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    7998 results match your criteria American Journal of Sports Medicine[Journal]

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    Time Trends in Concussion Symptom Presentation and Assessment Methods in High School Athletes.
    Am J Sports Med 2017 Sep 1:363546517725068. Epub 2017 Sep 1.
    Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
    Background: Concussion rates have increased significantly over the past decade. This may reflect an increase in the knowledge and diagnosis of the symptoms of a concussion rather than a true increase in the incidence. Assessing trends in the way that concussions are presenting to and being identified by clinicians over the same period may provide additional insight into the apparent rise in concussions. Read More

    High Degree of Variability in Reporting of Clinical and Patient-Reported Outcomes After Hip Arthroscopy.
    Am J Sports Med 2017 Sep 1:363546517724743. Epub 2017 Sep 1.
    Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA.
    Background: Hip arthroscopy for the treatment of intra-articular pathology is a rapidly expanding field. Outcome measures should be reported to document the efficacy of arthroscopic procedures; however, the most effective outcome measures are not established.

    Purpose: To evaluate the variability in outcomes reported after hip arthroscopy and to compare the responsiveness of patient-reported outcome (PRO) instruments. Read More

    Over-the-top ACL Reconstruction Plus Extra-articular Lateral Tenodesis With Hamstring Tendon Grafts: Prospective Evaluation With 20-Year Minimum Follow-up.
    Am J Sports Med 2017 Sep 1:363546517723013. Epub 2017 Sep 1.
    II Clinica Ortopedica e Traumatologica, Istituto Ortopedico Rizzoli, University of Bologna, Bologna, Italy.
    Background: There are few published studies with very long-term follow-up of combined intra- and extra-articular anterior cruciate ligament (ACL) reconstruction.

    Purpose: To analyze clinical and radiographic outcomes of over-the-top ACL reconstruction plus extra-articular lateral tenodesis with autologous hamstrings at minimum 20-year follow-up.

    Study Design: Case series; Level of evidence, 4. Read More

    Characterizing Verified Head Impacts in High School Girls' Lacrosse.
    Am J Sports Med 2017 Sep 1:363546517724754. Epub 2017 Sep 1.
    Sports Medicine Assessment Research & Testing (SMART) Laboratory, George Mason University, Manassas, Virginia, USA.
    Background: Girls' high school lacrosse players have higher rates of head and facial injuries than boys. Research indicates that these injuries are caused by stick, player, and ball contacts. Yet, no studies have characterized head impacts in girls' high school lacrosse. Read More

    A Comparison of 2-Year Outcomes in Patients Undergoing Tibiofemoral or Patellofemoral Matrix-Induced Autologous Chondrocyte Implantation.
    Am J Sports Med 2017 Sep 1:363546517724761. Epub 2017 Sep 1.
    Perth Orthopaedic and Sports Medicine Centre, West Perth, Western Australia, Australia.
    Background: Matrix-induced autologous chondrocyte implantation (MACI) has demonstrated encouraging clinical results in the treatment of knee chondral defects. However, earlier studies suggested that chondrocyte implantation in the patellofemoral (PF) joint was less effective than in the tibiofemoral (TF) joint.

    Purpose: To compare the radiological and clinical outcomes of those undergoing MACI to either the femoral condyles or PF joint. Read More

    Effect of Preoperative Fatty Degeneration of the Rotator Cuff Muscles on the Clinical Outcome of Patients With Intact Tendons After Arthroscopic Rotator Cuff Repair of Large/Massive Cuff Tears.
    Am J Sports Med 2017 Sep 1:363546517724432. Epub 2017 Sep 1.
    Department of Orthopaedic Surgery, Kurume University School of Medicine, Kurume, Fukuoka, Japan.
    Background: Fatty degeneration of the rotator cuff muscles is associated not only with postoperative retear but also with postoperative muscle weakness; therefore, fatty changes in the muscles may affect the clinical outcome even in patients with these tears who have intact tendons after arthroscopic rotator cuff repair (ARCR).

    Purpose: To evaluate the effect of fatty infiltration on the clinical outcome in patients with intact tendons after arthroscopic repair of large/massive cuff tears.

