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Knee lateral retinaculum

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https://www.readbyqxmd.com/read/28602535/periarticular-injections-in-knee-and-hip-arthroplasty-where-and-what-to-inject
#1
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...
May 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28585993/a-modified-lateral-approach-for-total-knee-replacement-in-type-2-valgus-deformity
#2
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...
June 6, 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
#3
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
#4
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
#5
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
#6
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...
February 24, 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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/27357945/-patella-navigation-in-computer-assisted-tka-intraoperative-measurement-of-patellar-kinematics-video-article
#13
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
https://www.readbyqxmd.com/read/27354953/soft-tissue-loop-for-medial-patellofemoral-ligament-reconstruction
#14
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
https://www.readbyqxmd.com/read/27216144/total-knee-arthroplasty-using-trochlear-groove-as-guide-for-position-of-femoral-component-in-severe-knee-osteoarthritis
#15
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...
May 23, 2016: BMC Surgery
https://www.readbyqxmd.com/read/27125236/-causes-and-management-of-patellar-instability-after-total-knee-replacement-lateralization-subluxation-and-luxation
#16
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
https://www.readbyqxmd.com/read/27062838/-treatment-of-recurrent-patellar-dislocation-associated-with-old-osteochondral-fracture
#17
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
https://www.readbyqxmd.com/read/27058648/patellofemoral-instability-in-children-correlation-between-risk-factors-injury-patterns-and-severity-of-cartilage-damage
#18
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
https://www.readbyqxmd.com/read/26714326/-effects-of-femoral-tunnel-position-on-knee-function-after-medial-patellofemoral-ligament-reconstruction
#19
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
https://www.readbyqxmd.com/read/26709560/nonligamentous-soft-tissue-pathology-about-the-knee-a-review
#20
REVIEW
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
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