37,945 results match your criteria ligament injury


IMU-based knee flexion, abduction and internal rotation estimation during drop landing and cutting tasks.

J Biomech 2021 Jun 13;124:110549. Epub 2021 Jun 13.

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China. Electronic address:

Anterior cruciate ligament (ACL) injury is a common and severe knee injury in sports. Knee flexion, abduction and internal rotation angles are considered crucial biomechanical indicators of the ACL injury risk but currently are computed in a laboratory with an optical motion capture. This paper introduces an inertial measurement unit (IMU) based algorithm for knee flexion, abduction and internal rotation estimation during ACL injury risk assessment tests, including drop landing and cutting tasks. Read More

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Validity of Research Based on Public Data in Sports Medicine: A Quantitative Assessment of Anterior Cruciate Ligament Injuries in the National Football League.

Am J Sports Med 2021 Jun 24:3635465211015435. Epub 2021 Jun 24.

Department of Orthopaedic Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA.

Background: Numerous researchers have leveraged publicly available Internet sources to publish publicly obtained data (POD) studies concerning various orthopaedic injuries in National Football League (NFL) players.

Purpose: To provide a comprehensive systematic review of all POD studies regarding musculoskeletal injuries in NFL athletes and to use anterior cruciate ligament (ACL) injuries in NFL players to quantify the percentage of injuries identified by these studies.

Study Design: Systematic review; Level of evidence, 4. Read More

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The Segond's fracture and the anterolateral ligament.

J Anat 2021 Jun 23. Epub 2021 Jun 23.

Orthopaedic Unit and Kirk Kilgour Sports Injury Centre, S. Andrea Hospital, University of Rome Sapienza, Rome, Italy.

The study of Mullins et al. reasonably explains how the Segond's fracture is probably the most frequent avulsion fracture of the tibia plateau, but it does not challenge the hypothesis of the existence of a discrete ligament (the ALL) strong enough to sometimes pull out its bony insertion as a result of a forced internal rotation and of an ACL failure. Read More

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First splenic rupture following an endoscopic esophageal myotomy: A case report.

World J Gastrointest Endosc 2021 Jun;13(6):184-188

Department of General Surgery, Charles-LeMoyne Hospital, Greenfield Park J4V2H1, Quebec, Canada.

Background: The occurrence of splenic rupture is extremely rare during an upper gastro-intestinal endoscopy. Although infrequent, splenic rupture is a known complication secondary to colonoscopy. However, occurrence of splenic rupture after peroral endoscopic myotomy (POEM) has never been reported to date. Read More

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Management for traumatic hepatic injury diagnosed by contrast-enhanced ultrasonography in a patient with an occluded coeliac axis: a case report.

J Int Med Res 2021 Jun;49(6):3000605211019926

Department of Radiology, Chungbuk National University Hospital, Cheongju, South Korea.

Transcatheter arterial embolization (TAE) is the standard of care for haemodynamically-stable patients with blunt hepatic injury but it is sometimes impossible due to unfavourable vascular anatomies. This case report describes a 43-year-old male patient with abdominal pain following a motorcycle accident. Based on computed tomography (CT) findings, he was diagnosed with high-grade hepatic injury with coeliac axis stenosis (CAS) due to compression by the median arcuate ligament, and an aberrant right hepatic artery. Read More

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What Is the Failure Rate After Arthroscopic Repair of Bucket-Handle Meniscal Tears? A Systematic Review and Meta-analysis.

Am J Sports Med 2021 Jun 23:3635465211015425. Epub 2021 Jun 23.

Orthopaedic and Traumatologic Unit, Umberto I Hospital, Azienda Sanitaria Provinciale di Enna, Enna, Italy.

Background: Meniscal repair has become the treatment of choice for meniscal tears, especially in the subset of bucket-handle meniscal tears (BHMTs). However, a comprehensive estimate of the corresponding failure rate is not available, thus maintaining doubts about the healing potential of these tears. Furthermore, a wide range of factors to predict high failure rates have been reported but with conflicting evidence. Read More

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Sequential Changes in Posterior Tibial Translation After Posterior Cruciate Ligament Reconstruction: Risk Factors for Residual Posterior Sagging.

