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Arch Bone Jt Surg 2022 Apr;10(4):339-346

Bone Joint and Related Tissues Research Center, Akhtar Orthopedic Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Background: This study aimed to report objective and subjective knee stability scores for patients who underwent acute repair of avulsed posterolateral corner (PLC) structures or acute reconstruction of midsubstance tears combined with delayed reconstruction of cruciate ligaments.

Methods: A total of 48 sport and vehicle accident traumatic patients were enrolled in a three-year follow-up study. The patients were investigated by clinical exams, subjective and objective International Knee Documentation Committee (IKDC) score, Tegner score, Lysholm score, and stress imaging. Read More

Cureus 2022 May 13;14(5):e24965. Epub 2022 May 13.

Orthopedic Surgery, Lake Erie College of Osteopathic Medicine, Bradenton, USA.

We present the case of a collegiate football player with an extensive bilateral ligamentous knee injury history to elucidate the mechanisms and possible explanations behind why some athletes sustain recurrent injuries. We hope to initiate thought on altering rehabilitation schedules for athletes who are at an increased risk of re-injury. A 21-year-old collegiate American football player presented with a re-tear of his left anterior cruciate ligament (ACL) and medial meniscus following reconstructive surgery. Read More

Orthop J Sports Med 2022 Jun 6;10(6):23259671221100216. Epub 2022 Jun 6.

Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.

Background: The contribution of anterior cruciate ligament (ACL) injury to lateral instability under varus stress, particularly compared with posterolateral structures, is not well known.

Purpose: To investigate the effect of sectioning the ACL and posterolateral knee structures on lateral compartment gapping under varus stress.

Study Design: Controlled laboratory study. Read More

JBJS Essent Surg Tech 2022 Jan-Mar;12(1). Epub 2022 Jan 7.

Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois.

Anatomic posterolateral corner (PLC) reconstruction is utilized for ligamentous knee instability associated with PLC injury in patients who desire a return to active lifestyles. The fibular collateral ligament (FCL) and popliteal tendon (PLT) are reconstructed in anatomic fashion according to techniques described by LaPrade et al.. Read More

JBJS Essent Surg Tech 2022 Jan-Mar;12(1). Epub 2022 Mar 21.

Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut.

Tenosynovial giant cell tumor (T-GCT) and pigmented villonodular synovitis (PVNS) are interchangeable terms for an uncommon benign proliferation of synovial tissue. Although neoplastic and inflammatory origins have been hypothesized, the etiology of this condition is unknown. There is controversy regarding surgical treatment, as the open and arthroscopic approaches to synovectomy have shown comparable reported outcomes in the literature. Read More

Scanning 2022 25;2022:7348978. Epub 2022 May 25.

College of Physical Education, Fuyang Normal University, Fuyang, Anhui 236037, China.

To study the effect of football injury on knee pain based on MRI image scanning, in this paper, a total of 31 knee injuries of 29 male professional football players from December 2012 to April 2015 were used as the experimental group. The players were 23.6 ± 3. Read More

J ISAKOS 2022 May 16. Epub 2022 May 16.

Lucile Packard Children's Hospital, Stanford University School of Medicine, 725 Welch Road, Palo Alto, CA 94304, USA. Electronic address:

Objectives: For iliotibial band (ITB) lateral extra-articular tenodesis or anterolateral ligamentous/capsular reconstruction with anterior cruciate ligament reconstruction, a clear understanding of the referenced anterolateral knee anatomy is critical-especially given the risk of injury to the physis or key anterolateral structures in the paediatric population, which is at high-risk for primary and secondary anterior cruciate ligament injury. The purpose of this study was to quantitatively assess the anatomy of the knee physes, paediatric lateral collateral ligament (LCL) origin, popliteus origin and ITB tibial insertion.

Methods: Nine paediatric cadaveric knee specimens with average age 4. Read More

BMC Musculoskelet Disord 2022 May 9;23(1):431. Epub 2022 May 9.

Department of Orthopedic and Trauma Surgery, Joint Reconstruction Research Center, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.

