的生物力学性能不能满足ACL双束重建的要求,其在临床上应用于ACL双束重建的价值有待于进一步的深入研究。  相似文献   

7.
生物医学工程的精要、责任和展望   总被引:1,自引:0,他引:1  
作为工程学的直属分支,建立生物医学工程学科的主要目的不是为了开辟一个新的科学研究领域,而是为了借助工程学的方法来解决生物医学领域所面临的实际问题,以及借助工程师们所接受的专业训练、所拥有的专业知识、所具备的工作技巧来提高医疗服务的质量和效果。工程学与生物医学的结合已取得了一些具有里程碑性质的成果。在中低收入国家,例如中国,生物医学工程有责任保证合理使用专业技术,为低廉、可靠、有效的医疗服务提供支持。本文将根据可预见和不可预见的学科发展限制和困难,对学科发展的现实目标和责任进行严肃、冷静地讨论。  相似文献   

8.
目的:分析造成军人前交叉韧带损伤的危险因素,进而指导临床,为前交叉韧带损伤的预防提供理论依据.方法:回顾性分析本院2011年11月-2012年6月的58例前交叉韧带损伤的军人病例,分别以损伤动作及其机制、损伤时所穿鞋子及发生场地、BMI及雌激素水平、运动前有无准备活动为指标,研究生物力学危险因素、外在环境危险因素、内在危险因素、神经肌肉危险因素对前交叉韧带损伤的影响.结果:ACL损伤动作中军事训练23例,篮球22例所占比例最高(总计77.6%).在所有损伤动作中屈膝外翻38例,跳起落地10例,运动急停7例,暴力扭转3例.塑胶场地发生33例(占56.9%)为四大场地中损伤构成比最高的场地;运动时所穿鞋子类型为运动鞋12例(20.7%)、胶底鞋41例(70.6%)时损伤发生构成比明显高于其他类型的鞋子.BMI分组中超重者38例(65.5%)占据首位.雌激素分组中损伤一般发生于排卵期前后.神经肌肉因素调查中56例(96.5%)患者运动前未行专业的准备活动.结论:屈膝外翻位,活动中鞋子与地面摩擦力大,BMI指数高,体内雌激素含量增高,没有专业的运动前准备活动与前交叉韧带损伤的发生有关.诸多危险因素中唯有神经肌肉危险因素可调节控制.  相似文献   

9.
目的:探讨关节镜下应用带跟骨异体跟腱联合重建前交叉韧带(anterior cruciate ligament,ACL)及内侧副韧带(medial col-ateml ligament,MCL)和恢复膝关节前内侧稳定性的效果.方法:选择2007年1月至2010年1月收治符合纳入标准的27例A CL合并MCL损伤患者.其中男18例,女9例;年龄16~48岁,平均32.5岁;右膝15例,左膝12例.患者在排除手术禁忌后,均在关节镜下采用带跟骨异体跟腱一期联合重建ACL和MCL.患者受伤至手术时间7~14天,平均10天.结果:术后2周所有患者切口均Ⅰ期愈合.所有病例获得长期随访,随访时间24~32个月,平均26个月.术后24个月,Lysholm评分由术前的32.10±4.35升至86.25±4.12分,国际膝关节文献委员会(IKDC)评分由术前的33.27±4.25分,升至82.46± 4.13分,术前与术后Lysholm评分及I KDC评分均有显著差别(P<0.05).结论:关节镜下应用带跟骨异体跟腱一期联合重建治疗膝关节脱位能够较好的恢复患者膝关节前内侧稳定行,近期效果良好.  相似文献   

