155,112 results match your criteria Knee Anterior Cruciate Ligament Injuries MRI


Deficits in rate of torque development are accompanied by activation failure in patients with knee osteoarthritis.

J Electromyogr Kinesiol 2018 Dec 4;44:94-100. Epub 2018 Dec 4.

Human Performance Lab, Schulthess Clinic, Zurich, Switzerland. Electronic address:

Aim of this study was to investigate if knee extensor maximal voluntary contraction (MVC) torque and rate of torque development (RTD) deficits are accompanied by neuromuscular activation failure in patients with knee osteoarthritis (KOA). Nineteen patients with unilateral KOA completed gradual MVCs, from which MVC torque, voluntary activation and maximal EMG activity were recorded, and explosive MVCs, from which RTD and rate of EMG rise were recorded. For gradual MVCs, MVC torque (-28%), voluntary activation (-6%) and maximal EMG activity (-30%) were lower on the involved than on the uninvolved side (p < 0. Read More

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December 2018

Identification of knee gait waveform pattern alterations in individuals with patellofemoral pain using fast Fourier transform.

PLoS One 2018 14;13(12):e0209015. Epub 2018 Dec 14.

Division of Physical Therapy, College of Health Sciences, University of Kentucky, Lexington, KY, United States of America.

Patellofemoral pain (PFP) is one of the most common overuse injuries of the knee. Previous research has found that individuals with PFP exhibit differences in peak hip kinematics; however, differences in peak knee kinematics, where the pain originates, are difficult to elucidate. To better understand the mechanism behind PFP, we sought to characterize differences in knee gait kinematic waveform patterns in individuals with PFP compared to healthy individuals using fast Fourier transform (FFT). Read More

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December 2018

The popliteal angle tests in patients with cerebral palsy.

J Pediatr Orthop B 2018 Dec 13. Epub 2018 Dec 13.

Department of Pediatric Orthopedics and Traumatology, Poznań University of Medical Sciences.

The aims were to determine during the popliteal angle (PA) tests whether particular knee muscles are activated and whether the position of pelvis affects the level of muscles activation. Twenty-two patients with cerebral palsy were recruited (age: 14±4.94 years). Read More

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December 2018

Are Peripheral Nerve Blocks Indicated in Ambulatory Knee Surgery?

Anesth Analg 2019 Jan;128(1):3-4

From the Department of Anesthesiology and Pain Medicine, The Ottawa Hospital and University of Ottawa, Ottawa, Ontario, Canada.

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January 2019

Use of Opioid Analgesics in Patients with Chronic Low Back Pain and Knee Osteoarthritis.

Am J Phys Med Rehabil 2018 Dec 13. Epub 2018 Dec 13.

Department of Physical Medicine and Rehabilitation, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY.

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December 2018

[Knee osteotomies : a renaissance ?]

Rev Med Suisse 2018 Dec;14(631):2254-2258

Service d'orthopédie et de traumatologie de l'appareil locomoteur, Chirurgie du genou, Département de l'appareil locomoteur, CHUV, 1011 Lausanne.

There is a regain of interest for knee osteotomies over the last decade. A better knowledge of their long-term benefits and potential adverse events has increased their importance in the treatment of unicompartmental osteoarthritis. Emerging indications result from increasing evidence that the control of knee alignment is crucial in knee instability, meniscal transplantation and cartilage repair. Read More

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December 2018

[Management of infection associated with prosthetic arthroplasty : What's new ?]

Rev Med Suisse 2018 Dec;14(631):2248-2253

Service de chirurgie orthopédique et traumatologie de l'appareil moteur, HUG, 1211 Genève 14.

Total hip and knee arthroplasties are associated with a risk of infection ranging between 0.5 and 2 %, and pose a difficult diagnosis and prolonged treatment for the infected patient. The treatment must be multidisciplinary, consisting of orthopaedic surgeons, infectious diseases specialists, and radiologists, aiming at an accurate diagnosis and appropriate decisions, adapted to the clinical situation of the patient. Read More

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December 2018

[Robotic surgery : the future of prosthetic surgery ?]

Rev Med Suisse 2018 Dec;14(631):2238-2242

Service d'orthopédie et traumatologie de l'appareil moteur, HUG, 1211 Genève 14.

