早期内侧髌股韧带重建治疗急性创伤性髌骨脱位疗效分析

目的评估早期内侧髌股韧带(medial patellofemoral ligament,MPFL)重建治疗急性创伤性髌骨脱位的临床疗效。方法急性髌骨创伤性脱位病人15例,伤后早期行MPFL重建手术治疗。术后定期随访,评估髌骨稳定性,并比较病人伤前及术后末次随访的膝关节Lysholm评分、Kujala评分和Tegner评分。结果所有病人术后随访平均18.6个月。末次随访时,均未出现髌骨再次脱位,体检髌骨外推试验及恐惧试验均为阴性。伤前膝关节Lysholm评分、Kujala评分和Tegner评分分别为(90.6±13.1)分、(92.3±12.4)分和(5.9±1.3)分;术后末次随访评分分别为(91.2±12.5)分、(95.1±13.2)分和(6.2±1.6)分,与伤前比较差异无统计学意义(P0.05)。结论急性创伤性髌骨脱位早期行MPFL重建手术,能够良好恢复髌骨稳定性和膝关节功能。     

外侧松解+胫骨结节内移+MPFL重建术治疗复发性髌骨脱位3例分析

[目的]探讨外侧松解+胫骨结节内移+MPFL重建术治疗复发性髌骨脱位的临床效果。[方法]选择2012年1月~2013年6月本院收治的3例复发性髌骨脱位患者,给予外侧松解+胫骨结节内移+MPFL重建术治疗。术后随访,观察髌骨倾斜角、TT-TG值、Kujala评分、Lysholm评分变化。[结果]随访3年,髌骨无脱位且膝关节屈伸活动较好。末次随访髌骨倾斜角、TT-TG值、Kujala评分、Lysholm评分分别为(10.74±3.25)°、(11.78±4.64)mm、(91.62±3.45)分、(90.73±4.14)分,均显著性优于术前的(33.41±6.12)°、(20.62±3.13)mm、(52.69±5.21)分、(56.46±4.72)分,差异有统计学意义(P<0.05)。[结论]外侧松解+胫骨结节内移+MPFL重建术可有效治疗复发性髌骨脱位,效果满意。     

关节镜下内侧髌股韧带重建联合胫骨结节移位术治疗复发性髌骨脱位五年随访

目的探讨关节镜下内侧髌股韧带(medial patellofemoral ligament,MPFL)重建联合胫骨结节移位术治疗复发性髌骨脱位的疗效。方法 2012年2月—2013年12月,关节镜下行自体半腱肌双束等长重建MPFL联合胫骨结节移位术治疗24例(24膝)复发性髌骨脱位患者。男7例,女17例;年龄18～37岁,平均23.2岁。1例曾于外院手术后脱位复发,其余均为首次手术。病程6个月～20年,平均5.6年。恐惧试验及髌骨外推试验均为阳性。术前Lysholm评分为(49.79±11.67)分,Kujala评分为(49.63±6.28)分。X线片示13例髌骨及股骨滑车存在发育不良;8例存在高位髌骨(Caton-Deschamps指数1.2);髌股适合角为(23.96±5.54)°。CT检测示胫骨结节-股骨滑车沟间距(tibial tuberosity-trochlear groove distance,TT-TG)值为(23.71±2.35)mm。结果术后切口均Ⅰ期愈合。22例获随访,随访时间59～81个月,平均66.8个月。随访期间均未出现再脱位;恐惧试验及髌骨外推试验均为阴性。术后1周X线片及CT复查,髌股适合角为(–1.96±4.65)°,TT-TG值为(13.75±1.89)mm,均较术前明显减小(P0.05)。术后6个月、1年及末次随访时,Lysholm评分分别为(81.13±17.76)、(91.35±3.60)、(92.23±2.71)分,Kujala评分分别为(84.04±3.98)、(91.48±3.64)、(91.45±3.29)分;术后各时间点评分均较术前明显增加(P0.05)。末次随访时按照Insall评价标准评定疗效,获优11例、良8例、可3例,优良率为86%。结论关节镜下自体半腱肌重建MPFL联合胫骨结节移位术治疗复发性髌骨脱位,可以有效改善髌股关节匹配关系,早中期疗效满意。     