Background: Open knee fracture-dislocation is a rare orthopedic injury. However, the importance of its correct management could not be overstated. To the best of our knowledge, this is the fifth study reporting a case with simultaneous Hoffa fracture and knee dislocation and the 1 study describing a patient with open plateau fracture-dislocation accompanied with Hoffa fracture, patella fracture, and patellar tendon tear. Read More

BMC Musculoskelet Disord 2022 Apr 29;23(1):402. Epub 2022 Apr 29.

Department of Orthopaedic Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No.138, Sheng-Li Road, Tainan, Taiwan, 70428.

Purpose: To investigate the relationship between the lateral femoral notch sign as well as the coronal lateral collateral ligament (LCL) sign and anterior tibial translation using the GNRB arthrometer in patients with anterior cruciate ligament (ACL) injuries.

Methods: Forty-six patients with ACL injuries were retrospectively included from May 2020 to February 2022; four patients were excluded due to incomplete data. Magnetic resonance imaging (MRI) were reviewed for the lateral femoral notch sign and the coronal LCL sign. Read More

Orthopedics 2022 Apr 29:1-7. Epub 2022 Apr 29.

Intraoperative medial collateral ligament (MCL) injury during total knee arthroplasty (TKA) is a serious complication. External bracing and/or conversion to a constrained implant has previously been studied. The technique of using an internal high-strength suture brace to augment an MCL repair has been evaluated in the nonarthroplasty patient and could provide an alternate solution. Read More

Animals (Basel) 2022 Mar 22;12(7). Epub 2022 Mar 22.

Large Animal Teaching Hospital, Department of Medicine and Surgery, University of Copenhagen, 1165 Copenhagen, Denmark.

The popliteal tendon and muscle are major stabilizers of the human and dog knee, more specifically the postero-lateral corner. Injury to this complex causes posterior knee pain, and it is generally associated with other injured structures such as the lateral collateral ligament, lateral meniscus, and/or the cranial cruciate ligament. The popliteal complex is poorly reported in the horse, and its specific function has not been determined. Read More

Orthop J Sports Med 2022 Mar 24;10(3):23259671221085272. Epub 2022 Mar 24.

Department of Anatomy, Kansas City University, Kansas City, Missouri, USA.

Background: An iatrogenic injury to the infrapatellar branch of the saphenous nerve (IPBSN) is a common precipitant of postoperative knee pain and hypoesthesia.

Purpose: To locate potential safe zones for incision by observing the patterns and pathway of the IPBSN while examining the relationship of its location to sex, laterality, and leg length.

Study Design: Descriptive laboratory study. Read More

J Orthop Surg Res 2022 Mar 28;17(1):185. Epub 2022 Mar 28.

Department of Orthopeadics, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, No. 365 Renmin East Road, Jinhua City, 321000, Zhejiang Province, China.

Background: The posterolateral complex (PLC), which consists of the popliteus tendon (PT), lateral collateral ligament (LCL), and popliteofibular ligament (PFL), is an indispensable structure of the knee joint. The aim of this study was to explore the functionality of the PLC by determining the specific role of each component in maintaining posterolateral knee stability.

Methods: A finite element (FE) model was generated based on previous material property data and magnetic resonance imaging of a volunteer's knee joint. Read More

Arthrosc Tech 2022 Mar 18;11(3):e413-e417. Epub 2022 Feb 18.

Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Posterolateral corner (PLC) injuries represent a complex injury pattern whose repair is essential for varus and rotational stability of the knee. Several surgical techniques have been described for PLC injuries, which can be divided into 2 main groups: anatomical and nonanatomical. Due to insufficiency of posterior stabilization of nonanatomic procedure, LaPrade represented an anatomical reconstruction. Read More

Biomed Mater Eng 2022 Mar 1. Epub 2022 Mar 1.

Graduate School of Health Sciences, Niigata University, Niigata, Japan.

Background: Knowledge of the biomechanics of the normal collateral ligaments is important to secure optimal stability of the knee following injury. Various in vitro methods have been described in evaluating the biomechanics of these ligaments. However, a method of direct evaluation has not been reported. Read More

J Clin Orthop Trauma 2022 Apr 18;27:101807. Epub 2022 Feb 18.

Sports Injury and Arthroscopy Division, Orthopaedics, Kasturba medical college, Manipal, Manipal academy of Higher education, Manipal, India.