Indications for hip and knee replacement will continue to grow over the next few years. Robotic systems have been developed since the early 1990s in order to optimize implant positioning, to potentially improve clinical results, and to reduce perioperative morbidity. Currently, the different available systems certainly improve the accuracy and reproducibility of prosthetic components placement. Read More

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December 2018

[Leucocyte esterase as a reliable diagnostic, cost-effective and fast in knee infections].

Acta Ortop Mex 2018 Jul-Aug;32(4):198-202

Dirección de Educación e Investigación en Salud, Hospital de Traumatología. Unidad Médica de Alta Especialidad (UMAE). «Dr. Victorio de la Fuente Narváez», Instituto Mexicano del Seguro Social (IMSS). Ciudad de México. México.

Background: The articular infection represents a challenge due to its complexity and its devastating effect when not treated promptly. We have various diagnostic studies: cultures, ESR, CRP, count of leukocytes, among others but none is specific, it takes more than 30 minutes to complete and require complex infrastructure. In this study we determine the sensitivity and specificity of the leukocyte esterase for detection of an infectious process joint in Mexican population. Read More

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December 2018

Association of Asian mitochondrial DNA haplogroup B with new development of knee osteoarthritis in Koreans.

Int J Rheum Dis 2018 Dec 13. Epub 2018 Dec 13.

Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea.

Aim: The aim of this study was to determine which mitochondrial DNA (mtDNA) haplogroup is associated with new development of knee osteoarthritis (OA).

Methods: Epidemiologic data and knee radiographs with the Kellgren-Lawrence (K/L) score of the Ansung cohort study were prospectively obtained from the 2nd (2005-2006) and 6th follow-up periods (2013-2014). The mtDNA was analyzed by multiplex mutagenetically separated polymerase chain reaction to determine Asian mtDNA haplogroups (M, G, D, D4, D5, M7, M8, M9, M10, N, A, N9, R, F and B). Read More

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December 2018

NEUROMUSCULAR ELECTRICAL STIMULATION IN EARLY REHABILITATION OF GUILLAIN-BARRÉ SYNDROME: A PILOT STUDY.

Muscle Nerve 2018 Dec 13. Epub 2018 Dec 13.

Department of Neurology, Aarhus University Hospital, Aarhus, Denmark.

Introduction: In Guillain-Barré Syndrome (GBS), patients often develop muscle atrophy from denervation and immobilization. We therefore conducted a pilot study of neuromuscular electrical stimulation (NMES) to evaluate feasibility, safety, and effect on muscle wasting in the early phase of GBS.

Methods: Seventeen patients were randomized to receive 20 minutes of muscle fiber stimulation followed by 40 minutes of MNES of the right or left quadriceps muscle with the untreated side as control. Read More

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December 2018

New treatment method for mucopolysaccharidosis type VI by liver transplantation.

Pediatr Int 2018 Dec 13. Epub 2018 Dec 13.

Department of Clinical Diagnosis, National Center for Child Health and Development, Tokyo.

Background: Mucopolysaccharidosis (MPS) VI is a rare, autosomal recessive congenital metabolic disorder caused by deficient activity of the lysosomal metabolic enzyme, N-acetylgalactosamine 4-sulfatase. Enzyme replacement therapy (ERT) is current therapeutic treatment for MPS VI, while involves limited compliance to the therapy and high costs. This study aimed to develop a new method of treatment by conducting an orthotopic liver transplantation using an animal model of human MPS VI, and to evaluate and examine its effectiveness for treating MPS VI. Read More

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December 2018

Trabecular bone structure in the distal femur of humans, apes, and baboons.

Anat Rec (Hoboken) 2018 Dec 12. Epub 2018 Dec 12.

Department of Anthropology, Pennsylvania State University, University Park PA 16801.

Trabecular bone structure has been used to investigate the relationship between skeletal form and locomotor behavior on the premise that trabecular bone remodels in response to loading during an animal's lifetime. The aim of this study is to characterize human distal femoral trabecular bone structure in comparison to three non-human primate taxa and relate the patterns of trabecular structural variation in the distal femur to knee posture during habitual locomotor behavior. A whole-epiphysis approach was applied using microCT scans of the distal femora of extant Homo sapiens, Pan troglodytes, Pongo pygmaeus, and Papio spp. Read More

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December 2018

Incidence of osteonecrosis and insufficiency fracture of the hip and knee joints based on MRI in 300 renal transplant patients.

Hip Int 2018 Nov 1:1120700018808693. Epub 2018 Nov 1.

