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Knee lateral retinaculum

Hülya Kurtul Yildiz, Elif Evrim Ekin
PURPOSE: The medial patellofemoral ligament (MPFLL)/lateral patellar retinaculum (LPR) ratio were assessed in knees as a means to detect patellar malalignment. We also aimed to evaluate the prevalence of the various types of trochlear dysplasia in patients with patellar malalignment. MATERIALS AND METHODS: After approval of our institutional ethics committee, we conducted a retrospective study that included 450 consecutive patients to evaluate them for the presence of patellar malalignment...
2016: SpringerPlus
Sercan Capkin, Gulsah Zeybek, Ipek Ergur, Can Kosay, Amac Kiray
OBJECTIVE: The lateral patellofemoral ligament (LPFL) is part of the lateral retinaculum cut during arthroscopic or open release. We investigated its anatomic and morphometric characteristics. MATERIALS AND METHODS: We identified the LPFL insertion point on the condyle in vertical and sagittal planes in 32 adult cadaveric knees. We measured its length and width at the insertion point. We located the midpoint of this point and measured from it to the distal and posterior condylar ends...
August 8, 2016: Acta Orthopaedica et Traumatologica Turcica
A P Rosales-Varo, O Roda-Murillo, N Prados-Olleta, M A García-Espona
OBJECTIVE: To describe a novel coronal osteotomy of the external facet of the patella, and to evaluate if the outcomes of the treatment of lateral knee compartment syndrome (LKCS) with this osteotomy, combined with the release of the external lateral retinaculum, are better than the isolated lateral retinacular release. MATERIAL AND METHODS: A prospective study with a 2 year follow up that included 70 patients diagnosed with LKCS, distributed into 2 groups. The first group included 50 patients on whom the lateral retinacular release combined with osteotomy was performed, and a second group on whom an isolated retinacular release was performed...
September 2016: Revista Española de Cirugía Ortopédica y Traumatología
H-R Springorum, C Baier, B Craiovan, G Maderbacher, T Renkawitz, J Grifka, A Keshmiri
INTRODUCTION: Patellofemoral maltracking is a relevant problem after total knee arthroplasty (TKA). Patella navigation is a tool that allows real time monitoring of patella tracking. MATERIAL: This video contribution demonstrates the technique of patellofemoral navigation and a possible consequence of intraoperative monitoring. A higher postoperative lateral tilt is addressed with a widening of the lateral retinaculum in a particular manner. CONCLUSION: In selected cases of patellofemoral problems, patella navigation is a helpful tool to evaluate patellofemoral tracking intraoperatively...
July 2016: Der Orthopäde
Mohd Fairudz Bin Mohd Miswan, Mohamed Zubair Mohamed Al-Fayyadh, Teo Seow Hui, Mohamed Razif Bin Mohamed Ali, Wuey Min Ng
A patient with patellar instability frequently presents with anterior knee pain, patellar subluxation, or dislocation. Medial patellofemoral ligament (MPFL) has a key role for normal patella tracking and stability. Reconstruction of the MPFL using a hamstring graft is a commonly used procedure for the treatment of chronic lateral subluxation of patella. Anchor sutures and bony tunnels are used for the patellar attachment of the graft. This can be associated with complications such as patella fracture; besides, it does not produce an anatomical reconstruction for the native MPFL that can alter the direction of tension applied on the patella...
April 2016: Arthroscopy Techniques
Gangyong Huang, Jun Xia, Siqun Wang, Yibing Wei, Jianguo Wu, Feiyan Chen, Jie Chen, Jingsheng Shi
BACKGROUND: Apart from transepicondylar axis, the native femoral sulcus was also reported to be used as a guide for the femoral component position in total knee arthroplasty (TKA). However, it was not shown in patients with severe knee osteoarthritis. This study was conducted to compare the position of trochlear groove in patients with and without osteoarthritis, and to assess whether trochlear groove could be used as a guide for position of femoral component in TKA for severe knee osteoarthritis...
2016: BMC Surgery
K-D Heller
BACKGROUND: Patellofemoral complications after total knee arthroplasty are responsible for a variety of surgical revisions. OBJECTIVE: The causes of the various types of instability of the patella are listed in a differentiated way and the importance of clinical and imaging diagnostics as well as preventive strategies are elaborated. MATERIAL AND METHODS: This article is based on a selective literature search in the PubMed database and on the long-standing experience of the author...