Orthop J Sports Med 2021 Jun 4;9(6):23259671211009805. Epub 2021 Jun 4.

Faculty of Comprehensive Rehabilitation, Osaka Prefecture University, Habikino, Japan.

Background: Residual posterior sagging may occur after posterior cruciate ligament (PCL) reconstruction (PCLR), yet when it mainly occurs is not fully understood.

Purpose: To elucidate sequential changes in radiographic posterior tibial translation (PTT) after PCLR.

Study Design: Case-control study; Level of evidence, 3. Read More

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Whether sutures reduce the graft laceration caused by interference screw in anterior cruciate ligament reconstruction? A biomechanical study in vitro.

BMC Musculoskelet Disord 2021 Jun 22;22(1):571. Epub 2021 Jun 22.

Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou University, No. 82 Cuiyingmen, Chengguan District, 730030, Lanzhou City, Gansu Province, People's Republic of China.

Background: Interference screw is commonly used for graft fixation in anterior cruciate ligament (ACL) reconstruction. However, previous studies had reported that the insertion of interference screws significantly caused graft laceration. The purposes of this study were to (1) quantitatively evaluate the graft laceration from one single insertion of PEEK interference screws; and (2) determine whether different types of sutures reduced the graft laceration after one single insertion of interference screws in ACL reconstruction. Read More

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Psychosocial factors 3-months after anterior cruciate ligament reconstruction predict 6-month subjective and objective knee outcomes.

J Orthop Res 2021 Jun 22. Epub 2021 Jun 22.

Department of Physical Therapy, College of Health Sciences, University of Kentucky, Lexington, Kentucky, USA.

The objective of the study was to determine if psychological readiness for sport and knee self-efficacy assessed early (3 months) after anterior cruciate ligament reconstruction (ACLR) are predictive of self-reported functional outcomes, quadriceps strength, and knee mechanics while running at the time of return to sport training (6 months). Thirty athletes with unilateral ACLR completed the ACL Return to Sport after Injury (ACL-RSI) and Knee Self-Efficacy Scale (K-SES) 3 months after ACLR and completed self-reported functional outcomes, isometric quadriceps strength testing, and three-dimensional running gait analysis 6 months after ACLR. The 3-month ACL-RSI significantly correlated with the 6-month International Knee Documentation Committee (IKDC; r = 0. Read More

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ACL Reconstruction Delay in Pediatric and Adolescent Patients Is Associated with a Progressive Increased Risk of Medial Meniscal Tears.

J Bone Joint Surg Am 2021 Jun 22. Epub 2021 Jun 22.

Rainbow Babies and Children's Hospital, Case Western Reserve University School of Medicine, Cleveland, Ohio.

Background: We sought to investigate the relationship between the time from an anterior cruciate ligament (ACL) tear to the surgical procedure and meniscal tears in the pediatric and adolescent population.

Methods: Patients who were ≤18 years of age and had undergone an ACL reconstruction from 2006 to 2018 were identified in a retrospective, multicenter cohort. The primary outcomes were arthroscopically confirmed medial meniscal or lateral meniscal tears specifically and, in general, if any meniscal tear was present (medial and/or lateral). Read More

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Treatment of unstable distal clavicle fractures (Neer type IIb): a modified system using a miniature locking plate with a single button.

J Int Med Res 2021 Jun;49(6):3000605211022505

Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.

Distal clavicle fractures are common in patients with shoulder injuries. We retrospectively evaluated the clinical outcomes of a novel fixation technique using a miniature locking plate with a single button in patients with distal clavicle fractures associated with coracoclavicular ligament disruption. The study involved seven patients with distal clavicle fractures with a follow-up period of 12 months. Read More

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Weak Hip Strength Increases Dynamic Knee Valgus in Single-Leg Tasks of Collegiate Female Athletes.

J Sport Rehabil 2021 Jun 20:1-4. Epub 2021 Jun 20.