关节镜辅助下三联手术治疗复发性髌骨脱位

目的探讨关节镜辅助下三联手术治疗复发性髌骨脱位的近期疗效。方法对23例复发性髌骨脱位患者在关节镜辅助下行外侧支持带松解、内侧髌股韧带重建及改良Fulkerson截骨术。术后随访,评估影像学检查结果、Tegner下肢运动能力主观评分、Lysholm膝关节功能综合评分和Kujala髌股关节评分。结果 23例均获随访,时间12~36(24.3±7.82)个月。患者无髌骨再脱位或半脱位,Q角在正常范围。患膝CT显示,髌骨/股骨滑车适配角从术前13.30°±5.15°改善至末次随访时5.72°±3.32°(P0.01),髌股关节外侧张开角从术前0.70°±2.85°改善至末次随访时8.13°±2.75°(P0.01)。Lysholm评分从术前47.92分±16.23分提高至末次随访时93.27分±7.91分(P0.01);Tegner评分从术前5.32分±1.10分提高至末次随访时6.37分±0.83分(P0.01);Kujala髌股关节评分从术前55.3分±11.23分提高至末次随访时83.2分±13.91分(P0.01)。结论关节镜辅助下三联手术治疗复发性髌骨脱位能有效防止复发和恢复髌股关节功能,疗效满意。     

弧形骨槽联合骨筋膜覆盖技术双束解剖重建内侧髌股韧带

[目的]探讨弧形骨槽联合髌内侧骨筋膜覆盖技术双束解剖重建内侧髌股韧带(medial patella femoral ligament,MPFL)治疗复发性髌骨脱位的中短期临床效果。[方法]回顾本院2012年2月~2015年10月诊断为复发性髌骨脱位的患者25例,其中男11例,女14例,年龄13~35岁,平均20.7岁,手术以收肌结节与股骨内上髁最高点连线的中点作为MPFL股骨止点并建立7 mm骨道,髌骨内缘1/3做髌骨侧止点,使用磨钻于该止点建立约2 cm的弧形骨槽以充分包埋移植物并用骨筋膜充分覆盖和固定移植物。将移植物两游离缘由髌骨侧从股内侧肌斜束与关节囊之间自股骨侧切口穿出并于骨道内口用可吸收界面螺钉固定。临床评价包括手术前后的Kujala、Lysholm和Tegner评分,影像学分析包括手术前后的髌股适合角(congruance angle,CA),髌骨倾斜角(patellar tilt angle,PTA),髌骨外移率(patellar lateral shift ratio,PLSR)。[结果]术后随访时间均在12个月以上,平均(18.84±4.95)个月,未见复发、感染等相关并发症。所有患者术后Kujala、Lysholm和Tegner临床评分较术前均有显著性改善(P<0.05)。所有患者影像学指标均恢复至正常范围,术前术后改变差异具有统计学意义(P<0.05)。[结论]弧形骨槽联合髌内侧骨筋膜覆盖技术双束解剖重建MPFL具有切口小、复发率低等优点,中短期临床疗效满意。     

双束重建内侧髌股韧带治疗复发性髌骨外脱位的疗效

目的探讨双束重建内侧髌股韧带(MPFL)治疗复发性髌骨外脱位的疗效。方法对18例复发性髌骨外脱位患者行双束重建MPFL术治疗。术后12个月根据膝关节Lysholm评分、髌股关节Kujala评分评价疗效。结果患者均获得随访,时间14～56个月。随访期间无感染、下肢深静脉血栓形成等并发症出现,无再次脱位或半脱位,恐惧试验阴性。1例出现术后膝关节屈曲受限,经加强锻炼后恢复正常。术后12个月患者膝关节屈曲活动度基本正常,可适当进行体育活动,临床治疗效果满意。术后12个月Lysholm评分、Kujala评分均明显高于术前,差异有统计学意义(P0.05)。结论双束重建MPFL治疗复发性髌骨脱位疗效确切,可明显提高髌股关节的稳定性。     

外侧支持带松解、内侧髌股韧带重建联合胫骨结节截骨术治疗严重复发性髌骨脱位

目的探讨外侧支持带松解(lateral retinaculum release,LRR)、内侧髌股韧带(medial patellafemoral ligament,MPFL)重建联合胫骨结节截骨术治疗严重复发性髌骨脱位的疗效。方法回顾了2015年6月至2018年3月收治的19例复发性髌骨脱位患者资料,其中男7例,女12例;年龄15～30岁,平均(22.7±1.5)岁;均采用外侧支持带松解、MPFL重建联合胫骨结节截骨术治疗。记录股四头肌角(quadricep angle,Q角)、胫骨结节-股骨滑车间距(tibial tubercle-trochlear groove distance,TT-TG)和Lysholm膝关节功能评分,评估患者手术前后膝关节功能。结果 19例患者均获得随访,随访时间12～24个月,平均(15.6±1.3)个月。患者术后Q角、TT-TG值、Lysholm膝关节功能评分均优于术前,差异有统计学意义(P0.01)。结论应用外侧支持带松解、MPFL重建联合胫骨结节截骨术治疗严重复发性髌骨脱位,疗效显著,是治疗复发性髌骨脱位的有效临床方法。     