May 2016: Der Orthopäde
Zhu Dai, Di You, Ying Liao, Zhiwei Chen, Jiabin Peng
OBJECTIVE: To explore the treatment methed of recurrent patellar dislocation associated with old osteochondral fracture and to evaluate its effectiveness. METHODS: Between August 2010 and August 2014, 12 cases of recurrent patellar dislocation with old osteochondral fracture were treated. There were 4 males and 8 females with an average age of 18.3 years (range, 15-24 years). The left knee was involved in 7 cases and the right knee in 5 cases. All the patients had a history of patellar dislocation, the average interval from injury to first hospitalization was 7...
January 2016: Chinese Journal of Reparative and Reconstructive Surgery
Hee Kyung Kim, Sahar Shiraj, Chang Ho Kang, Christopher Anton, Dong Hoon Kim, Paul S Horn
OBJECTIVE: The purpose of this study was to compare MRI findings between groups with and without patellofemoral instability and to correlate the MRI findings with the severity of patellar cartilage damage. MATERIALS AND METHODS: Fifty-three children with patellofemoral instability and 53 age- and sex-matched children without patellofemoral instability (15.9 ± 2.4 years) were included. Knee MRI with T2-weighted mapping was performed. On MR images, femoral trochlear dysplasia, patellofemoral malalignment, medial retinaculum injury, and bone marrow edema were documented...
June 2016: AJR. American Journal of Roentgenology
Hatai A Yiding-Xia, Keyuan Zhang, Yang Liu
OBJECTIVE: To study the effect of the femoral tunnel position on the knee function recovery after medial patellofemoral ligament (MPFL) reconstruction. METHODS: A retrospective analysis was made on the clinical date of 43 cases (43 knees) of recurrent patellar dislocation undergoing MPFL reconstruction and patellofemoral lateral retinaculum lysis between August 2013 and March 2014. There were 12 males and 31 females, aged 19.4 years on average (range, 9-35 years)...
August 2015: Chinese Journal of Reparative and Reconstructive Surgery
Brandon J Erickson, Kevin Campbell, Gregory L Cvetanovich, Joshua D Harris, Bernard R Bach, Seth L Sherman
Knee pain is one of the most frequent complaints evaluated by orthopedic surgeons. It encompasses a broad range of pathology and can present in a variety of ways. Most of this pain can be attributed to essential structures of the knee, including the menisci, cruciate or collateral ligaments, and articular cartilage. However, there are underrecognized structures in and around the knee that can frequently be a cause of knee pathology and pain. Knee pain stemming from these structures may be missed or incorrectly diagnosed, and these patients often present for second and third opinions because of failure to diagnose and treat the underlying pathology...
January 2016: Orthopedics
Nancy A Chauvin, Asef Khwaja, Monica Epelman, Michael J Callahan
BACKGROUND: We report the radiologic findings of herniation of Hoffa's fat pad through a defect in the lateral patellar retinaculum in young children who presented with painless masses visible by ultrasound (US) only with flexion of the knee. MATERIAL AND METHODS: Six children, between the ages of 1-8 years, presented with an anterolateral knee mass that was not tender and was only seen and palpable with knee flexion. An US was performed in all patients, magnetic resonance imaging (MRI) in 2 patients and knee radiographs in 1 patient...
April 2016: Pediatric Radiology
Brian Noehren, Logan Shuping, Aron Jones, David A Akers, Heather M Bush, Kathleen A Sluka
OBJECTIVES: Chronic patellofemoral pain (PFP) is a common orthopedic condition for which little is understood of the alterations in pain processing such as hyperalgesia, hypoesthesia, and the relationship of altered knee mechanics to hyperalgesia. We assessed pain, pressure pain thresholds (PPT), detection to light touch, and the relationship of pain and PPTs to knee abduction angle during a stair step down task between females with and without PFP. MATERIALS AND METHODS: Twenty females diagnosed with PFP and 20 age-matched pain-free females participated in this study...