Clinical Scenario: Dynamic knee valgus (DKV) is a mechanical alteration in the knee that leads to increased risk of injury. Weakness of hip musculature in hip abduction (HABD), extension (HEXT), and external rotation (HER) may contribute to increased DKV in single-leg landing tasks. Focused Clinical Question: Is decreased hip strength associated with an increase in DKV during a single-leg landing task in collegiate female athletes? Summary of Key Findings: Three studies were included: One randomized control trial (RCT), one cohort study, and one case-control. Read More

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Integrating neurocognitive challenges into injury prevention training: A clinical commentary.

Phys Ther Sport 2021 May 19;51:8-16. Epub 2021 May 19.

Ohio Musculoskeletal & Neurological Institute, Ohio University, Athens, OH, USA; Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens, OH, USA; Division of Physical Therapy, School of Rehabilitation & Communication Sciences, College of Health Sciences and Professions, Ohio University, Athens, OH, USA. Electronic address:

Despite the efforts of many traditional lower extremity injury prevention programs (IPP), the incidence of anterior cruciate ligament injuries in young athletes continues to rise. Current best practices for IPPs include training lower extremity neuromuscular control and movement quality during cutting, jumping, and pivoting. Emerging evidence indicates neurocognition may contribute to injury incidence and injury risk biomechanics. Read More

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Resolvin E1 and Cytokines Environment in Skeletally Immature and Adult ACL Tears.

Front Med (Lausanne) 2021 2;8:610866. Epub 2021 Jun 2.

Orthopedic Department, San Gerardo Hospital, Monza, Italy.

The intra-articular synovial fluid environment in skeletally immature patients following an ACL tear is complex and remains undefined. Levels of inflammatory and anti-inflammatory cytokines change significantly in response to trauma and collectively define the inflammatory environment. Of these factors the resolvins, with their inherent anti-inflammatory, reparative, and analgesic properties, have become prominent. Read More

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Ramp lesion of the medial meniscus.

EFORT Open Rev 2021 May 4;6(5):372-379. Epub 2021 May 4.

Department of Orthopaedics, the Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China.

Ramp lesion of the medial meniscus used to be completely disregarded in the past.Ramp lesion has been now put under the spotlight by orthopaedic and sport medicine surgeons and requires attention.It is closely associated with anterior cruciate ligament injury. Read More

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Posterior oblique ligament of the knee: state of the art.

EFORT Open Rev 2021 May 4;6(5):364-371. Epub 2021 May 4.

Department of Orthopaedic Surgery, Faculty of Medicine, University of Thessalia, University Hospital of Larissa, Larissa, Greece.

The posterior oblique ligament (POL) is the predominant ligamentous structure on the posterior medial corner of the knee joint. A thorough understanding of the anatomy, biomechanics, diagnosis, treatment and rehabilitation of POL injuries will aid orthopaedic surgeons in the management of these injuries.The resulting rotational instability, in addition to valgus laxity, may not be tolerated by athletes participating in pivoting sports. Read More

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Cueing Changes in Peak Vertical Ground Reaction Force to Improve Coordination Dynamics in Walking.

J Mot Behav 2021 Jun 20:1-10. Epub 2021 Jun 20.

Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.

AbstractsBiofeedback has been effectively implemented to improve the mediation and distribution of joint loads during gait, however, the inability to effectively coordinate lower limb movement by altering loading patterns may increase pathological stress and risk of injury and deleterious joint changes. This study examined the influence cueing an increase or decrease in lower extremity loading has on inter- and intralimb joint coordination during gait, applied herein for 12 persons following anterior cruciate ligament reconstruction across three loading conditions (control, high, and low). Visual biofeedback was presented on a screen via a force-measuring treadmill with targeted changes prescribed based on stride-to-stride peak vertical ground reaction forces bilaterally. Read More

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The popliteofibular ligament: a cadaveric ultrasound study.

Skeletal Radiol 2021 Jun 19. Epub 2021 Jun 19.

Department of Orthopedics and Trauma Medical, University of Łódź, Veteran's Memorial Hospital, Łódź, Poland.

Objective: The popliteofibular ligament (PFL) is an important stabilizer of the knee found within the posterolateral corner (PLC) of the joint. Injuries to the PLC can cause substantial patient morbidity. Accurate PFL visualization has been historically challenging, impeding injury diagnosis and treatment. Read More

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Mid-term evaluation of clinical and functional outcomes after arthroscopic medial longitudinal and bucket-handle meniscus repair.