1 Department of Orthopaedic Surgery, Tokyo Women's Medical University, Tokyo, Japan.

Introduction:: The purpose of this study was to investigate the incidence of necrosis and insufficiency fracture of the hip and knee using magnetic resonance imaging (MRI) in renal transplant patients.

Methods:: We examined 300 consecutive renal transplant patients using MRI of the hips and knees (T1-weighted coronal MRI) preoperatively and at 3 and 6 months postoperatively. Oblique axial-plane T1-weighted MRI and short-tau inversion-recovery T2-weighted MRI were performed parallel to the femoral neck when distinguishing the osteonecrosis of the femoral head (ONFH) from subchondral insufficiency fracture (SIF) of the femoral head was difficult. Read More

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November 2018

EXPERIENCE WITH MANAGING COMPLICATED FRACTURES USING ILIZAROV PRINCIPLE IN LAGOS, NIGERIA.

J West Afr Coll Surg 2017 Jul-Sep;7(3):24-43

Lagos State University Teaching Hospital, Ikeja, Nigeria.

Background: Management of complicated bone fractures in our environment is very challenging. The Ilizarov principle has been found to be a viable management option worldwide, but the use of this method in our environment has been sparsely reported.

Aim: To document our use of Ilizarov method to manage patients with complicated long bone fractures and the outcome. Read More

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December 2018

A 9-months multidisciplinary rehabilitation protocol based on early post-operative mobilization following a chronic-degenerative patellar tendon rupture in a professional soccer player: a case report.

Eur J Phys Rehabil Med 2018 Dec 14. Epub 2018 Dec 14.

IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.

Background: Isolated patellar tendon rupture (PTR) is the final stage of a long-standing tendon chronic degeneration. PTR requires immediate repair in order to avoid important muscle retraction and tendon fibrosis. The aim was to describe the effects of a rehabilitation protocol after chronic-degenerative PTR on subjective functional outcomes, knee range of motion (ROM), size, and strength in a professional football player. Read More

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December 2018
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Utilizing Atlas-Based Modeling to Predict Knee Joint Cartilage Degeneration: Data from the Osteoarthritis Initiative.

Ann Biomed Eng 2018 Dec 13. Epub 2018 Dec 13.

Department of Applied Physics, University of Eastern Finland, POB 1627, 70211, Kuopio, Finland.

Currently, there are no clinically available tools or applications which could predict osteoarthritis development. Some computational models have been presented to simulate cartilage degeneration, but they are not clinically feasible due to time required to build subject-specific knee models. Therefore, the objective of this study was to develop a template-based modeling method for rapid prediction of knee joint cartilage degeneration. Read More

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December 2018
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Opening-wedge osteotomies of the distal femur: minor advantages for a biplanar compared to a uniplanar technique.

Knee Surg Sports Traumatol Arthrosc 2018 Dec 13. Epub 2018 Dec 13.

Institute of Biomechanics, Paracelsus Medical University Salzburg, Strubergasse 21, 5020, Salzburg, Austria.

Purpose: Valgus malalignment of the distal femur may be treated with corrective osteotomy. The purpose of this study was to compare the primary stability of a lateral opening-wedge osteotomy (LOWO) using a uniplanar compared to a biplanar technique. A study was carried out to test both surgeries, with both an intact medial cortex and with a deliberate attached cut of the medial cortex simulating a fracture. Read More

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December 2018

The use of bisphosphonates after joint arthroplasty is associated with lower implant revision rate.

Knee Surg Sports Traumatol Arthrosc 2018 Dec 13. Epub 2018 Dec 13.

Department of Orthopaedic Surgery, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea.

Purpose: This study hypothesized that the use of bisphosphonates (BPs) after total joint arthroplasty (TJA) is associated with a lower implant revision rate. This study aimed (1) to investigate the association between BP use and the revision rate of TJA and (2) to determine the relationship between the medication period and the revision rate of TJA.

Methods: National Health Insurance Service data on surgeries, medications, diagnoses, and screenings of 50 million Koreans were reviewed. Read More

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December 2018

Fulfillment of expectations influence patient satisfaction 5 years after total knee arthroplasty.

Knee Surg Sports Traumatol Arthrosc 2018 Dec 13. Epub 2018 Dec 13.

Department for Orthopaedic and Trauma Surgery, University Medicine Carl Gustav Carus, Fetscherstr. 74, 01307, Dresden, Germany.