Traditionally, while managing ligament injuries around the knee, medial side injuries are frequently overlooked or considered '' with very little influence on overall knee stability outcomes. However, much has changed in the recent past, and like the lateral side of the knee, it is gaining considerable attention. It is now well known that the Medial collateral ligament and Posteromedial corner are fundamentally two distinct structures that differ in anatomy and biomechanics. Read More

Arch Orthop Trauma Surg 2022 Mar 1. Epub 2022 Mar 1.

School of Clinical Medicine, Tsinghua University, Beijing, China.

Introduction: The lateral femoral notch sign (LFNS) and the kissing contusion (KC) are two indirect signs of anterior cruciate ligament (ACL) injuries. They can be used to diagnose ACL injuries.

Materials And Methods: A total of 1000 patients were enrolled in this study, including 500 patients with ACL injuries who assigned to experimental group and 500 patients with meniscal tear (MT) who allocated to control group. Read More

Adv Orthop 2022 29;2022:1766401. Epub 2022 Jan 29.

Centro de Innovación, Clínica MEDS, Santiago, Chile.

Introduction: Traditional techniques can enlarge the medial tibiofemoral joint space width (JSW) for meniscal repairs, but a remnant ligament laxity may be developed. Alternatively, the debridement of the inner retinaculum layer may result in a balanced JSW without causing extra-ligament damage (retinaculum layers II and collateral ligament).

Purpose: The purpose of this study was to determine whether a concentric arthroscopic debridement of the inner retinaculum layer increases the tibiofemoral JSW in patients with meniscal injuries. Read More

JBJS Case Connect 2022 01 26;12(1). Epub 2022 Jan 26.

Department of Orthopaedic Surgery, University of Michigan Health-West, Wyoming, Michigan.

Case: A 13-year-old male American football player sustained an isolated grade III lateral collateral ligament (LCL) rupture and underwent direct repair with biceps femoris rotation graft augmentation after failure of nonoperative management. The procedure was performed without any complications or graft site morbidity and achieved complete functional resolution.

Conclusion: Isolated LCL injuries in the pediatric population are an extremely rare finding, with no evidence of rotation graft in the literature to date. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2022 Jan;36(1):25-32

Department of Sports Medicine, Beijing Jishuitan Hospital, Beijing, 100035, P. R. China.

Objective: To investigate the surgical technique and effectiveness of anatomical posterolateral complex (PLC) reconstruction in treating severe posterolateral knee instability using Y-shaped allogeneic Achilles tendon.

Methods: The clinical data of 12 patients with Fanelli type C chronic PLC injury with severe posterolateral knee instability who met the selection criteria between June 2013 and August 2017 were retrospectively analyzed. There were 9 males and 3 females, with a median age of 34. Read More

Trauma Case Rep 2022 Feb 23;37:100584. Epub 2021 Dec 23.

Investigation was performed at the USC Epstein Family Center for Sports Medicine at Keck Medicine of USC, United States of America.

This a case report of a 40-year-old male with left knee dislocation Type III and associated peroneal nerve palsy underwent delayed allograft reconstruction of his multiligament knee injury (MKI) with Internal Brace augmentation. The patient returned to work at 6 months postoperatively. He then fell and sustained a displaced supracondylar left femur fracture at the site of the internal brace augmentation of his lateral collateral ligament (LCL) reconstruction for which he underwent placement of a retrograde femoral nail. Read More

Appl Bionics Biomech 2022 6;2022:3057270. Epub 2022 Jan 6.

School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing, China 100083.

Introduction: We evaluated the velocity profiles of patients with lateral collateral ligament (LCL) injuries of the ankle with a goal of understanding the control mechanism involved in walking.

Methods: We tracked motions of patients' legs and feet in 30 gait cycles recorded from patients with LCL injuries of the ankle and compared them to 50 gait cycles taken from normal control subjects. Seventeen markers were placed on the foot following the Heidelberg foot measurement model. Read More

BMC Musculoskelet Disord 2022 Jan 13;23(1):43. Epub 2022 Jan 13.

Department of Spinal Orthopaedics, General Hospital of Ningxia Medical University, No. of 804, Shengli Street, Yinchuan, 750004, China.

Background: Magnetic resonance imaging (MRI) is widely used for the evaluation of knee injuries, however, the accuracy of MRI in classifying multiple ligament knee injuries (MLKIs) remains unknown. This study aimed to investigate the accuracy of MRI in diagnosing and classifying acute traumatic MLKIs, we hypothesize that MRI had high accuracy in detecting and classifying MLKIs.

