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https://www.readbyqxmd.com/read/29739709/osteonecrosis-of-bipartite-patella-following-total-knee-arthroplasty-without-lateral-release
#1
Jung Ho Noh, Young Hak Roh
We present a case of osteonecrosis of bipartite patella occurring after total knee arthroplasty using medial parapatellar approach without lateral retinacular release in osteoarthritic knee of a 66 year-old-male. The surgery was performed using traditional technique with medial parapatellar approach and patella was resurfaced. Patella was everted during surgery. There was no event during follow-up period after surgery. Range of motion of the knee was 135° without flexion contracture. Eight months after the surgery, patella was fragmented and resorbed on the radiographs which was consistent with osteonecrosis...
May 5, 2018: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29611163/cadaveric-biomechanical-study-on-medial-retinaculum-its-stabilising-role-for-the-patella-against-lateral-dislocation
#2
Leonidas Mitrogiannis, Alexandra Barbouti, Panagiotis Kanavaros, Georgios Paraskevas, Aikaterini Kitsouli, Georgios Mitrogiannis, Panagiotis Kitsoulis
BACKGROUND: The aim of this study was to analyse the biomechanical role of medial retinaculum, as a stabilising factor against lateral patellar dislocation. MATERIALS AND METHODS: This cadaveric-biomechanical study included the patellae of ten cadaveric knees, which were surgically exposed and the medial retinaculum of each one was located. A stable 24.51N force was applied to the four parts of the quadriceps, and an increasing lateral displacing force was applied to the patella, up to 5mm dislocation...
April 3, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29578896/herniation-of-hoffa-s-fat-pad-through-the-lateral-retinaculum-usefulness-of-dynamic-ultrasonography-to-diagnose-a-lateral-knee-mass
#3
Kamal Mezian, Ke-Vin Chang, David Zámečník, Hassan Mezian, Levent Özçakar
No abstract text is available yet for this article.
March 24, 2018: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/29500485/mri-findings-associated-with-medial-patellofemoral-capsuloligamentous-plication
#4
William R Walter, Hien Pham, Robert J Meislin, Laith M Jazrawi, Christopher J Burke
OBJECTIVE: To review the MRI appearance of medial patellofemoral capsuloligamentous plication (also known as reefing or imbrication) for proximal patellar realignment in patients with patellofemoral instability. MATERIALS AND METHODS: Retrospective analysis of our surgical and PACS databases identified cases of medial plication performed between June 2011 and July 2016. Pre- and postoperative MRI characteristics were reviewed. Correlation was made with operative reports and clinical records to define postoperative appearances on MRI...
March 2, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29457397/-reconstruction-of-medial-patellofemoral-ligament-with-tightrope-button-fixation-on-the-femoral-side-for-the-treatment-of-traumatic-patellar-dislocation
#5
Yong-Xiang Zuo, Zi-Ping Ma
OBJECTIVE: To explore the operating procedures and therapeutic effects of medial patellofemoral ligament reconstruction with Tightrope(Arthrex, FL, USA) button fixation at lateral femoral cortex. METHODS: From May 2014 to July 2016, 9 patients with traumatic patellar dislocation were treated. There were 5 males and 4 females, ranging in age from 16 to 47 years old, with an average of 23.7 years old. All the patients underment arthroscopic lateral retinaculum release and joint debridement first...
November 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29457387/-multi-point-fixation-with-absorbable-cartilage-screws-for-the-treatment-of-osteochondral-fracture-caused-by-patellar-instability
#6
Xu-Hui Zhang, Lei Xia, Gang-Tao Wang, Tan Li
OBJECTIVE: To study clinical effects of multi-point fixation with bioabsorbable cartilage screws for the treatment of osteochondral fracture caused by patellar instability. METHODS: During the period from August 2014 to Steptember 2016, there were 21 patients with osteochondral fracture caused by patellar dislocation, including 7 males and 14 females, ranging in age from 12 to 42 years old, with an average of 27 years old. During the operation, free fractures fragments of cartilage were found with a open surgery, and the patients were treated with fixation by absorbable cartilage screws combined with lateral retinaculum release and medial retinaculum shrinkage...
November 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29457386/-treatment-of-habitual-dislocation-of-patella-with-reconstruction-of-medial-patellofemoral-ligament-combined-with-release-of-lateral-retinaculum-and-medial-transfer-and-advancement-of-tibial-tuberosity-under-arthroscopy
#7
Li-Chuang Wu, Hai-Bo Zhou, Chao Zhang, Lei Chen, Cai-Long Liu
OBJECTIVE: To study clinical effects of triad operation including reconstruction of medial patellofemoral ligament, release of lateral retinaculum, Fulkerson tibial tubercle osteotomy, medial transfer and advancement under arthroscopy for the treatment of habitual dislocation of patella. METHODS: From March 2010 to May 2016, 35 patients with habitual patellar dislocation were treated with the triad operation, including 14 males, 21 females, ranging in age from 18 to 38 years old, with an average of 25...
November 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29424164/-research-progress-on-the-etiology-and-treatment-of-patellofemoral-pain-syndrome
#8
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
#9
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
#10
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
#11
Antoine Moraux, Stefano Bianchi, Thomas Le Corroller
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-changes-femorotibial-kinematics-an-in-vitro-study
#12
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...
March 2018: 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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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