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

    In Vitro Chondrotoxicity of Nonsteroidal Anti-inflammatory Drugs and Opioid Medications.
    Am J Sports Med 2017 Sep 1:363546517724423. Epub 2017 Sep 1.
    Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, California, USA.
    Background: A variety of medications are administered to the intra-articular space for the relief of joint pain. While amide-type local anesthetics have been extensively studied, there is minimal information regarding the potential chondrotoxicity of nonsteroidal anti-inflammatory drugs (NSAIDs) and opioid medications.

    Purpose: To investigate the in vitro chondrotoxicity of single-dose equivalent concentrations of ketorolac, morphine, meperidine, and fentanyl on human chondrocytes. Read More

    Effect of Loading on In Vivo Tibiofemoral and Patellofemoral Kinematics of Healthy and ACL-Reconstructed Knees.
    Am J Sports Med 2017 Sep 1:363546517724417. Epub 2017 Sep 1.
    Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA.
    Background: Although knees that have undergone anterior cruciate ligament reconstruction (ACLR) often exhibit normal laxity on clinical examination, abnormal kinematic patterns have been observed when the joint is dynamically loaded during whole body activity. This study investigated whether abnormal knee kinematics arise with loading under isolated dynamic movements.

    Hypothesis: Tibiofemoral and patellofemoral kinematics of ACLR knees will be similar to those of the contralateral uninjured control knee during passive flexion-extension, with bilateral differences emerging when an inertial load is applied. Read More

    Anterolateral Tenodesis or Anterolateral Ligament Complex Reconstruction: Effect of Flexion Angle at Graft Fixation When Combined With ACL Reconstruction.
    Am J Sports Med 2017 Sep 1:363546517724422. Epub 2017 Sep 1.
    Biomechanics Group, Mechanical Engineering Department, Imperial College London, London, UK.
    Background: Despite numerous technical descriptions of anterolateral procedures, knowledge is limited regarding the effect of knee flexion angle during graft fixation.

    Purpose: To determine the effect of knee flexion angle during graft fixation on tibiofemoral joint kinematics for a modified Lemaire tenodesis or an anterolateral ligament (ALL) complex reconstruction combined with anterior cruciate ligament (ACL) reconstruction.

    Study Design: Controlled laboratory study. Read More

    Gait Characteristics Associated With a Greater Increase in Medial Knee Cartilage T1ρ and T2 Relaxation Times in Patients Undergoing Anterior Cruciate Ligament Reconstruction.
    Am J Sports Med 2017 Sep 1:363546517723007. Epub 2017 Sep 1.
    Musculoskeletal and Quantitative Imaging Research, Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, USA.
    Background: Osteoarthritis of the medial tibiofemoral joint (MTFJ) is prevalent among patients undergoing anterior cruciate ligament reconstruction (ACLR). Magnetic resonance T1ρ and T2 relaxation times provide noninvasive methods to quantify early cartilage degeneration. Altered sagittal-plane gait biomechanics have been observed after ACLR, but their associations with longitudinal changes in MTFJ cartilage T1ρ and T2 remain unclear. Read More

    Rotator Cuff Calcific Tendinitis: Ultrasound-Guided Needling and Lavage Versus Subacromial Corticosteroids: Five-Year Outcomes of a Randomized Controlled Trial.
    Am J Sports Med 2017 Sep 1:363546517721686. Epub 2017 Sep 1.
    Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands.
    Background: Barbotage (needling and lavage) is often applied in the treatment of calcific tendinitis of the rotator cuff (RCCT). In a previously published randomized controlled trial, we reported superior clinical and radiological 1-year outcomes for barbotage combined with a corticosteroid injection in the subacromial bursa (SAIC) compared with an isolated SAIC. There are no trials with a midterm or long-term follow-up of barbotage available. Read More

    Single-Stage Cartilage Repair Using Platelet-Rich Fibrin Scaffolds With Autologous Cartilaginous Grafts.
    Am J Sports Med 2017 Sep 1:363546517719876. Epub 2017 Sep 1.
    Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
    Background: To avoid complicated procedures requiring in vitro chondrocyte expansion for cartilage repair, the development of a culture-free, 1-stage approach combining platelet-rich fibrin (PRF) and autologous cartilage grafts may be the solution.