Purpose: Constant efforts have been made to improve prosthesis design in total knee arthroplasty (TKA), but a significant number of patients remain dissatisfied postoperatively. Besides poor improvement in pain or function, poor fulfillment of patients expectations were identified as contributing factors. Purpose of the study was to assess fulfillment of patients' expectations and satisfaction with TKA 5 years after surgery. Read More

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December 2018
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Low dislocation rate of Saturne/Avantage dual-mobility THA after displaced femoral neck fracture: a cohort study of 966 hips with a minimum 1.6-year follow-up.

Arch Orthop Trauma Surg 2018 Dec 13. Epub 2018 Dec 13.

University Clinic for Hand, Hip and Knee Surgery, Hospital Unit West, Building 8, Entrance N, 1st floor, Laegaardvej 12, 7500, Holstebro, Denmark.

Introduction: Dislocation is a serious and common complication and a great concern with the use of total hip arthroplasty (THA) when treating displaced femoral neck fracture (FNF). Dual-mobility (DM) THA might reduce the dislocation risk. We aim to report the dislocation and revision rate of primary DM THA in patients with displaced FNF. Read More

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December 2018

An epidural steroid injection in the 6 months preceding a lumbar decompression without fusion predisposes patients to post-operative infections.

J Spine Surg 2018 Sep;4(3):529-533

Department of Orthopedic Surgery, University of Miami Hospital, Miami, FL, USA.

Background: To determine if the timing of a lumbar epidural steroid injection (LESI) effects rates of post-operative infection in patients receiving a non-fusion lumbar decompression (LDC) due to degenerative disc disease (DDD). Lumbar pain due to DDD can frequently be temporized or definitively treated with epidural injections. While there is ample literature regarding the infection risks associated with corticosteroid injections prior to hip/knee replacements, there are few studies relating to the spine. Read More

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September 2018
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Do Tibial Eminence Fractures and Anterior Cruciate Ligament Tears Have Similar Outcomes?

Orthop J Sports Med 2018 Dec 7;6(12):2325967118811854. Epub 2018 Dec 7.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.

Background: Avulsion fractures involving the tibial eminence are considered equivalent in terms of the cause to anterior cruciate ligament (ACL) tears; however, there are limited data comparing the outcomes of adolescent patients undergoing surgical fixation of a tibial eminence fracture (TEF) with those undergoing ACL reconstruction.

Purpose: To compare the clinical outcomes, subsequent ACL injury rates, and activity levels between adolescent patients who underwent TEF fixation with patients with midsubstance ACL tears who required acute reconstruction.

Study Design: Cohort study; Level of evidence, 3. Read More

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December 2018

Effects of Remnant Tissue Preservation on Tunnel Enlargement After Anatomic Double-Bundle Anterior Cruciate Ligament Reconstruction Using the Hamstring Tendon.

Orthop J Sports Med 2018 Dec 6;6(12):2325967118811293. Epub 2018 Dec 6.

Sports Medicine and Arthroscopy Center, Yagi Orthopaedic Hospital, Sapporo, Japan.

Background: The effects of remnant tissue preservation on tunnel enlargement after anatomic double-bundle anterior cruciate ligament (ACL) reconstruction have not yet been established.

Hypothesis: The preservation of ACL remnant tissue may significantly reduce the degree and incidence of tunnel enlargement after anatomic double-bundle ACL reconstruction, while the remnant-preserving procedure may not significantly increase the incidence of tunnel coalition after surgery.

Study Design: Cohort study; Level of evidence, 2. Read More

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December 2018

Intuitive Clinician Control Interface for a Powered Knee-Ankle Prosthesis: A Case Study.

IEEE J Transl Eng Health Med 2018 23;6:2600209. Epub 2018 Nov 23.

Department of BioengineeringThe University of Texas at DallasRichardsonTX75080USA.

This paper presents a potential solution to the challenge of configuring powered knee-ankle prostheses in a clinical setting. Typically, powered prostheses use impedance-based control schemes that contain several independent controllers which correspond to consecutive periods along the gait cycle. This control strategy has numerous control parameters and switching rules that are generally tuned by researchers or technicians and not by a certified prosthetist. Read More

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November 2018

Imbalance of M1/M2 macrophages is linked to severity level of knee osteoarthritis.

Exp Ther Med 2018 Dec 11;16(6):5009-5014. Epub 2018 Oct 11.

