内侧髌股韧带重建联合胫骨结节移位和关节镜下外侧支持带松解术治疗持久性髌骨脱位

目的观察内侧髌股韧带重建联合胫骨结节移位和关节镜下外侧支持带松解术治疗持久性髌骨脱位的效果。方法对6例持久性髌骨脱位患者的10个膝关节行内侧髌股韧带重建联合胫骨结节移位和关节镜下髌骨外侧支持带松解术。手术前后采用Lysholm膝关节功能评价表和Kujala评分表进行评估,并通过CT观测手术前后髌骨外移度。结果 6例均获随访,时间24～36(29±7.21)个月。Lysholm评分术前为47.10分±10.31分,术后24个月为83.11分±5.21分,差异有统计学意义(P<0.05);Kujala评分术前为41.26分±13.36分,术后24个月为82.33分±5.31分,差异有统计学意义(P<0.05)。患膝运动能力均较术前明显改善。髌骨外移度术前为35.61 mm±5.37 mm,术后为4.30mm±1.13mm,差异有统计学意义(P<0.05)。结论内侧髌股韧带重建联合胫骨结节移位和关节镜下髌骨外侧支持带松解术能够有效纠正持久性髌骨外侧脱位,缓解症状,恢复膝关节功能。     

Patella alta and patella infera. Their etiological role in patellar dislocation, chondromalacia, and apophysitis of the tibial tubercle.

The Insall-Salvati method of assessing the position of the patella was applied to four groups of patients:normal patients, and those with dislocation of the patella, chondromalacia of the patella, and apophysitis of the tibial tubercle. The ratio of patellar length to tendon length was 1.0 in the normal patients, 0.8 in the patients with dislocations, 0.86 in those with chondromalacia, and 1.2 in those with apophysitis of the tibial tubercle. Patella alta may be an important cause of dislocating patella and of chondromalacia patellae. The significance of the patella infera found in the Osgood-Schlatter lesion may be one of either cause or effect.     

Tibial tubercle osteotomy in patello-femoral instability and in patellar height abnormality

The aim of this study was to present the different surgical procedures of tibial tubercle osteotomies for patellar instability or patellar mispositioning such as patella alta or patella infera. This study analysed the Caton–Deschamps index used for assessment of vertical patella height in order to make a precise plan for tibial tuberosity osteotomies. This study included 61 knees (50 patients) treated for patellar instability with patella alta and 24 patients treated for patella infera of mechanical origin. The results of medial transfer of the tibial tuberosity, with or without distal transfer in cases of patellar instability with patella alta, gives excellent results for stability in 76.8% of the cases. The results of the proximal transfer of the tibial tuberosity in cases of patella infera were excellent or good in 80% of the cases in our series of 24 patients. A precise preoperative plan is needed with determination of the vertical patellar height using the Caton–Deschamps index and the situation of the tibial tuberosity and the Tibial Tubercle to Trochlear Groove distance (TT-TG) of the knee on CT scan in order to obtain satisfactory results.     

Observations on patellar height following opening wedge proximal tibial osteotomy

Patellar height and patellar ligament length were assessed pre- and postoperatively in 28 patients who underwent a medial opening wedge proximal tibial osteotomy for varus gonarthrosis. This procedure produced no significant change in patellar ligament length. Pre- and postoperative Insall-Salvati ratios were 0.96+/-0.12 and 0.97+/-0.15, respectively (P=.30). The Insall-Salvati ratio decreased in 29% of patients, and no patient experienced a decline >0.07. The distance between the patella and tibiofemoral joint line ("patellar height") decreased in 100% of patients. The mean Blackburne-Peel ratio declined from 0.75+/-0.13 to 0.53+/-0.15 (P<.001). Sixty-four percent of the postoperative Blackburne-Peel values satisfied the radiographic criterion for patella infera (Blackburne-Peel ratio <0.54). Whereas the loss of patellar height, historically associated with lateral closing wedge proximal tibial osteotomy, is a function of patellar ligament contracture, the decreased distance between the patella and the tibiofemoral joint line following medial opening wedge proximal tibial osteotomy is a function of joint line elevation. The high incidence of patella infera following medial opening wedge proximal tibial osteotomy may have deleterious effects on patellofemoral biomechanics or may complicate subsequent total knee arthroplasty.     

