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Knee lateral retinaculum

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https://www.readbyqxmd.com/read/29424164/-research-progress-on-the-etiology-and-treatment-of-patellofemoral-pain-syndrome
#1
REVIEW
Li-Hua Cui
Patellofemoral pain syndrome (PFPS) is one of the most common diseases that cause pain in the knee joint. At present, there is no specific diagnostic measure. The diagnosis of patellofemoral pain syndrome may be considered when imaging is performed without cartilage, ligament and soft tissue injuries. The etiology includes abnormalities of the patellar motion caused by various anatomical abnormalities, such as abnormal patellar position, increased Q angle, and excessive valgus foot. Dysfunction of the lower extremity muscles such as the imbalance of the four biceps and the dysfunction of the gluteal muscles also play an important role in the development of patellofemoral pain syndrome...
July 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349990/-experimentation-of-the-relationship-between-medial-or-lateral-patellar-stabilizer-and-patellofemoral-stabilization
#2
Xing-Sen Liang, Zheng-Hong Yu, Yi-Kai Li, Ying-Ping Jiang, Xian-Wu Chen, Min Huang
OBJECTIVE: To study the contribution of medial or lateral stabilizer to the stability of the patella, to explore the function and effect of releasing the LPR clinically and to provide a biomechanical basis for the clinical treatment of patellar instability(PI). METHODS: The quadriceps femoris of 6 fresh human cadaver knees were loaded to simulate a normal condition of muscle strength. First the loading force was measured and recorded, which subluxated the patella with the different degrees of knee flexion...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349030/augmentation-of-patellar-tendon-repair-with-autologous-semitendinosus-graft-porto-technique
#3
João Espregueira-Mendes, Renato Andrade, M J S Fredrick Michael, André Sarmento, Nuno Sevivas, Rui Rocha, Ricardo Bastos Filho
Patellar tendon ruptures can lead to significant functional deficiency of the extensor mechanism of the knee. These injuries, because of their inherent nature and associated complications, may require a complex treatment and remains a challenge for orthopaedic surgeons. Current surgical techniques present significant complications, including patellar fracture, damage to patellar articular cartilage, and abnormal patella height. This note describes a surgical technique to provide an additional reinforcement to the patellar tendon repair with a semitendinous autograft, without the necessity to perform any transosseous tunnels at the patella bone...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29205448/soft-tissue-masses-of-the-knee-related-to-a-focal-defect-of-the-lateral-patellar-retinaculum
#4
Antoine Moraux, Stefano Bianchi, Thomas le Coroller
We report on the imaging features of 6 soft tissue masses in the anterolateral aspect of the knee related to a focal defect of the lateral patellar retinaculum. In 4 patients (3 female and 1 male; 6-65 years) presenting with nontender palpable soft tissue masses in the anterolateral aspect of their knees, ultrasonography showed a focal defect of the lateral patellar retinaculum with herniation of the Hoffa fat pad, which was only visible in flexion. A magnetic resonance imaging examination performed in 1 case confirmed the defect in the lateral patellar retinaculum but did not show a mass, as the knee was examined only at 10° of flexion...
December 4, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29188420/a-lateral-retinacular-release-during-total-knee-arthroplasty%C3%A2-changes-femorotibial-kinematics-an-in-vitro-study
#5
Arnd Steinbrück, Christian Schröder, Matthias Woiczinski, Alexander Glogaza, Peter E Müller, Volkmar Jansson, Andreas Fottner
INTRODUCTION: Lateral retinacular release (LRR) is a common procedure during total knee arthroplasty (TKA), especially if patellar maltracking is observed intraoperatively. The impact of LRR on patellofemoral kinematics is well-examined, but the influence on femorotibial kinematics requires more elucidation. Therefore, the aim of this study was to evaluate the effects of LRR on femorotibial kinematics in vitro. MATERIALS AND METHODS: A fixed bearing TKA was implanted in six human knee specimens...
November 29, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29137665/treatment-for-lateral-patellar-impingement-syndrome-with-arthroscopic-lateral-patelloplasty-a-bidirectional-cohort-study
#6
Tianhao Wu, Shiyu Tang, Fei Wang
BACKGROUND: Anterior knee pain is one of the most common musculoskeletal complaints of young patients. We notice that some patients had normal femoral trochlear, medial and lateral patellar retinaculum, and special patellar morphology, which resulted in a series of symptoms in the flexion of the knee due to the impingement of the lateral articular surface of the patella with the femur. We firstly termed this pathologic process as lateral patellar impingement syndrome (LPIS). This ambispective cohort study was to explore the curative effect of arthroscopic lateral patelloplasty for early LPIS...