Jt Dis Relat Surg 2021 11;32(2):363-370. Epub 2021 Jun 11.

Vital Hastanesi Ortopedi ve Travmatoloji Bölümü, 34180 Bahçelievler, İstanbul, Türkiye.

Objectives: The aim of this study was to evaluate clinical and functional outcomes following the arthroscopic medial meniscal repair.

Patients And Methods: A total of 50 patients (42 males, 8 females; mean age: 32.9±7. Read More

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Can the body slope of interference screw affect initial stability of reconstructed anterior cruciate ligament?: An in-vitro investigation.

BMC Musculoskelet Disord 2021 Jun 18;22(1):556. Epub 2021 Jun 18.

Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.

Background: Superior biomechanical performance of tapered interference screws, compared with non-tapered screws, with reference to the anterior cruciate ligament (ACL) reconstruction process, has been reported in the literature. However, the effect of tapered interference screw's body slope on the initial stability of ACL is poorly understood. Thus, the main goal of this study was to investigate the effect of the interference screw's body slope on the initial stability of the reconstructed ACL. Read More

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Association Between Knee Alignment and Meniscal Tear in Pediatric Patients with Anterior Cruciate Ligament Injury.

J Bone Joint Surg Am 2021 Jun 18. Epub 2021 Jun 18.

Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Background: The present study aimed to evaluate the association between elapsed time from anterior cruciate ligament (ACL) injury to surgical treatment and the incidence of meniscal tears in a cohort of patients ≤16 years old with varus-aligned and non-varus-aligned knees.

Methods: The study cohort included 123 patients ≤16 years old who underwent primary ACL reconstruction between January 2016 and March 2020. Knee alignment was expressed as the hip-knee-ankle angle (HKAA), as measured preoperatively on an anteroposterior view of 3-dimensional computed tomography of the full length of the lower limb. Read More

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Leptin attenuates hypoxia-induced apoptosis in human periodontal ligament cells via the reactive oxygen species/hypoxia-inducible factor-1α pathway.

Exp Physiol 2021 Jun 18. Epub 2021 Jun 18.

State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.

New Findings: What is the central question of this study? Whether leptin takes an effect on hypoxia-induced apoptosis in hPDLCs, and what's the potential underlying mechanism? What is the main finding and its importance? Hypoxia induces cell apoptosis and leptin expression in hPDLCs through the induction of HIF-1α and ROS accumulation. Leptin shows feedback inhibition on hypoxia-induced ROS-mediated apoptosis in hPDLCs, suggesting a novel application of leptin for hypoxic damage in periodontal diseases.

Abstract: Hypoxia-induced apoptosis of human periodontal ligament cells (hPDLCs) is an important contributor to the progression of various periodontal diseases. Read More

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[Correlation between graft maturity and knee function after anterior cruciate ligament reconstruction].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2021 Jun;35(6):704-709

Department of Sports Medicine, Affiliated Zhongshan Hospital of Dalian University, Dalian Liaoning, 116001, P.R.China.

Objective: To investigate the correlation between graft maturity and knee function after anterior cruciate ligament (ACL) reconstruction.

Methods: A total of 50 patients who underwent ACL reconstruction with autologous tendons between August 2016 and August 2018 were included in the study. There were 28 males and 22 females, with an average age of 31. Read More

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[Influence of lateral posterior tibial slope on tibial tunnel expansion after anatomical single-bundle anterior cruciate ligament reconstruction].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2021 Jun;35(6):697-703

Department of Sports Medicine, Affiliated Xinhuan Hospital of Dalian University, Dalian Liaoning, 116001, P.R.China.

Objective: To investigate the influence of lateral posterior tibial slope (LPTS) on tibial tunnel expansion after anatomical single-bundle anterior cruciate ligament (ACL) reconstruction and the effect of tibial tunnel expansion on knee joint function.

Methods: A clinical data of 52 patients with ACL rupture, who underwent arthroscopic anatomical single-bundle reconstruction between November 2018 and December 2019, was retrospectively analyzed. There were 32 males and 20 females with an average age of 34. Read More

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MRI evaluation of the peripheral attachments of the lateral meniscal body: the menisco-tibio-popliteus-fibular complex.