    Purpose: To develop a feasible 1-step procedure to combine PRF and autologous cartilage grafts for articular chondral defects.

    Study Design: Controlled laboratory study Methods: The chemotactic effects of PRF on chondrocytes harvested from the primary culture of rabbit cartilage were evaluated in vitro and ex vivo. Read More

    Long-Term Outcomes of Anterior Cruciate Ligament Reconstruction Using Either Synthetics With Remnant Preservation or Hamstring Autografts: A 10-Year Longitudinal Study.
    Am J Sports Med 2017 Sep 1:363546517721692. Epub 2017 Sep 1.
    Department of Sports Medicine and Arthroscopy, Huashan Hospital, Shanghai, China.
    Background: The optimal graft choice of anterior cruciate ligament (ACL) reconstruction remains controversial.

    Purpose: To compare the outcomes, especially the long-term cumulative failure rate, of ACL reconstruction using either synthetics with remnant preservation or hamstring autografts (4-strand semitendinosus and gracilis tendons).

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

    Hyaluronic Acid Accelerates Tendon-to-Bone Healing After Rotator Cuff Repair.
    Am J Sports Med 2017 Sep 1:363546517720199. Epub 2017 Sep 1.
    Department of Orthopedic Surgery, Kurume University School of Medicine, Kurume, Japan.
    Background: There is growing evidence that the subacromial injection of hyaluronic acid (HA) is effective for pain relief in rotator cuff tears; however, its effect on tendon-to-bone healing remains unknown.

    Purpose: To examine the effect of HA on the chondrogenesis of mesenchymal stem cells (MSCs) in vitro and on tendon-to-bone healing in a rotator cuff repair model.

    Study Design: Controlled laboratory study. Read More

    A Novel Approach for Meniscal Regeneration Using Kartogenin-Treated Autologous Tendon Graft.
    Am J Sports Med 2017 Aug 1:363546517721192. Epub 2017 Aug 1.
    Department of Orthopaedics, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.
    Background: The meniscus is one of the most commonly injured parts of the body, and meniscal healing is difficult.

    Hypothesis: Kartogenin (KGN) induces tendon stem cells (TSCs) to differentiate into cartilage cells in vitro and form meniscus-like tissue in vivo. A damaged meniscus can be replaced with a KGN-treated autologous tendon graft. Read More

    Comparison of the Effects of Osteochondral Autograft Transplantation With Platelet-Rich Plasma or Platelet-Rich Fibrin on Osteochondral Defects in a Rabbit Model.
    Am J Sports Med 2017 Aug 1:363546517721188. Epub 2017 Aug 1.
    Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan.
    Background: Although osteochondral autograft transplantation (OAT) provides satisfactory outcomes for osteochondral defects, for large defects OAT is often inadequate because of graft availability. Osteochondral allograft transplantation is an alternative treatment for large defects, but this approach is limited by graft storage constraints and carries disease transmission risks. Platelet-rich fibrin (PRF) is a second-generation platelet concentrate, and its positive effect on articular cartilage has been reported. Read More

    The Incidence of Subsequent Meniscal Surgery Is Higher in the Anterior Cruciate Ligament-Reconstructed Knee Than in the Contralateral Knee.
    Am J Sports Med 2017 Aug 1:363546517721685. Epub 2017 Aug 1.
    Southern California Permanente Medical Group, Baldwin Park, California, USA.
    Background: A goal of anterior cruciate ligament (ACL) reconstruction is to provide a meniscal protective effect for the knee.

    Purpose: (1) To evaluate whether there was a different likelihood of subsequent meniscal surgery in the ACL-reconstructed knee or in the normal contralateral knee and (2) to compare the risk factors associated with subsequent meniscal surgery in the ACL-reconstructed knee and contralateral knee.