关节镜辅助下半腱肌解剖重建内侧髌股韧带治疗复发性髌骨脱位

目的探讨关节镜辅助下半腱肌解剖重建内侧髌股韧带治疗复发性髌骨脱位及临床疗效。方法我科在2014年4月至2016年7月,通过关节镜辅助下半腱肌解剖重建内侧髌股韧带治疗复发性髌骨脱位17例,术后定期随访,末次随访评估手术前后外侧髌股角、膝关节Kujala、Lysholm评分。结果 17例患者,2例后期失访,平均随访时间19.4个月。复查J-sign(-)、髌骨恐惧试验(-)、髌骨外推移位试验(-),末次随访评估手术前后外侧髌股角、膝关节Kujala、Lysholm评分,行配对t检验,结果显示术后较术前差异有统计学意义(P0.05)。结论关节镜辅助下自体半腱肌肌腱解剖重建内侧髌股韧带治疗复发性髌骨脱位是一种疗效显著的手术方式。     

自体肌腱V型解剖重建内侧髌股韧带治疗髌骨脱位

目的探讨自体半腱肌肌腱移植V型解剖重建内侧髌股韧带（MPFL）治疗髌骨脱位的手术技术及临床疗效。方法回顾性分析2009年5月至2013年11月广州市中西医结合医院收治的12例（14膝）髌骨外脱位及半脱位患者的临床资料,患者均行自体半腱肌肌腱V型解剖重建MPFL手术。测量手术前后患者膝关节Q角和胫骨结节-股骨滑车间距（TT-TG）指数,依据Kujala和Lysholm膝关节评分标准评估患者术前和末次随访时的膝关节功能,记录随访期间并发症发生情况。结果平均手术时间50 min（55-65 min）,术中平均出血量25mL（15-35 mL）,手术切口平均长度4.5 cm（3-6 cm）。患者均获随访,随访时间4-48个月,平均随访时间20.5个月。术后均无髌骨再脱位,未出现髌骨不稳及髌骨骨折。术前和术后1周患者膝关节Q角、TT-TG指数分别为（18.8±2.8）。和（15.0±1.3）。、（20.5±2.1）mm和（17.6±1.9）mm,术前和末次随访Kujala评分、Lysholm评分分别为（65±5）分和（93±6）分、（68±5）分和（93±5）分。各指标手术前后比较,差异均有统计学意义（P〈0.05）。结论自体半腱肌肌腱V型移植重建MPFL治疗髌骨脱位可有效维持髌骨稳定,生物力学功能恢复良好,创伤小,并发症少,疗效满意。     

股内侧肌悬吊髌骨单锚钉双束解剖重建内侧髌股韧带

[目的]介绍股内侧肌悬吊髌骨单锚钉双束解剖重建内侧髌股韧带(MPFL)治疗复发性髌骨脱位的技术方法。[方法]2013年1月～2016年6月收治的复发性髌骨脱位患者19例。手术以股骨内上髁、收肌结节与腓肠肌结节之间的凹陷作为MPFL股骨止点,建立直径6 mm、深40 mm骨隧道;髌骨内缘中点做髌骨侧止点,沿髌骨长轴建立约1 cm的骨槽,在中点平行于髌骨关节面打入1枚带双线4.5 mm锚钉,将移植物固定于骨槽并与周围软组织缝合。移植物近侧游离端穿过股内侧肌斜束肌腱,形成"悬吊"结构并自股骨侧切口下穿出,远侧游离端在深筋膜隧道自近端移植物同一位置穿出,远近端缝合为一股端,于骨道内口用可吸收界面螺钉固定。[结果]术后随访12～48个月。未发生感染、膝关节功能障碍、复发等相关并发症。末次随访时膝关节功能Lysholm、IKDC、Kujala和Tegner评分均较术前显著增加,差异有统计学意义(P0.05);末次随访时CA、Q角、PTA、PLSR均较术前显著减小,差异有统计学意义(P0.05)。[结论]股内侧肌悬吊髌骨拴桩双束解剖重建内侧髌股韧带切口小、复发率低,可恢复髌股轨迹的动力和静力稳定性,临床疗效满意。     