Open-wedge retro-tubercular tibial osteotomy: an innovating technique

Open-wedge tibial osteotomy for varus correction is a common orthopedic procedure. The rate of complications remains significant: loss of correction, nonunion, patellar infera... We propose a new open-wedge technique for tibial osteotomy which has several advantages: less risk of patella infera, improved bone healing, excellent mechanical stability. The osteotomy involves two cuts with an anterior portion ending distally to the tibial tubercle. This preserves the integrity of the patellar tendon and maintains contact between the proximal tibia and the tibial tubercle. Adjunction of an anteroposterior screw adds stability. The anterior plane of the osteotomy provides an excellent surface contact favoring bone healing. The posterior plane is the same as with a "classical" open-wedge osteotomy. The lateral cortical must always remain intact (hinge). The technique described here does not require any specific instrumentation and is compatible with most of the available osteosynthesis implants.     

Locked Lateral Patella Dislocation With Generalized Ligamentous Laxity After Arthroscopic Lateral Release of the Knee

We describe the case of a 14-year-old boy with patellar instability on both sides resulting from ligamentous hyperlaxity and dysplasia of the lateral femoral condyle who had previously undergone an arthroscopic lateral release as well as plication of the medial capsule. The patient presented to our clinic 2 years after surgery with a locked lateral patella dislocation on the left side. The surgical correction involved a substantial open lateral release including an excision of the scar tissue and stabilization of the patella in the patellofemoral groove by tibial tubercle medialization and plication of the medial capsule. Six months after surgery, the patient achieved a Lysholm score of 90 points and clinical examination indicated a stable knee with a centralized patella without any evidence of subluxation or dislocation. Open lateral release with partial resection of the lateral retinaculum, medial reconstruction, and tibial tubercle osteotomy was the procedure of choice in this patient with habitual patella dislocation caused by generalized ligamentous laxity.     

Patellar tendon rupture repair using Dall-Miles cable

Ten patients underwent patellar tendon repair with end-to-end suture technique and medial and lateral retinacular repair, as well as reinforcement with a Dall-Miles cable through the patella and tibial tubercle. The cable was tensioned at 60 degrees of flexion to allow immediate range of motion to at least 100 degrees of flexion and to protect the repair from undue tension while healing. Accurate tendon length was obtained from a lateral radiograph of the noninvolved knee in 60 degrees of flexion. Patients were allowed to bear full weight as tolerated postoperatively. A knee immobilizer was worn for approximately 2 weeks when adequate muscular control of the leg was attained. The cable was removed 6-8 weeks postoperatively, at which time range of motion equal to the opposite extremity was sought. Full extension was obtained by 1 week postoperatively. Average postoperative knee flexion was 88 degrees at 2 weeks, 112 degrees at 1 month, 133 at 3 months, and 138 degrees at 6 months compared to flexion of 141 degrees in the noninvolved knee. Mean quadriceps muscle strength 1 year postoperatively was 72%+/-11% of the noninvolved leg. No patient had patella infera or rerupture after surgery. Repair of a patellar tendon rupture with end-to-end techniques reinforced with a Dall-Miles cable allows immediate rehabilitation without the need for prolonged immobilization. This technique allows restoration of full range of motion early postoperatively and enables patients to regain adequate quadriceps strength.     

关节镜下髌骨支持带调整术联合胫骨结节内移抬高术治疗髌骨外侧半脱位

目的 探讨关节镜下髌骨支持带调整术联合胫骨结节内移抬高术治疗髌骨外侧半脱位的疗效.方法 自2006年3月～2008年1月对16例髌骨外侧半脱位行关节镜下髌骨支持带调整术联合胫骨结节内移抬高术.手术前后采用Lysholm膝关节功能评价表和Tegner下肢运动能力评价表进行评估,并测量手术前后屈膝20°CT片Merchant匹配角、髌骨倾斜角和髌骨外移度.结果 患者获6～28个月随访(平均16个月),术前和术后6个月Lysholm评分分别为(59.00±13.37)分和(92.14±5.15)分(P<0.05),Tegner评分分别为(2.00±1.49)分和(3.30±0.48)分(P<0.05),所有患膝运动能力均较术前有所改善.手术前后Merehant匹配角分别为(21.10±5.61)°和(一1.70±7.41)°(P<0.05),髌骨倾斜角分别为(一4.50±6.45)°和(11.60±2.27)°(P<0.05),髌骨外移度分别为(5.29±3.14)mm和(0.20±1.32)mm(P相似文献   

The length of the patellar tendon after unicompartmental and total knee replacement.