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

    Surgical Treatment of Distal Biceps Tendon Ruptures: An Analysis of Complications in 784 Surgical Repairs.
    Am J Sports Med 2017 Aug 1:363546517720200. Epub 2017 Aug 1.
    Department of Orthopaedic Surgery, Kaiser Permanente, Southern California, Baldwin Park, CA, USA.
    Background: Distal biceps brachii tendon ruptures lead to substantial deficits in elbow flexion and supination; surgical repair restores muscle strength and endurance.

    Purpose: To examine clinical and surgical outcomes for distal biceps tendon repairs in a large, multispecialty, integrated health care system.

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

    Correlation of 3D Shift and 3D Tilt of the Patella in Patients With Recurrent Dislocation of the Patella and Healthy Volunteers: An In Vivo Analysis Based on 3-Dimensional Computer Models.
    Am J Sports Med 2017 Aug 1:363546517720193. Epub 2017 Aug 1.
    Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan.
    Background: The concepts of lateral deviation and lateral inclination of the patella, characterized as shift and tilt, have been applied in combination to evaluate patellar malalignment in patients with patellar dislocation. It is not reasonable, however, to describe the 3-dimensional (3D) positional relation between the patella and the femur according to measurements made on 2-dimensional (2D) images.

    Purpose: The current study sought to clarify the relation between lateral deviation and inclination of the patella in patients with recurrent dislocation of the patella (RDP) by redefining them via 3D computer models as 3D shift and 3D tilt. Read More

    Does Additional Biceps Augmentation Improve Rotator Cuff Healing and Clinical Outcomes in Anterior L-Shaped Rotator Cuff Tears? Clinical Comparisons With Arthroscopic Partial Repair.
    Am J Sports Med 2017 Aug 1:363546517720198. Epub 2017 Aug 1.
    Department of Orthopedic Surgery, College of Medicine, Ewha Womans University, Mokdong Hospital, Seoul, Republic of Korea.
    Background: The repair of anterior L-shaped tears is usually difficult because of the lack of anterior rotator cuff tendon to cover the footprint. The biceps tendon is usually exposed from the retracted anterolateral corner of the torn tendon and can be easily used to augment rotator cuff repair. Hypothesis/Purpose: This study compared the clinical outcomes of the biceps augmentation technique with those of partial tendon repair for the arthroscopic treatment of large anterior L-shaped rotator cuff tears to evaluate the role of additional biceps augmentation in tendon healing. Read More

    A Comparison of Clinical Outcomes After Unilateral or Bilateral Hip Arthroscopic Surgery: Age- and Sex-Matched Cohort Study.
    Am J Sports Med 2017 Aug 1:363546517719020. Epub 2017 Aug 1.
    Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.
    Background: A significant number of patients undergoing hip arthroscopic surgery for femoroacetabular impingement (FAI) have bilateral deformities and may require surgery for both hips.

    Purpose: To compare outcomes between patients who underwent bilateral hip arthroscopic surgery to a matched cohort of patients who underwent unilateral hip arthroscopic surgery.

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

    Cam Deformities and Limited Hip Range of Motion Are Associated With Early Osteoarthritic Changes in Adolescent Athletes: A Prospective Matched Cohort Study.
    Am J Sports Med 2017 Aug 1:363546517719460. Epub 2017 Aug 1.
    Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
    Background: The natural history of femoroacetabular impingement (FAI) remains incompletely understood. In particular, there is limited documentation of joint damage in adolescent patients with limited range of motion (LROM) of the hip, which is commonly associated with FAI.

    Purpose: To evaluate changes in magnetic resonance imaging (MRI), radiographs, and clinical examinations over 5 years in a group of athletes from a wide variety of sports with asymptomatic LROM of the hip compared with matched controls. Read More

    How Should We Secure Our Transplanted Meniscus? A Meta-analysis.
    Am J Sports Med 2017 Aug 1:363546517720183. Epub 2017 Aug 1.
    Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland, USA.
    Background: Meniscal allograft transplant (MAT) is a salvage procedure for young patients with symptomatic meniscal deficiency. Although many studies report good outcomes, MAT remains controversial, and an optimal fixation technique for the meniscus roots is debated.