October 2016: Clinical Journal of Pain
Michael G Saper, David A Shneider
Medial patellar subluxation is a poorly recognized clinical condition characterized by chronic anterior knee pain that is exacerbated with knee flexion. Additional symptoms include instability, limited knee motion, and pain with squatting and stair climbing. Full characterization of the patient's knee pain requires an accurate history and physical examination. Diagnosis is typically confirmed during diagnostic arthroscopy. When nonsurgical management (eg, physical rehabilitation, patella-stabilizing bracing) fails, surgery (eg, medial retinacular release, lateral retinacular imbrication, newer techniques to repair or reconstruct the lateral retinaculum/lateral patellofemoral ligament) can lead to good results...
November 2015: American Journal of Orthopedics
Addison Wilson, Afshin Afarin, Corey Shaw, Eric Shirley, Jennifer Pierce, Joseph B Slakey
BACKGROUND: Acute patellar dislocation (APD) is a common knee injury in children. The pattern and frequency of injury to the medial patellofemoral ligament (MPFL) is different in pediatric compared with adult populations. PURPOSE: To report on injury patterns sustained to the MPFL after APD in children and to determine whether predisposing factors for APD cited in adults hold true in the pediatric population. STUDY DESIGN: Case series; Level of evidence, 4...
November 2013: Orthopaedic Journal of Sports Medicine
Junwei Zhang, Chin Hwee Lee
A 14-year-old girl presented with left knee pain and swelling after an injury. Magnetic resonance (MR) imaging showed a transient lateral patellar dislocation with patellar osteochondral fracture, medial patellofemoral ligament tear and underlying femoral trochlear dysplasia. Open reduction and internal fixation of the osteochondral fracture, plication of the medial patellar retinaculum and lateral release were performed. As lateral patellar dislocation is often clinically unsuspected, an understanding of its characteristic imaging features is important in making the diagnosis...
October 2015: Singapore Medical Journal
Masahiro Satoh, Hiroyuki Yoshino, Akira Fujimura, Jiro Hitomi, Sumio Isogai
When patients report pain in the popliteal fossa upon knee extension, the pain is usually localized in the lower region of the popliteal fossa. However, some patients complain of pain in the upper region of the popliteal fossa as the knee is flexed, which motivated us to examine the role of the popliteal fascia as the retinaculum of the hamstring muscles. Thirty-four thighs from 19 Japanese cadavers were dissected. The popliteal fascia was defined as the single aponeurotic sheet covering the popliteal fossa...
September 2016: Anatomical Science International
Masataka Nishikawa, Hajime Owaki, Shoichi Kaneshiro, Takeshi Fuji, Kenrin Shi
A case of acquired permanent dislocation of the patella associated with severe genu valgum in a patient with rheumatoid arthritis (RA) is herein reported. The pain and genu valgum progressed because of poor RA control. The patient had no history of major trauma of the knee before or after the onset of RA. The most reasonable hypothesis to explain this patient's pathology is that occult patellar dislocation developed after a minor trauma and progressed to permanent dislocation; poor RA control then worsened both the patellar dislocation and genu valgum...
June 2015: Journal of Clinical Orthopaedics and Trauma
Vicente Sanchis-Alfonso, Alan C Merchant
Iatrogenic medial patellar instability is a specific condition that frequently causes incapacitating anterior knee pain, severe disability, and serious psychological problems. The diagnosis should be suspected in a patient who has undergone previous patellar realignment surgery that has made the pain worse. The diagnosis can be established by physical examination and simple therapeutic tests (e.g., "reverse" McConnell taping) and confirmed by imaging techniques. This iatrogenic condition should no longer exist and could almost be eliminated by avoiding over-release of the lateral retinaculum...
August 2015: Arthroscopy: the Journal of Arthroscopic & related Surgery
Guan-Yang Song, Lei Hong, Hui Zhang, Jin Zhang, Yue Li, Hua Feng
PURPOSE: Iatrogenic medial patellar instability (IMPI) is a disabling but easily missed condition that is most often seen as a late complication of lateral retinacular release (LRR) procedures. The purposes of this study were (1) to summarize the available diagnostic methods and (2) to explore the contributing factors of IMPI following LRR procedures. METHODS: The MEDLINE, PubMed, EMBASE and Cochrane Library databases were searched for studies including diagnosed IMPI cases following LRR procedures...
September 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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