Medial patellofemoral ligament reconstruction for recurrent patellar instability

The purpose of this study was to determine the value of reconstruction of the medial patellofemoral ligament (MPFL) in the treatment of recurrent patellar dislocation and subluxation. We retrospectively reviewed 40 randomised patients with recurrent patellar dislocation or subluxation, who had undergone realignment surgery from July 1999 to December 2001. Group E consisted of 20 patients who had undergone an Elmslie-Trillat procedure. In Group M, also consisting of 20 patients, the Elmslie-Trillat procedure was combined with reconstruction of the MPFL. Pre and postoperative data were collected and compared. At follow-up after 2 years, the apprehension sign remained positive in 6 knees of Group E, but in none of Group M. On a stress skyline radiograph, stability was significantly better in Group M than in Group E. Based on these findings, it appears that reconstruction of the MPFL is a useful addition to the treatment of recurrent patellar dislocation and subluxation.     

复发性髌骨脱位的治疗进展

复发性髌骨脱位主要表现为髌骨反复性脱位、"打软腿"等,大多有外伤史或膝关节发育不良的基础。传统治疗方法包括内侧支持带紧缩、外侧支持带松解、胫骨结节移位、股骨滑车成型术等。近年来随着对内侧髌股韧带(MPFL)解剖结构及生物力学的研究逐渐深入,MPFL防止髌骨脱位的作用越来越被重视,通过重建MPFL来恢复髌骨正常轨迹日益增多。目前尚无一种术式能够完全治疗复发性髌骨脱位,具体治疗根据患者的解剖及生物力学情况,选择合适的术式联合治疗,恢复患者的髌骨稳定性、下肢力线及尽可能恢复膝关节功能。     

关节镜下内侧髌股韧带重建和外侧支持带松解治疗复发性髌骨脱位

目的:评价内侧髌股韧带重建联合外侧支持带松解治疗复发性髌骨脱位的临床效果.方法:2011年3月至2013年6月在关节镜下进行内侧髌股韧带重建联合外侧支持带松解治疗复发性髌骨脱位15例,男5例,女10例;年龄14～32岁,平均19.4岁;髌骨脱位2次及以上.术前常规行X线、CT、MR检查了解髌股关节及内侧髌股韧带情况,关节功能Lysholm评分69.85±11.52,术中镜下查看髌股对合关系及髌骨运动轨迹.术中使用自体腘绳肌腱重建内侧髌股韧带同时关节镜下外侧支持带松解.结果:所有患者获随访,时间12～36个月,平均27.6个月,患者无再发髌骨脱位及半脱位,伸直位及屈曲30°位恐惧试验和髌骨外移试验均为阴性,术后12个月患者完全恢复正常活动,膝关节无主观不适,术后Lysholm评分92.60±5.75,较术前提高.结论:关节镜下内侧髌股韧带重建联合外侧支持带松解手术能有效治疗复发性髌骨脱位,缓解症状,重建髌骨稳定性.     

Surgical technique and rationale for medial patellofemoral ligament reconstruction for recurrent patellar dislocation

This article describes a medial patellofemoral ligament (MPFL) reconstruction procedure using an artificial ligament for recurrent patellar dislocation. The MPFL has been shown biomechanically to be the primary restraint among the medial patellar stabilizers. Although various predisposing factors are involved in lateral patellar dislocation, we believe that the MPFL, as a primary restraint, should undergo primary reconstruction for patellar dislocation. The results of MPFL reconstruction using a mesh-type artificial ligament and medial retinaculum slip coverage for recurrent patellar dislocation were as good as we had expected. In this article, we describe the detailed surgical technique and its rationale. We believe technique has also wide applications in MPFL reconstruction using autogenous tendons.Arthroscopy: The Journal of Arthroscopic and Related Surgery, Vol 19, No 5 (May-June), 2003: pp E47     