10.
目的:探讨前交叉韧带(anterior cruciate ligament,ACL)在膝关节不同屈曲角度时的方位角变化,为ACL损伤诊断和重建研究提供解剖学支持。方法:成人膝关节标本10具,解剖观察ACL形态,用Photoshop软件测量膝关节不同屈曲角度下ACL方位角变化。结果:0°、30°位膝关节中ACL胫骨角大于ACL股骨角,有显著性差异(P0.01);60°、90°位膝关节中的ACL胫骨角小于股骨角,有显著性差异(P0.01)。膝关节0°、30°、60°、90°ACL胫骨角由大渐小,各角度间均有显著性差异(均P0.01)。膝关节0°和30°的ACL股骨角比60°和90°时小,有显著性差异(均P0.01),0°与30°间无显著性差异(P0.05),60°小于90°,有显著性差异(P0.01)。结论:ACL于膝关节0°和30°位时,后外侧束(posterolateral bundle,PLB)发挥主要作用,ACL诊断或重建主要参考胫骨角;60°、90°时ACL前内侧束(anteromedial bundle,AMB)发挥主要作用,ACL诊断或重建主要参考股骨角。ACL方位角可作为ACL损伤诊断和手术重建的重要参考。  相似文献   

11.
孙芳菲  张春礼  李小建  韩先伟  李光政 《生物磁学》2013,(24):4638-4642,4662
摘要目的:采用生长因子TGF-β1和bFGF诱导体外培养的兔骨髓间质干细胞(MSCs),转化为韧带样细胞,并研究此种韧带样细胞的生物特性。方法:自幼兔四肢骨抽取骨髓分离纯化MSCs并培养、增殖;采用特定浓度TGF-β1(10ng/ml)和bFGF(25ng/mL)对MSCs进行诱导分化,观察生长因子对MSCs生长、形态的影响,使用MTT法绘制细胞生长曲线,使用天狼腥红染色法定量对比MSCs分泌胶原蛋白量。单纯培养和单一因子诱导组作为对照。结果:TGF-β1和bFGF联合使用组,细胞形态优于空白组及单一因子组,细胞增殖率、胶原分泌量也均高于对照组。结论:联合使用生长因子TGF-β1和bFGF刺激兔MSCs,能够促使兔MSCs定向转化为韧带样细胞,对组织工程前交叉韧带的构建具有积极意义。  相似文献   

12.
    
《Cytotherapy》2014,16(5):586-598
Background aimsThe graft-healing potential of mesenchymal stromal cells (MSCs) derived from the remnants of ruptured anterior cruciate ligaments (ACLs) after ACL reconstruction may depend on the chronicity of the injury. The aim of this study was to assess the quantitative and phenotypic differences between MSCs isolated from ACL remnants in patients with (sub)acute and chronic tearing.MethodsTorn ACL remnants were harvested during ACL reconstruction from 41 patients, 24 with (sub)acute ACL (<6 months from injury to surgery) and 17 with chronic ACL (time interval >6 months) tears. MSCs isolated from these samples were assessed for quantitative and phenotypic differences, and the correlation between the proportion of MSCs and the chronicity of ACL tear was evaluated.ResultsAt passage 0, the mean proportion of MSCs (CD34, CD44+, CD90+ and CD105+) was higher in (sub)acute than in chronic ACL tear samples (20.69% ± 7.82% versus 9.85% ± 8.01%, P < 0.001). At passages 1 and 2, however, MSC proportions did not differ significantly in the two groups. Time interval showed a negative correlation with MSC proportion only at passage 0 (r = −0.505, P < 0.001). The optimal cutoff value for time from injury to surgery yielding <10% freshly isolated ACL-MSCs, a percentage expected to have low tissue healing potential, was 23.5 months.ConclusionsThe proportion of freshly isolated MSCs was higher in samples from patients with (sub)acute tearing than in chronic ACL tearing and negatively correlated with the time interval between trauma and surgery.  相似文献   

13.
    
The human knee joint has a three-dimensional geometry with multiple body articulations that produce complex mechanical responses under loads that occur in everyday life and sports activities. Understanding the complex mechanical interactions of these load-bearing structures is of use when the treatment of relevant diseases is evaluated and assisting devices are designed. The anterior cruciate ligament (ACL) in the knee is one of four main ligaments that connects the femur to the tibia and is often torn during sudden twisting motions, resulting in knee instability. The objective of this work is to study the mechanical behavior of the human knee joint and evaluate the differences in its response for three different states, i.e., intact, ACL-deficient, and surgically treated (reconstructed) knee. The finite element models corresponding to these states were developed. For the reconstructed model, a novel repair device was developed and patented by the author in previous work. Static load cases were applied, as have already been presented in a previous work, in order to compare the calculated results produced by the two models the ACL-deficient and the surgically reconstructed knee joint, under the exact same loading conditions. Displacements were calculated in different directions for the load cases studied and were found to be very close to those from previous modeling work and were in good agreement with experimental data presented in literature. The developed finite element model for both the intact and the ACL-deficient human knee joint is a reliable tool to study the kinematics of the human knee, as results of this study show. In addition, the reconstructed human knee joint model had kinematic behavior similar to the intact knee joint, showing that such reconstruction devices can restore human knee stability to an adequate extent.  相似文献   