Department of Emergency Surgery, The Affiliated Qingdao Hiser Hospital of Qingdao University (Qingdao Hospital of Traditional Chinese Medicine), Qingdao, Shandong 266001, P.R. China.

Macrophages, whether M1 or M2 subtype, have been found to be implicated in the pathogenesis of osteoarthritis (OA). However, no study regarding the status of M1 and M2 macrophages has been reported in knee OA. To investigate the status of M1 and M2 macrophages in knee OA, synovial fluid as well as peripheral blood were collected from 80 patients with knee OA and 80 healthy controls. Read More

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December 2018
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Poor relationship between frontal tibiofemoral and trochlear anatomic parameters: Implications for designing a trochlea for kinematic alignment.

Knee 2018 Dec 10. Epub 2018 Dec 10.

MSK Lab, Imperial College London, Charing Cross Campus, Laboratory Block, London W6 8RP, United Kingdom of Great Britain and Northern Ireland; South West London Elective Orthopaedic Center, Dorking Rd, Epsom KT18 7EG, United Kingdom of Great Britain and Northern Ireland. Electronic address:

Background: The kinematic alignment (KA) technique for total knee arthroplasty (TKA) is an emerging implant positioning philosophy that aims to restore constitutional knee anatomy to improve knee kinematics. At present, the KA technique aims to reconstruct native femorotibial (FT) joint alignment, however there is still insufficient consideration towards the inter-individual trochlear anatomy variability. Poor trochlear restoration may compromise clinical outcomes. Read More

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December 2018

Is Operative Time a Predictor for Post-Operative Infection in Primary Total Knee Arthroplasty?

J Arthroplasty 2018 Nov 22. Epub 2018 Nov 22.

Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, OH.

Background: The purpose of this study is to identify factors affecting operative times and to evaluate the associations of operative times with prosthetic joint infections (PJIs) and surgical site infections (SSIs) in primary total knee arthroplasty.

Methods: A total of 11,840 primary total knee arthroplasties with a mean 2-year post-operative follow-up were studied. Operative times were analyzed both as categorical and continuous variables. Read More

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November 2018

Use of Closed Incisional Negative Pressure Wound Therapy After Revision Total Hip and Knee Arthroplasty in Patients at High Risk for Infection: A Prospective, Randomized Clinical Trial.

J Arthroplasty 2018 Nov 17. Epub 2018 Nov 17.

Department of Orthopaedic Surgery, Cleveland Clinic Florida, Weston, FL.

Background: Continuous wound drainage after arthroplasty can lead to the development of a periprosthetic joint infection. Closed incisional negative pressure wound therapy (ciNPWT) has been reported to help alleviate drainage and other wound complications. The purpose of this prospective randomized controlled trial is to compare the use of ciNPWT with our standard of care dressing in revision arthroplasty patients who were at high risk to develop wound complications. Read More

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November 2018

Revision Versus Primary Hospital Consumer Assessment of Healthcare Providers and Systems Scores in Total Joint Arthroplasty.

J Arthroplasty 2018 Nov 20. Epub 2018 Nov 20.

Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, NYU Langone Health, New York, NY.

Background: The Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) score is a nationally standardized measure of a patient's inpatient experience. This study aims to assess whether HCAHPS scores differ between patients undergoing primary total joint arthroplasty (TJA) and patients undergoing revision TJA.

Methods: Patients who underwent primary or revision total hip or total knee arthroplasty (THA or TKA) and returned a completed HCAHPS survey were included in this study. Read More

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November 2018

A specific protocol of autologous bone marrow concentrate and platelet products versus exercise therapy for symptomatic knee osteoarthritis: a randomized controlled trial with 2 year follow-up.

J Transl Med 2018 Dec 13;16(1):355. Epub 2018 Dec 13.

CAPHRI, School of Public Health and Primary Care, Maastricht University, Maastricht, Netherlands.

Background: Cell-based therapies have shown promise for the treatment of knee osteoarthritis (OA). The current study compared exercise therapy to autologous bone marrow concentrate (BMC) and platelet products for knee OA treatment.

Methods: Patients with symptomatic knee OA (N = 48) were randomized into either an exercise therapy control group or treatment group with injection of autologous BMC and platelet products. Read More

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December 2018

Platelet-Rich Plasma Versus Hyaluronic Acid Injections for the Treatment of Knee Osteoarthritis: Results at 5 Years of a Double-Blind, Randomized Controlled Trial.