关节镜下双束重建内侧髌股韧带联合半髌韧带内移治疗骨骺未闭合青少年复发性髌骨脱位

目的探讨关节镜下自体半腓骨长肌腱双束重建内侧髌股韧带联合半髌韧带内移手术治疗骨骺未闭合青少年复发性髌骨脱位的临床疗效。方法回顾性分析自2016-07—2018-09诊治的20例骨骺未闭合且胫骨结节-股骨滑车沟间距>20 mm的青少年复发性髌骨脱位,在关节镜下采用自体半腓骨长肌腱经大收肌肌腱止点悬吊双束重建内侧髌股韧带联合半髌韧带内移手术治疗。结果 20例均获得随访,随访时间平均21.2(12~36)个月。所有患者术后复查均未再发生髌骨脱位或半脱位,膝关节功能恢复满意。末次随访时髌股适合角为(-1.79±3.26)°,髌骨倾斜角为(11.11±1.08)°,较术前明显减小;末次随访时膝关节功能Lysholm评分为(94.60±2.58)分,髌股关节功能Kujala评分为(91.05±2.33)分,较术前明显提高,差异有统计学意义(P<0.05)。结论对于骨骺未闭合且胫骨结节-股骨滑车沟间距>20 mm的青少年复发性髌骨脱位患者,关节镜下采用自体半腓骨长肌腱双束重建内侧髌股韧带联合半髌韧带内移手术治疗可获得稳定的髌骨滑动轨迹,髌骨脱位矫正良好。     

内侧髌股韧带重建术治疗复发性髌骨脱位的疗效研究

目的探讨游离肌腱移植重建内侧髌股韧带的手术方法及治疗复发性髌骨脱位的疗效。方法自2006年6月至2012年7月收治复发性髌骨脱位患者共40例（47膝）,男10例（12膝）,女30例（35膝）,年龄7～51岁,平均19．4岁。全部经膝关节镜检最后确诊,其中43膝采用游离自体半腱肌,4膝采用异体肌腱,通过髌骨双隧道移植重建内侧髌股韧带,镜下动态调整移植肌腱的张力,使髌股关节对合达到正常,并用挤压螺钉将肌腱游离端固定在股骨止点。其中8例（10膝）同时行髌韧带止点内移术。结果有36例（42膝）患者获得随访,随访时间3—70个月,平均随访23个月。临床疗效评价包括髌骨主观稳定性评估、Lysholm膝关节评分及Insall疗效标准（1976年）。术后髌骨外推试验和恐惧试验均为阴性。手术前后Lysholm评分术前平均为（63．1±9．1）分,术后评分为（87．1±6．4）分,手术前后的差异有统计学意义（t=21．7,P〈0．05）。按Insall疗效标准,优良率为85．7％。结论采用以游离肌腱重建MPFL为主的综合术式治疗复发性髌骨脱位,手术效果满意。     

重建内侧髌股韧带治疗复发性髌骨脱位

目的:探讨重建内侧髌股韧带治疗复发性髌骨脱位的中期效果。方法:2007年2月至2010年1月,复发性髌骨脱位65例,男6例,女59例;年龄17～24岁,平均20岁;右膝35例,左膝30例。全部取自体同侧半腱肌重建内侧髌股韧带。手术前后采用Lysholm及Tegner进行功能评分,影像学采用Congruence角及Sulcus角评分。结果:全部病例获随访,时间15～23个月,平均20个月,无膝关节髌骨半脱位或脱位。Lysholm膝关节功能评分从术前的(60.6±3.7)分升至(89.8±4.6)分(t=-15.58,P=0.00);IKDC评分从术前的平均(40.0±3.5)分升至(82.0±3.6)分(t=-27.44,P=0.00);Tegner评分从术前的平均(3.6±0.4)分升至(5.6±0.3)(t=-10.84,P=0.00);Congruence角由术前的平均(26.4±3.9)°降至(4.3±1.8)°(t=16.15,P=0.00);Sulcus角由术前的平均(148.8±2.0)°降至术后的(140.5±1.6)°(t=10.51,P=0.00)。结论:重建内侧髌股韧带治疗复发性髌骨脱位能提供足够的张力,维持髌骨稳定性。     

Does the Utilization of Allograft Tissue in Medial Patellofemoral Ligament Reconstruction in Pediatric and Adolescent Patients Restore Patellar Stability?

Background

Medial patellofemoral ligament (MPFL) reconstruction is one of several surgical procedures used to treat patellofemoral instability. Use of allograft tissue can preserve autogenous tissue and may be preferable in patients with connective tissue disorders or ligamentous laxity. Although there are successful reports in adults, it is unclear if the use of allograft tissue in MPFL reconstruction can restore patellofemoral stability in children and adolescents.