Methods: The clinical data of 97 patients who were diagnosed with acute traumatic MLKIs and managed by multi-ligament reconstruction between 2012 and 2020 were retrospectively reviewed. Read More

Zhongguo Zhen Jiu 2022 Jan;42(1):59-65

Department of Needle-Knife Rehabilitation, Third Clinical Medical College of Anhui University of CM, Hefei 230031.

Objective: To observe the effect of needle knife on chondrocyte autophagy and expressions of autophagy-related protein and mammalian target of rapamycin (mTOR) in rats with knee osteoarthritis (KOA), and to explore the possible mechanism of needle knife for KOA.

Methods: A total of 42 SD rats were randomly divided into a normal group, a model group and a needle knife group, 14 rats in each group. Except for the normal group, the other two groups were injected with the mixture of papain and L-cysteine into the left hind knee joint to establish the KOA model. Read More

Acta Ortop Mex 2021 May-Jun;35(3):271-275

Clínica del Dolor Hospital Ángeles México. México.

Introduction: The medial collateral ligament (MCL) is one of the main stabilizers of the knee, but its injury occurs in conjunction with other ligaments.

Objective: To determine the prevalence of MCL lesions by magnetic resonance imaging, their degrees and associated lesions in our institution.

Material And Methods: Retrospective study from January to April 2018 where KNEE MRIs were evaluated where the MCL lesion was presented to evaluate the degree and type of associated injuries. Read More

Arthroscopy 2022 05 7;38(5):1664-1688.e1. Epub 2021 Dec 7.

Twin Cities Orthopedics, Edina, Minnesota, U.S.A.

Purpose: To obtain a comprehensive list of pathologies that cause increased anterior cruciate ligament (ACL) forces and pathologic knee kinematics to evaluate for in both primary and revision ACL reconstruction to decrease the risk of subsequent graft overload.

Methods: An electronic search was performed in the Embase and MEDLINE databases for the period between January 1, 1990, and December 10, 2020. All articles investigating medial and lateral meniscal injury, (postero)lateral corner injury, (postero)medial corner/medial collateral ligament injury, valgus alignment, varus alignment, and tibial slope in relation to ACL (graft) force and knee kinematics were included. Read More

Skeletal Radiol 2022 Jul 7;51(7):1381-1389. Epub 2021 Dec 7.

Mayo Clinic Alix School of Medicine, Rochester, MN, USA.

Objective: To assess MRI abnormalities of the medial patellofemoral ligament (MPFL) in patients with clinically and MRI-proven superficial medial collateral ligament (sMCL) injuries and determine the clinical significance.

Materials And Methods: High-field strength knee MRI examinations were selected which demonstrated sMCL injuries. These cases were retrospectively reviewed for the presence, location, and severity of MPFL abnormality. Read More

J Orthop Sports Phys Ther 2021 Dec 16;51(12):611-618. Epub 2021 Nov 16.

Objective: To describe the mechanisms, situational patterns, and biomechanics (kinematics) of medial collateral ligament (MCL) injuries in professional male soccer players.

Design: Case series.

Methods: Fifty-seven consecutive MCL injuries across 2 seasons of professional soccer matches were identified. Read More

IEEE Trans Biomed Eng 2022 05 21;69(5):1651-1662. Epub 2022 Apr 21.

Objective: The potential of electromagnetic knee imaging system verified on ex-vivo pig knee joint as an essential step before clinical trials is demonstrated. The system, which includes an antenna array of eight printed biconical elements operating at the band 0.7-2. Read More

Arthroscopy 2021 11;37(11):3344-3346

Rush University Medical Center.

Bone-patellar tendon-bone autograft for anterior cruciate ligament (ACL) reconstruction has the most data to support its use. However, there may still be room for improvement, and younger age, insufficient rehabilitation, altered neuromuscular patterns, and precocious return to play can increase risk of graft failure. High strength suture augmentation of soft-tissue repair or reconstruction has gained traction in a variety of applications for the knee, including medial collateral and posteromedial corner, lateral collateral ligament, posterior cruciate ligament, and ACL. Read More