Am J Sports Med 2018 Dec 13:363546518814532. Epub 2018 Dec 13.

Applied and Translational Research Center, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.

Background:: Platelet-rich plasma (PRP) injections have been proposed as a new conservative option for knee degeneration to provide symptomatic relief and delay surgical intervention. Although the current literature provides some evidence on the benefits of this technique compared with viscosupplementation, no studies have been performed to compare their long-term effects.

Purpose:: To compare the long-term clinical outcomes provided by intra-articular injections of either PRP or hyaluronic acid (HA) to treat knee degenerative disease. Read More

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December 2018

Spectrum-Effect Relationships between High-Performance Liquid Chromatography (HPLC) Fingerprints and the Antioxidant and Anti-Inflammatory Activities of Collagen Peptides.

Molecules 2018 Dec 10;23(12). Epub 2018 Dec 10.

College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.

A total of 13 batches of collagen peptide samples were extracted, isolated, and purified from chicken sternal cartilage under various process parameters. The fingerprint profiles of 13 batches of collagen peptides were established by high-performance liquid chromatography (HPLC). In addition, the amino acid profiles and molecular weight distributions of collagen peptides were investigated. Read More

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December 2018
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Systematic Analysis of Transcriptomic Profile of Chondrocytes in Osteoarthritic Knee Using Next-Generation Sequencing and Bioinformatics.

J Clin Med 2018 Dec 10;7(12). Epub 2018 Dec 10.

Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.

The phenotypic change of chondrocytes and the interplay between cartilage and subchondral bone in osteoarthritis (OA) has received much attention. Structural changes with nerve ingrowth and vascular penetration within OA cartilage may contribute to arthritic joint pain. The aim of this study was to identify differentially expressed genes and potential miRNA regulations in OA knee chondrocytes through next-generation sequencing and bioinformatics analysis. Read More

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December 2018

The efficacy of combined adductor canal block with local infiltration analgesia for pain control after total knee arthroplasty: A meta-analysis.

Medicine (Baltimore) 2018 Dec;97(49):e13326

Department of Anesthesiology, Huaihe Hospital, Henan University, Kaifeng, China.

Background: This meta-analysis aimed to evaluate the efficiency and safety of the combined adductor canal block (ACB) with local infiltration anesthesia (LIA) versus LIA alone for pain control after total knee arthroplasty (TKA).

Methods: We searched PubMed, Medline, Embase, Web of Science, the Cochrane Library and Google databases from inception to August 2017 to selected studies that comparing the combined ACB with LIA and LIA alone for pain control after TKA. Only randomized controlled trials (RCTs) were included. Read More

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December 2018
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Amniotic Tissue Modulation of Knee Pain-A Focus on Osteoarthritis.

J Knee Surg 2018 Dec 13. Epub 2018 Dec 13.

Cartilage Restoration Center, OrthoIndy Hospital, Greenwood, Indiana.

The use of intra-articular therapies as sources of growth factors, anti-inflammatory mediators, and medicinal signaling cells for osteoarthritis (OA) is rapidly evolving. Amnion, chorion, amniotic fluid, and the umbilical cord are distinct placental tissues that have been investigated for use in OA. Amniotic membrane (AM) synthesizes a variety of growth factors, cytokines, and vasoactive peptides that modulate inflammation. Read More

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December 2018

Empty Sunrise Sign: An Arthroscopic Finding in Recurrent Patellar Dislocation.

J Knee Surg 2018 Dec 13. Epub 2018 Dec 13.

Department of Orthopedic Surgery, Mount Carmel Health System, Columbus, Ohio.

Patellar dislocation is a relatively common knee injury and can be challenging to diagnose. We describe an arthroscopic finding we noted in recurrent patellar dislocation. Arthroscopic photos were evaluated from 50 knees with a history patellar dislocation and 100 control patients. Read More

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December 2018

Incidence and Risk Factors for Posterior Cruciate Ligament Avulsion during Cruciate Retaining Total Knee Arthroplasty.

J Knee Surg 2018 Dec 13. Epub 2018 Dec 13.

Department of Orthopaedic Surgery, New England Baptist Hospital, Boston, Massachusetts.