November 14, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28702749/evaluation-of-different-surgical-methods-in-treating-recurrent-patella-dislocation-after-three-dimensional-reconstruction
#7
Hao Du, Xiao-Xiao Tian, Fa-Qi Guo, Xiang-Ming Li, Tao-Tao Ji, Bin Li, Tong-Sen Li
PURPOSE: Recurrent patella dislocation (RPD) is the most common complication of patellar instability. The effects of different surgical techniques on the outcome of RPD treatments remain unclear. This study was conducted to compare the effects of three surgical techniques in treating RPD by three-dimensional (3D) reconstruction from computed tomography (CT) scans. METHODS: Sixty-eight patients with RPD and no previous surgical treatments who attended our hospital between October 2010 and 2013 were enrolled and randomly assigned into three groups: (1) medial patellofemoral ligament (MPFL) reconstruction and medial patellar retinaculum (MPR) plication group; (2) lateral patellar retinaculum (LPR) release and MPR plication group; and (3) MPFL reconstruction and LPR release group...
December 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28666036/arthroscopic-excision-of-bipartite-patella-with-preservation-of-lateral-retinaculum-in-an-adolescent-ice-hockey-player
#8
Evan W James, Christopher M LaPrade, Jorge Chahla, Mark E Cinque, Nicholas I Kennedy, Robert F LaPrade
Bipartite patella usually is an asymptomatic anatomical variant. However, in some adolescent athletes, it causes anterior knee pain, resulting in decreased participation and performance. We report the case of a high-level adolescent ice hockey player who underwent successful arthroscopic excision with preservation of the lateral retinaculum of a symptomatic bipartite patella after failed nonoperative treatment. The patient returned to play by 6 weeks, and 31-month subjective follow-up scores showed high satisfaction and good clinical outcomes...
May 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28602535/periarticular-injections-in-knee-and-hip-arthroplasty-where-and-what-to-inject
#9
Jeremy A Ross, Anna C Greenwood, Phillip Sasser, William A Jiranek
BACKGROUND: Periarticular injections have become a valuable adjunct to multimodal pain control regimens after knee and hip arthroplasties. Injection techniques vary greatly among surgeons with little standardization of practice. METHODS: We performed an extensive literature search to determine where nociceptive pain fibers are located in the hip and the knee and also to explore the pharmacology of periarticular cocktail ingredients. RESULTS: Large concentrations of nociceptors are present throughout the various tissues of the knee joint with elevated concentrations in the infrapatellar fat pad, fibrous capsule, ligament insertions, periosteum, subchondral bone, and lateral retinaculum...
September 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28585993/a-modified-lateral-approach-for-total-knee-replacement-in-type-2-valgus-deformity
#10
Matthias Aurich, Mark Lenz, Norman Best
Total knee replacement for patients with osteoarthritis and valgus deformity remains challenging, with soft tissue balance often difficult to achieve. Most orthopedic surgeons use the medial parapatellar approach for total knee replacement. However, the lateral approach described in this case allows direct access to the pathology. The valgus deformity is corrected by using a modified lateral parapatellar arthrotomy with a staged and gradual release of the contracted lateral capsuloligamentous structures and the iliotibial tract...
September 1, 2017: Orthopedics
https://www.readbyqxmd.com/read/28465849/mobile-bearing-total-knee-arthroplasty-for-valgus-knee-osteoarthritis-with-permanent-patellar-dislocation-a-case-report-and-review-of-the-literature
#11
Kohei Kamada, Tomoyuki Matsumoto, Koji Takayama, Daisuke Araki, Shingo Hashimoto, Shinya Hayashi, Takehiko Matsushita, Ryosuke Kuroda
Permanent patellar dislocation with tibiofemoral joint osteoarthritis is a relatively rare condition. To treat this condition, total knee arthroplasty with proximal or distal realignment of the extensor mechanism has been reported. We report a challenging case of an 80-year-old woman diagnosed with permanent patellar dislocation with tibiofemoral joint osteoarthritis treated by a mobile bearing total knee arthroplasty utilizing navigation system. Lateral retinaculum release was performed to improve patellar tracking; other proximal or distal realignment of the extensor mechanism was not necessary...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28437490/the-diagnosis-and-initial-treatment-of-patellofemoral-disorders
#12
REVIEW
Alan C Merchant, John P Fulkerson, Wayne Leadbetter
Our purpose is to provide simple guidelines for the diagnosis and early care of patellofemoral disorders. Any clinician who treats knee problems, including family practitioners, rheumatologists, orthopedic surgeons, or physical therapists, must know how to make the correct diagnosis, or at least a presumptive diagnosis, at the initial visit. This can avoid unneeded and costly tests, ineffective treatment, and even damaging exercises and unnecessary surgery. The diagnosis of patellofemoral disorders is confusing because they can have many causes...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28378002/total-knee-arthroplasty-for-treatment-of-osteoarthritis-with-prolonged-patellar-dislocation
#13
Kosuke Kumagai, Mitsuhiko Kubo, Tsutomu Maeda, Susumu Araki, Suguru Shioji, Noriaki Okumura, Hitomi Fujikawa, Taku Kawasaki, Shinji Imai, Yoshitaka Matsusue
Prolonged dislocation of the patella is a rare condition and is often related to severe osteoarthritis (OA) of the femorotibial (FT) joint. For this condition's treatment, numerous surgical techniques using total knee arthroplasty (TKA) have been published. To the best of our knowledge, this case report is the first description of the use of lateral release alone to treat recurrent patellar subluxation with TKA. An interesting point in this case is that the patient had a good recovery after TKA in spite of quite a long-term (a duration of almost 55 years) dislocation of her patella and development of secondary OA...