14.
This study determined which knee joint motions lead to anterior cruciate ligament (ACL) rupture with the knee at 25° of flexion. The knee was subjected to internal and external rotations, as well as varus and valgus motions. A failure locus representing the relationship between these motions and ACL rupture was established using finite element simulations. This study also considered possible concomitant injuries to the tibial articular cartilage prior to ACL injury. The posterolateral bundle of the ACL demonstrated higher rupture susceptibility than the anteromedial bundle. The average varus angular displacement required for ACL failure was 46.6% lower compared to the average valgus angular displacement. Femoral external rotation decreased the frontal plane angle required for ACL failure by 27.5% compared to internal rotation. Tibial articular cartilage damage initiated prior to ACL failure in all valgus simulations. The results from this investigation agreed well with other experimental and analytical investigations. This study provides a greater understanding of the various knee joint motion combinations leading to ACL injury and articular cartilage damage.  相似文献   

15.
    
The purpose of this study was to examine the moment-arm and cross-sectional area (CSA) of the patellar tendon (PT) and the hamstrings after anterior cruciate ligament (ACL) reconstruction. The right knee of five males who underwent ACL reconstruction with a PT graft and five age-matched controls was scanned using magnetic resonance image scans. Based on three-dimensional (3D) solids of the PT, CSAs and moment-arms of semitendinous (ST), biceps femoris (BF) long head and semimembranosus (SM) were estimated. Analysis of variance indicated no significant group differences in muscle moment-arms (p>0.05). 3D moment-arms of PT, ST and BF were significantly lower than the corresponding 2D values (p < 0.05). The ACL group displayed a significantly higher maximum BF CSA, a lower ST CSA (p < 0.05) but similar PT and SM CSAs compared with controls. It is concluded that any alterations in PT properties 1 year after harvesting do not affect knee muscle moment-arms compared with age-matched controls. Moment-arm estimation differed between 3D and 2D data, although it did not affect comparisons between ACL reconstruction group and controls. Design of rehabilitation programmes should take into consideration a potential alteration in hamstring morphology following surgery with a PT graft.  相似文献   

16.
为了探讨凋亡酶的半胱天冬酶3 (Caspase 3)、促炎细胞因子interleukin-1β (IL-1β)、白细胞介素-6(IL-6)和基质金属蛋白酶降解酶-13 (MMP-13)的表达水平,来说明前交叉韧带(anterior cruciate ligament,ACL)损伤后软骨细胞的软骨变性和骨性关节炎的发展情...  相似文献   

17.
The purpose of this study was to describe kinematic and kinetic differences between a group of ACL deficient subjects who were grouped according to functional ability. Sixteen patients with complete ACL rupture were studied; eight subjects had instability with activities of daily living (non-copers) and eight subjects had returned to all pre-injury activity without limitation (copers). Three-dimensional joint kinematics and kinetics were collected from the knee and ankle during walking, jogging and going up and over a step. Results showed that both groups mitigated the force with which they contacted the floor but non-copers consistently demonstrated less knee flexion in the involved limb. The copers used joint kinematics similar to those of their uninvolved knees and similar to knee motions reported in uninjured subjects. The reduced knee motion in the involved knee of the non-copers did not correlate directly with quadriceps femoris muscle weakness.

The data suggest that the non-copers utilize a stabilization strategy which stiffens the knee joint which not only is unsuccessful but may lead to excessive joint contact forces which have the potential to damage articular structures. The copers use a strategy which permits normal knee kinematics and bodes well for joint integrity.  相似文献   


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