During cruciate retaining (CR) total knee arthroplasty (TKA), the posterior cruciate ligament (PCL) may avulse at its insertion. The incidence of PCL avulsion fracture has not been previously studied. The aim of this study is to report on the incidence and clinical significance of intraoperative PCL avulsion during primary CR TKA and to identify potential risk factors. Read More

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December 2018

Femoral Intramedullary Alignment in Total Knee Arthroplasty: Indications, Results, Pitfalls, Alternatives, and Controversies.

J Knee Surg 2018 Dec 13. Epub 2018 Dec 13.

Department of Orthopedic Surgery, New England Baptist Hospital, Boston, Massachusetts.

While femoral intramedullary alignment has been found to be the most accurate and reproducible method for proper femoral component orientation in total knee arthroplasty, certain situations preclude the use of intramedullary alignment, such as ipsilateral long-stem total hip arthroplasty, femoral shaft deformity (congenital or post-traumatic), capacious femoral canal, and retained hardware. These cases require alternative alignment guides, that is, extramedullary alignment. The purpose of this study was to determine the accuracy of intramedullary alignment in reproducing the femoral anatomic axis. Read More

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December 2018

Bone Marrow Aspirate Concentrate Does Not Improve Osseous Integration of Osteochondral Allografts for the Treatment of Chondral Defects in the Knee at 6 and 12 Months: A Comparative Magnetic Resonance Imaging Analysis.

Am J Sports Med 2018 Dec 13:363546518813915. Epub 2018 Dec 13.

Sports Medicine Service, Hospital for Special Surgery, New York, New York, USA.

Background:: Poor osseous integration after fresh osteochondral allograft transplantation (OCA) may be associated with graft subsidence and subchondral bone collapse after implantation. The augmentation of OCA with bone marrow aspirate concentrate (BMAC) has been hypothesized to improve osseous incorporation of the implanted allograft.

Purpose:: To evaluate the effect of autogenous BMAC treatment on osseous integration at the graft-host bony interface after OCA. Read More

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December 2018

Delayed myonuclear addition, myofiber hypertrophy and increases in strength with high-frequency low-load blood flow restricted training to volitional failure.

J Appl Physiol (1985) 2018 Dec 13. Epub 2018 Dec 13.

Department of Physical Performance, Norwegian School of Sport Sciences, Norway.

Purpose: To investigate muscle hypertrophy, strength, myonuclear and satellite cell (SC) responses to high-frequency blood flow restricted resistance exercise (BFRRE).

Methods: Thirteen individuals (24±2 years [mean ± SD], 9 males) completed two 5-day-blocks of 7 BFRRE sessions, separated by a 10-day rest period. Four sets of unilateral knee extensions to voluntary failure at 20% of 1RM were conducted with partial blood flow restriction (90-100 mmHg). Read More

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December 2018

Evaluation of Hybrid III and THOR-M neck kinetics and injury risk under various restraint conditions during full-scale frontal sled tests.

Traffic Inj Prev 2018 Dec 13:1-8. Epub 2018 Dec 13.

a Virginia Tech, Department of Biomedical Engineering and Mechanics , Center for Injury Biomechanics , Blacksburg , Virginia.

Objective: The objective of this research was to compare the kinetics and predicted injury risks of the Hybrid III (HIII) and Test device for Human Occupant Restraint (THOR)-M necks during full-scale frontal sled tests under 3 safety restraint conditions: knee bolster (KB), knee bolster and steering wheel airbag (KB/SWAB), and knee bolster airbag and steering wheel airbag (KBAB/SWAB).

Methods: Twelve sled tests were performed for the HIII and THOR-M, and 8 matched sled tests were performed using postmortem human surrogates (PMHSs). The tests were designed to match the 2012 Toyota Camry New Car Assessment Program (NCAP) full-scale crash test. Read More

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December 2018

Supervised physiotherapy leads to a better return to physical activity after anterior cruciate ligament reconstruction.

J Sports Med Phys Fitness 2018 Dec 13. Epub 2018 Dec 13.

Intensive Cardiac Therapy Clinic, Department of Invasive Cardiology and Electrocardiology, Medical University, Lodz, Poland.

Background: The main goal of rehabilitation after anterior cruciate ligament reconstruction (ACLR) is to return to functional and sports activity at a preinjury level. The aim of this study was to assess the influence of supervised (SU) versus non-supervised (NS) rehabilitation protocols after ACLR on the return to sports activity and quality of life of amateur athletes.