Patella infera may occur after reconstruction of the anterior cruciate ligament (ACL), high tibial osteotomy and total knee replacement (TKR). Restriction of movement of the knee and pain may result. Our aim was to compare the incidence and to assess the effects of patella infera after TKR and unicompartmental knee replacement (UKR). We reviewed radiographs of the knees of 84 patients who had had either TKR or UKR as part of a randomised, controlled trial The length of the patellar tendon was measured on serial radiographs taken before, at eight months and at five years after operation. There was no significant change in the length of the patellar tendon after UKR, but a significant reduction was observed after TKR. Five years after the operation, the shortening of the tendon had increased to a mean of 3.5 mm. Of the knees with TKR reviewed at five years, 34% developed patella infera, defined as 10% or more of shortening, compared with 5% of those with UKR. Shortening was greatest in those knees which had required a lateral release; in this subgroup the mean shortening was 7.2 mm. Shortening correlated with restriction of movement and pain in the knee. Our study has shown that patella infera develops in most patients after TKR with lateral release, and in approximately 25% of patients after TKR without this additional procedure. Patella infera rarely occurs after UKR. It is associated with restriction of movement and pain in the knee. It may be an effect of the more extensive exposure required to perform TKR and may, in part, explain the better clinical results of UKR.     

髌骨半脱位70例治疗分析

目的探讨髌骨半脱位的治疗方法及其预后。方法回顾性分析70例（130膝）髌骨半脱位患者的临床资料,其中男30例,女40例;年龄10～48岁,平均23岁。患者髌骨的形态均为WibergⅡ、Ⅲ型,其中伴有外侧髌股关节骨关节炎者58例108膝,高位髌骨23例46膝,外伤后股四头肌内侧头肌张力不良10例10膝。Q角20°～40°。全部行手术治疗,手术方式包括：髌外侧支持带充分松解（130膝）;髌内侧支持带紧缩、股内侧肌移位至髌骨前内侧（12膝）;髌骨外侧部分切除（17膝）;胫骨结节前、内侧移位（46膝）,平均内移1．0cm、前移1．2cm;缝匠肌前移（11膝）,半腱肌前移（13膝）;关节镜下髌外侧支持带松解,髌内侧支持带紧缩（31膝）。术中见全部病例髌外侧支持带均明显增厚。结果随访3～180个月,根据Insall等评分系统评估分析疗效,术后疗效优78膝,良33膝,可12膝,差7膝。患者术后疼痛、关节活动功能均得到明显改善,尤其是解除膝前痛效果显著。结论根据病因及病理改变选择恰当的手术方式治疗髌骨半脱位均可取得满意的效果,特别是关节镜手术具有创伤小、恢复快的特点,值得进一步推广应用。     

Arthrofibrosis and patella infera: a simple surgical solution. Preliminary report and literature review

Treatment of patella infera and arthrofibrosis after total knee replacement (TKR) remains an unsolved problem. Different options have been proposed: patellectomy, proximal transposition of tibial tuberosity, distalization of the femoral component, arthroscopic and open debridment of intraarticular fibrosis. Individual predisposition, mechanical irritation due to technical errors and an aggressive rehabilitation program have been all related as predisposing or causative factors. We present one patient with patella baja and arthrofibrosis with progressive retraction of patellar tendon treated with open arthrolysis and resection of the distal third of the patella in order to lengthen the tendon and prosthetic resurfacing of the remaining two proximal thirds of the patella. Insall-Salvati, Blackburne and Caton indexes were measured from post-operative X-rays after primary surgery to assess that the cause was not an initial component malposition, before and after our revision procedure.     

Patellar tendon lengthening for patella infera using the Ilizarov technique

Patella infera can cause knee pain and lead to patellofemoral osteoarthritis. Treatment is usually unsatisfactory. We describe a case of severe patella infera after operative treatment for fracture of the patella. We used Ilizarov external fixation and gradual lengthening of the patellar tendon. The patellar height was restored and the patient's symptoms were much improved.     