March 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28318865/anterior-vs-posterior-periarticular-multimodal-drug-injections-a-randomized-controlled-trial-in-simultaneous-bilateral-total-knee-arthroplasty
#14
Artit Laoruengthana, Piti Rattanaprichavej, Supachok Rasamimongkol, Monton Galassi
BACKGROUND: Currently, various techniques are used to overcome postoperative pain after total knee arthroplasty. A local analgesic infiltration with periarticular multimodal drug injection (PMDI) is favorable because of its simplicity, safety, and efficacy. The present study compared the efficacy of a PMDI at the anterior vs posterior compartments. METHODS: Forty-six patients were randomized to receive the PMDI at either the anterior or posterior compartment, with the contralateral knee receiving the PMDI at the opposite compartment...
July 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28199129/a-focal-defect-at-the-lateral-patellar-retinaculum-on-clinical-knee-mri-and-cadaveric-study-a-normal-variant-or-pathologic-lesion
#15
Ji Su Kim, Seong Jong Yun, Wook Jin, Gou Young Kim, So Young Park, Ji Seon Park, Kyung Nam Ryu
OBJECTIVE: The purpose of this study is to retrospectively investigate the frequency of a focal defect at the lateral patellar retinaculum on knee MRI and to determine the variables that are significantly associated with the defect. MATERIALS AND METHODS: Two radiologists independently reviewed 99 knee MR images for the presence of a focal defect at the lateral patellar retinaculum and categorized patients with concordant results into two groups: a group with the defect (≥ 3 mm; group 1) and a group without the defect (< 3 mm; group 2)...
May 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28120923/relationship-between-bony-tunnel-and-knee-function-in-patients-after-patellar-dislocation-triple-surgeries-a-ct-based-study
#16
Le Qin, Mei Li, Weiwu Yao, Ji Shen
We aimed to assess the CT-based bony tunnel valuations and their correlation with knee function after patellar dislocation triple surgeries. A retrospective study was performed on 66 patients (70 knees) who underwent patellar dislocation triple surgeries. The surgery was MPFL reconstruction primarily, combined with lateral retinaculum release and tibial tubercle osteotomy. CT examinations were performed to determine the femoral tunnel position, along with the patellar and femoral tunnel width 3 days and more than 1 year after operation for follow-up...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27994926/intraarticular-giant-size-angiolipoma-of-the-knee-causing-lateral-patellar-dislocation
#17
Gökhan İlyas, Ali Turgut, Duygu Ayaz, Önder Kalenderer
BACKGROUND: Angiolipomas are benign tumors usually seen in patients during their 2(nd) and 3(rd) decades. The subcutaneous region of the trunk, neck and extremities are the places where they generally settle. There is only one case report on angiolipoma in the knee joint that was resected by arthroscopic procedure in the English literature. CASE REPORT: We present a case of a giant-size multilobular non-infiltrating angiolipoma, extending outside of the right knee joint and causing lateral patellar dislocation in a thirteen-year-old boy...
November 2016: Balkan Medical Journal
https://www.readbyqxmd.com/read/27652073/patellar-malalignment-a-new-method-on-knee-mri
#18
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
https://www.readbyqxmd.com/read/27516002/an-anatomic-study-of-the-lateral-patellofemoral-ligament
#19
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...
January 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27435989/coronal-patellar-osteotomy-of-the-external-facet-combined-with-the-release-of-the-lateral-retinaculum-improves-the-clinical-outcomes-of-isolated-lateral-release-in-lateral-knee-compartment-syndrome
#20
COMPARATIVE STUDY
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
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