Knee Surg Sports Traumatol Arthrosc 2021 Jun 17. Epub 2021 Jun 17.

Knee and Arthroscopy Unit, ICATME, Hospital Universitari Dexeus, Universitat Autonoma de Barcelona (U.A.B.), Barcelona, Catalunya, Spain.

Purpose: To determine, identify and measure the structures of the menisco-tibio-popliteus-fibular complex (MTPFC) with magnetic resonance imaging (MRI) in knees without structural abnormalities or a history of knee surgery.

Methods: One-hundred-and-five knees without prior injury or antecedent surgery were analyzed by means of MRI. The average age was 50. Read More

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Prominent Resident's Ridge as a Potential Cause of Anterior Cruciate Ligament Impingement: A Case Report.

J Orthop Case Rep 2021 Feb;11(2):49-51

Department of Orthopaedics, Postgraduate Institute of Medical Education and Research, Chandigarh. India.

Background: The resident's ridge is an arthroscopic landmark that is consistent with the anterior border of the anterior cruciate ligament (ACL) femoral attachment. The identification of the landmark allows for accurate graft placement.

Case Report: We report a case of a 30-year athletic individual with an ACL-deficient knee, who had an abnormally large resident's ridge, abutting the midsubstance of the torn ACL; the residual femoral attachment was behind the ridge. Read More

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February 2021

Heterotopic Ossification after Knee Surgery, Arthroscopy is Not an Exception!!!!

J Orthop Case Rep 2021 Feb;11(2):41-44

Department of General Medicine , Narayana Medical College, Nellore, Andhra Pradesh,India.

Introduction: Reconstruction of the anterior cruciate ligament (ACL) is a common procedure. Injury is the predisposing risk factor for developing heterotopic ossification(HO). We like to report a case of HO of the knee following arthroscopic ACL reconstruction. Read More

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February 2021

Characteristics of landing impact in athletes who have not returned to sports at the pre-injury competition level after anterior cruciate ligament reconstruction.

Asia Pac J Sports Med Arthrosc Rehabil Technol 2021 Jul 4;25:47-52. Epub 2021 Jun 4.

Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.

Background: Most patients with anterior cruciate ligament (ACL) injury undergo ACL reconstruction (ACLR) with the expectation of being able to return to sport (RTS) at the same level of the competition as before the injury. The magnitude and asymmetry of landing impact are important post-ACLR functional variables related to increased ACL strain and poor athletic performance. However, the association between the RTS status and landing impact in post-ACLR patients is unknown. Read More

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Quick and simple test to evaluate severity of acute lateral ankle sprain.

Asia Pac J Sports Med Arthrosc Rehabil Technol 2021 Jul 30;25:30-34. Epub 2021 May 30.

Fujita Orthopedic & Sports Clinic, Japan.

Background/objective: For early return to sports after a lateral ankle sprain (LAS) and recurrence prevention, effective rehabilitation and gradual return to sports should be initiated while predicting the return time based on the appropriate severity evaluation immediately after injury. However, since severity evaluations performed in previous studies required large space and stairs and involved high-revel activity, their use as a test and index to evaluate severity after LAS was not appropriate considering convenience and risk of re-injury. Therefore, a quick and simple test was developed to evaluate the severity of acute LAS. Read More

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Arthroscopic-Assisted Inside-Out Foveal Reattachment of Triangular Fibrocartilage Complex.

Arthrosc Tech 2021 May 18;10(5):e1333-e1338. Epub 2021 Apr 18.

Department of Orthopaedics, Faculty of Medicine, Thammasat University, Pathumthani, Thailand.

The dorsal and palmar radioulnar ligaments are the deep components of the triangular fibrocartilage complex (TFCC), which provides stability to the distal radioulnar joint (DRUJ). In patients with DRUJ instability, arthroscopic procedures are currently focused on reattachment of the deep components of the TFCC to the fovea of the ulnar head. TFCC-foveal reattachment can be performed either by using the transosseous technique with creation of a bone tunnel or by suturing to a bone anchor. Read More

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