Patellofemoral disorders and instability

Originally the main idea was to obtain a stable patella, i.e., to stabilize the "slipping patella". In the past many conditions like patella alta, ligamentous laxity, PF bone hypoplasia, weakness of the quadriceps muscle, genu valgum or genu recurvatum were thought to predispose to patellar instability. For a long period muscle exercises were instituted to strengthen the weak m.vastus medialis and to make vastus lateralis stronger. This pulls the patella laterally, especially during running or jumping, when lateral luxation of the patella occurs. Muscle imbalance as well as anatomical abnormalities are the basis both for patellar instabilities and reasonable surgical procedures were: proximal extensor mechanism realignment, proximal capsular reefing, patellar tendon splitting and its medial transfer. On the other hand bone procedures on the hypoplastic lateral femoral condyle were also performed by Albee, as well as tibial tubercle transfer and trochleoplasty by deepening of the trochlea (Dejour). An understanding of the pathoanatomic basis is the corner stone for     

内侧髌股韧带联合髌胫韧带重建治疗复发性髌骨脱位

目的评价用半腱肌腱重建内侧髌股韧带和用髌韧带内1/3重建髌胫韧带治疗复发性髌骨脱位的临床疗效和影像学结果。方法回顾性分析我科2013年6月至2018年6月收治的25例复发性髌骨脱位患者,其中男性6例,女性19例;年龄15~38岁,平均(22.36±5.20)岁。全部患者均在麻醉下取半腱肌肌腱重建髌股韧带,取髌韧带内1/3带胫骨结节骨块重建髌胫韧带。术后复查CT和X线,测量髌骨-股骨适配角、髌骨倾斜角,髌骨外移度、Caton指数、胫骨结节-股骨滑车沟(tibial tubercle-trochlear groove,TT-TG)距离值作为影像学评价;以膝关节功能Lyshlom评分、Kujala评分、J形征和恐惧试验作为临床疗效评价。结果25例患者均获得随访,随访时间12~48个月,平均(18.16±6.85)个月。患者术后均未再次脱位。Kujala评分:术前(54.60±11.08)分,术后(75.40±7.49)分;Lysholm评分:术前(43.48±6.78)分,术后(93.20±3.52)分;手术前后比较差异有统计学意义(P<0.05)。影像学检查结果提示,髌骨-股骨适配角:术前(13.74±5.09)°,术后(4.14±2.52)°;髌骨倾斜角:术前(16.89±4.09)°,术后(3.40±1.37)°;髌骨外移度:术前(33.14±3.99)mm,术后(7.40±2.69)mm;手术前后比较差异有统计学意义(P<0.05)。TT-TG值、Caton指数手术前后比较差异无统计学意义(P>0.05)。查体J形征阴性,恐惧试验阴性。结论本研究采用半腱肌肌腱重建髌股韧带联合髌韧带内1/3重建髌胫韧带治疗复发性髌骨脱位,在技术上是安全,可在短期随访时间内取得良好的临床效果。     

Medial patellofemoral ligament reconstruction with gracilis autograft for patellar instability

We describe a technique for patellar stabilization by reconstruction of the medial patellofemoral ligament with the gracilis tendon. The tendon is anchored posteriorly on the soft tissue of the medial femoral epicondyle and anteriorly on the medial border of the patella. The plasty is completed by suture of the medial patellar wing. Inferior or medial transposition of the tibial tubercle may be associated. We have used this technique since 1995 for 145 knees with patellar instability. The small incisions have the advantages of minimally invasive surgery, particularly for the postoperative period and the cosmetic effect.     

In‐vivo patellar tendon kinematics during weight‐bearing deep knee flexion

This study quantified in‐vivo 3D patellar tendon kinematics during weight‐bearing deep knee bend beyond 150°. Each knee was MRI scanned to create 3D bony models of the patella, tibia, femur, and the attachment sites of the patellar tendon on the distal patella and the tibial tubercle. Each attachment site was divided into lateral, central, and medial thirds. The subjects were then imaged using a dual fluoroscopic image system while performing a deep knee bend. The knee positions were determined using the bony models and the fluoroscopic images. The patellar tendon kinematics was analyzed using the relative positions of its patellar and tibial attachment sites. The relative elongations of all three portions of the patellar tendon increased similarly up to 60°. Beyond 60°, the relative elongation of the medial portion of the patellar tendon decreased as the knee flexed from 60° to 150° while those of the lateral and central portions showed continuous increases from 120° to 150°. At 150°, the relative elongation of the medial portion was significantly lower than that of the central portion. In four of seven knees, the patellar tendon impinged on the tibial bony surface at 120° and 150° of knee flexion. These data may provide useful insight into the intrinsic patellar tendon biomechanics during a weight‐bearing deep knee bend and could provide biomechanical guidelines for future development of total knee arthroplasties that are intended to restore normal knee function. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 30:1596–1603, 2012     