Methods: The study included a total of 50 patients after ACLR, with 25 in the SU group and 25 in the NS group. Read More

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December 2018

Efficacy and Safety of Massage for Osteoarthritis of the Knee: a Randomized Clinical Trial.

J Gen Intern Med 2018 Dec 12. Epub 2018 Dec 12.

Yale-Griffin Prevention Research Center, Griffin Hospital, Yale University School of Public Health, Derby, CT, USA.

Background: Current treatment options for knee osteoarthritis have limited effectiveness and potentially adverse side effects. Massage may offer a safe and effective complement to the management of knee osteoarthritis.

Objective: Examine effects of whole-body massage on knee osteoarthritis, compared to active control (light-touch) and usual care. Read More

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December 2018

Surgical management of patellofemoral instability. I. Imaging considerations.

Skeletal Radiol 2018 Dec 12. Epub 2018 Dec 12.

Department of Radiology, The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore, Middlesex, HA7 4LP, UK.

The patellofemoral joint is a complex joint that relies on both bone and soft tissues for its stability. Dysfunction of the patellofemoral joint, whether pain or instability, is a common cause of medial consultation. Thorough clinical and imaging assessment is important for managing these patients, who may require a combination of a bony and soft tissue surgical procedure. Read More

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December 2018

Cartilage repair surgery prevents progression of knee degeneration.

Knee Surg Sports Traumatol Arthrosc 2018 Dec 12. Epub 2018 Dec 12.

Musculoskeletal and Quantitative Imaging Research, Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry Street, Suite 350, San Francisco, CA, 94107, USA.

Purpose: To investigate, whether cartilage repair surgery for focal osteochondral defects at the knee results in less degenerative changes over 6 years in a MR imaging follow-up than morphologically initially identical defects in non-operated control subjects from the osteoarthritis initiative (OAI).

Methods: A total of 32 individuals received baseline and follow-up MRI. In n = 16 patients with cartilage repair [osteochondral autograft transfer system (OATS), n = 12; spongiosa-augmented matrix-associated autologous chondrocyte implantation (MACI), n = 4] MRI was performed preoperatively and after 5. Read More

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December 2018

Full recovery of hip muscle strength is not achieved at return to sports in patients with femoroacetabular impingement surgery.

Knee Surg Sports Traumatol Arthrosc 2018 Dec 12. Epub 2018 Dec 12.

Department of Sport Science at the Faculty of Social Sciences, Linnaeus University, 391 82, Kalmar, Sweden.

Purpose: The purpose of this study was to study dynamic hip  external rotation strength in patients with Femoroacetabular impingement surgery (FAI) syndrome who have undergone unilateral arthroscopic treatment and returned to sports.

Methods: A cross-sectional study was performed using an observational group (n = 22) and a matched control group (n = 22). Dynamic external rotation strength of the hip was measured using the Augustsson Strength Test, which has shown high reliability for examining side-to-side differences in hip muscle strength. Read More

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December 2018

Patients' expectations of osteotomies around the knee are high regarding activities of daily living.

Knee Surg Sports Traumatol Arthrosc 2018 Dec 12. Epub 2018 Dec 12.

Berufsgenossenschaftliche Unfallklinik Murnau, Murnau, Germany.

Purpose: This study was conducted to investigate patients' expectations on high tibial osteotomies, distal femur osteotomies, and double-level osteotomies in different health-related domains. It was hypothesized that expectations are high in terms of capacity to work, pain relief, and restoring knee function.

Methods: A total of 264 patients (age 47 years ± 11 years) were enrolled in this study from March 2015 until May 2016 in seven specialized orthopaedic surgery departments. Read More

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December 2018

Single-Incision Double-Plating Approach in the Management of Isolated, Closed Osteoporotic Distal Femoral Fractures.

Geriatr Orthop Surg Rehabil 2018 11;9:2151459318799856. Epub 2018 Nov 11.

Ain-Shams University, Cairo, Egypt.

Introduction: Distal femoral fractures in elderly population had recorded an increase in incidence in the last 2 decades. Lateral distal femoral locking plating is considered one of the best options especially when dealing with comminuted fractures but varus collapse of the medial femoral condyle occurs frequently in patients with osteoporosis. Anatomical reduction of the fracture with stable rigid fixation using double-plating approach allows early mobilization of geriatric population and prevents varus collapse minimizing the comorbidities in such fractures. Read More

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November 2018