Questions/purposes

(1) Does allograft tissue in MPFL reconstruction in pediatric and adolescent patients restore patellar stability? (2) What complications were associated with allograft MPFL reconstructions in children and adolescents?

Methods

Between June 2012 and August 2015, one surgeon (NKP) performed 26 MPFL reconstructions in 23 patients with gracilis allograft for traumatic patellar instability. Of those, 25 (96%) were available for followup more than 1 year later (mean, 24 months; range, 12–44 months). During this time, the surgeon suggested reconstruction to patients who had recurrent dislocation or subluxation after 6 weeks of bracing, physical therapy, and activity modification if they were noted to have a torn or attenuated MPFL on MRI. During that period, this was the only surgical technique the surgeon used to treat traumatic patellar instability. Patients undergoing concurrent bony procedures were ineligible for inclusion. The mean age of the patients in the series was 16.0 (± 2) years. Age, sex, skeletal maturity, presence of trochlear dysplasia, and additional arthroscopic procedures at the time of reconstruction were collected. Postoperative notes and imaging were reviewed for presence of complications defined as recurrent dislocation, recurrent subluxations, fractures, infection, or arthrofibrosis. These complications were identified by chart review by the senior surgeon (NKP) and study personnel (EH) not involved in clinical care of the patients or by patient-reported complications. Recurrent subluxation or dislocation was patient-reported at the time of the clinic visit or followup phone/email contact. Fractures were defined as any cortical disruption in the femur or patella that required treatment (change in postoperative protocol), infection requiring treatment (antibiotics and/or return to the operating room), or arthrofibrosis (stiffness that necessitated a change in the postoperative protocol or manipulation under anesthesia).

Results

Ninety-two percent (23 of 25) of patients reported no further instability episodes after MPFL reconstruction. Sixteen percent (four of 25) of patients had complications: two repeat episodes of patellar instability, one patella fracture, and one symptomatic hardware requiring interference screw removal. No patients developed arthrofibrosis or infection.

Conclusions

In this small case series, we found that MPFL reconstruction using allograft tissue in children and adolescents resulted in a low risk of recurrent instability, perhaps comparable to what has been published by others who have used autograft tissue. Longer followup is needed, because in some orthopaedic applications, allograft ligaments have been observed to attenuate over time. Future studies might compare these techniques using patient-reported outcomes scores as well as use a control group of patients with autograft tissue.

Level of Evidence

Level IV, therapeutic study.

     

Dynamic medial patellofemoral ligament reconstruction in recurrent patellar instability: A surgical technique

The medial patellofemoral ligament (MPFL) is the primary stabilizer of the patellofemoral joint; its reconstruction has been recommended in adults over the past decade after recurrent patellar instability. However, there has been no standardized technique for reconstruction, therefore, ideal graft and technique for reconstruction are yet undetermined. However, dynamic MPFL reconstruction studies claim to be superior to other procedures as it is more anatomical. This preliminary study aims at assessing the outcomes of MPFL reconstruction in a dynamic pattern using hamstring graft. We performed this procedure in four consecutive patients with chronic patellar instability following trauma. MPFL reconstruction was done with hamstring tendons detached distally and secured to patellar periosteum after being passed through a bony tunnel in the patella without an implant and using the medial collateral ligament as a pulley. In all 4 knees, the MPFL reconstruction was isolated and was not associated with any other realignment procedures. No recurrent episodes of dislocation or subluxation were reported at 24 months followup.     

Total Knee Arthroplasty Combined With Medial Patellofemoral Ligament Reconstruction for Osteoarthritic Knee With Preoperative Valgus Deformity and Chronic Patellar Dislocation

We report a challenging case of a 44-year-old woman who had osteoarthritis in the lateral compartment of her right knee with severe valgus deformity and chronic lateral patellar dislocation. Total knee arthroplasty was performed for the knee. However, persistent patellar dislocation remained during the surgery; and therefore, medial patellofemoral ligament (MPFL) reconstruction was additionally performed at the time of the surgery. Stable patellar tracking was obtained after the MFPL reconstruction; and during the 2-year follow-up, her knee functioned well, and no recurrent patellar dislocation was observed. This clinical case indicates the usefulness of MPFL reconstruction for obtaining stable patellar tracking during total knee arthroplasty when a tendency for lateral patellar dislocation remains.