The pathophysiology of Osgood-Schlatter disease: a magnetic resonance investigation

Osgood-Schlatter disease (OSD) is a well-described clinical condition, although its origin remains controversial. Mechanical, growth or traumatic factors are suggested as causes of this lesion. Thirty-five patients were included in this study. Twenty of them had OSD (study group) and the remaining 15 adolescents constituted the control group. Magnetic resonance imaging of the knees was performed in all patients. The distance between the distal pole of the patella and the proximal margin of patellar tendon attachment to the tibial apophysis (A), the distance between the distal pole of the patella and the tibial tubercle epiphysis (B), the distance between the proximal margin of the patellar tendon attachment to the tibia and the tibial tubercle epiphysis (C) and the distance between the knee joint level and the tibial tubercle epiphysis (D) were measured. The ratio of the distance between the distal pole of the patella and the proximal margin of the patellar tendon attachment to the tibia to the distance between the distal pole of the patella and the tibial tubercle epiphysis (A : B) was lower in the study group. The ratio of the distance between the proximal margin of the patellar tendon attachment point to the tibia and the tibial tubercle epiphysis to the distance between the knee joint level and the tibial tubercle epiphysis (C : D) was higher in the control group. We conclude that if the patellar tendon attaches more proximally and in a broader area to the tibia, this might probably cause OSD.     

髌腱内移和髌内侧筋膜肌肉瓣外移治疗先天性髌骨脱位

目的评价髌腱内移和髌内侧筋膜肌肉瓣外移术治疗先天性髌骨脱位的效果。方法自1994年6月～1998年6月,采用髌腱内移和内侧筋膜肌肉瓣外移的方法治疗先天性髌骨脱位5例,男2例,女3例,平均年龄7岁(4～10岁)。4例为单侧髌骨脱位,1例为双侧(只治疗一侧),均未合并其它畸形。结果术后随访1.5～5年,平均3年,无手术并发症,无术后再脱位和半脱位。4例膝关节能完全伸直,1例差10°;2例膝外翻消失;1例10岁女童术后出现髌骨低位,但膝外翻消失、功能正常且伸膝有力。结论先天性髌骨脱位是一种持续、不可复性脱位,需手术治疗。髌内侧筋膜肌肉瓣外移和髌腱内移术操作简单,损伤较小,并发症少,效果优良,是一种值得推荐的手术方法。     

胫骨结节内移抬高术联合关节镜下髌骨支持带调整术治疗复发性髌骨脱位的疗效研究

目的探讨胫骨结节内移抬高术联合关节镜下髌骨支持带调整术治疗复发性髌骨脱位的疗效。方法自2008年至2012年对12例复发性髌骨脱位行关节镜下髌骨外侧支持带松解、内侧支持带紧缩联合胫骨结节内移抬高术。术后6周、3个月、6个月、12个月、2年、5年进行门诊随访,物理检查包括髌骨内移度检查,髌骨外推恐惧试验,复查轴位X线片了解截骨块愈合情况、髌股关节适合角、髌骨指数,Lysholm膝关节功能评价表、IKDC评分和Kujala评分表进行评估。结果所有患者均获随访,随访时间1~5年,平均2.0年。术后3~6个月复查X线片见截骨块以达到骨性愈合,在负重行走并行膝关节屈伸功能锻炼,膝关节功能恢复良好。术后髌骨内移度均介于1°~2°之间,术后各时间点髌骨外推恐惧试验阳性率、髌骨适合角、髌骨指数与术前比较,差异均有统计学意义（P〈0.05）;术后各时间点间比较,差异均无统计学意义（P〉0.05）。术后6、12个月,IKDC、Lysholm、Kujala评分均较术前显著提高,差异均有统计学意义（P〈0.05）。术后6、12个月IKDC、Lysholm评分比较,差异无统计学意义（P〉0.05）。术后12个月Kujala评分较术后6个月显著提高,差异有统计学意义。结论关节镜下髌骨外侧支持带松解、内侧支持带紧缩联合胫骨结节内移抬高术能够有效治疗复发性髌骨脱位。