    Purpose: To assess the overall outcome of MAT and compare the results of different meniscal root fixation techniques. Read More

    Arthroscopic Harvest of Adipose-Derived Mesenchymal Stem Cells From the Infrapatellar Fat Pad.
    Am J Sports Med 2017 Aug 1:363546517719454. Epub 2017 Aug 1.
    Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, California, USA.
    Background: The successful isolation of adipose-derived mesenchymal stem cells (ADSCs) from the arthroscopically harvested infrapatellar fat pad (IFP) would provide orthopaedic surgeons with an autologous solution for regenerative procedures.

    Purpose: To demonstrate the quantity and viability of the mesenchymal stem cell population arthroscopically harvested from the IFP as well as the surrounding synovium.

    Study Design: Descriptive laboratory study. Read More

    Including the Copenhagen Adduction Exercise in the FIFA 11+ Provides Missing Eccentric Hip Adduction Strength Effect in Male Soccer Players: A Randomized Controlled Trial.
    Am J Sports Med 2017 Aug 1:363546517720194. Epub 2017 Aug 1.
    Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway.
    Background: The FIFA 11+ was developed as a complete warm-up program to prevent injuries in soccer players. Although reduced hip adduction strength is associated with groin injuries, none of the exercises included in the FIFA 11+ seem to specifically target hip adduction strength.

    Purpose: To investigate the effect on eccentric hip adduction strength of the FIFA 11+ warm-up program with or without the Copenhagen adduction exercise. Read More

    Opioid Demand Before and After Anterior Cruciate Ligament Reconstruction.
    Am J Sports Med 2017 Aug 1:363546517719226. Epub 2017 Aug 1.
    Department of Orthopedics and Rehabilitation, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.
    Background: Surgeons and health care systems have received a call to action in an effort to curtail the current opioid epidemic.

    Purpose: To (1) define the natural history of opioid demand after anterior cruciate ligament reconstruction (ACLR), (2) consider how filling preoperative opioid prescriptions affects opioid demand after ACLR, and (3) evaluate the effect of additional procedures during ACLR and patient age on postoperative opioid demand.

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

    Results of Anterior Cruciate Ligament Reconstruction With Patellar Tendon Autografts: Objective Factors Associated With the Development of Osteoarthritis at 20 to 33 Years After Surgery.
    Am J Sports Med 2017 Aug 1:363546517718827. Epub 2017 Aug 1.
    Shelbourne Knee Center, Community Hospital East, Indianapolis, Indiana, USA.
    Background: Few studies exist that report objective radiographic and physical examination results at >20 years after anterior cruciate ligament (ACL) reconstruction.

    Hypothesis: The risk of osteoarthritis (OA) at >20 years after surgery would be statistically significantly higher if an increased severity of factors was present.

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

    A Midterm Evaluation of Postoperative Platelet-Rich Plasma Injections on Arthroscopic Supraspinatus Repair: A Randomized Controlled Trial.
    Am J Sports Med 2017 Aug 1:363546517719048. Epub 2017 Aug 1.
    School of Human Sciences, The University of Western Australia, Perth, Western Australia, Australia.
    Background: Platelet-rich plasma (PRP) has been applied as an adjunct to rotator cuff repair to improve tendon-bone healing and potentially reduce the incidence of subsequent tendon retears.

    Purpose: To investigate whether the midterm clinical and radiographic outcomes of arthroscopic supraspinatus repair are enhanced after repeated postoperative applications of PRP.

    Study Design: Randomized controlled trial; Level of evidence, 1. Read More

    The Relationship of Throwing Arm Mechanics and Elbow Varus Torque: Within-Subject Variation for Professional Baseball Pitchers Across 82,000 Throws.
    Am J Sports Med 2017 Aug 1:363546517719047. Epub 2017 Aug 1.
    Research and Development, Motus Global, Rockville Centre, New York, USA.
    Background: Likely due to the high level of strain exerted across the elbow during the throwing motion, elbow injuries are on the rise in baseball. To identify at-risk athletes and guide postinjury return-to-throw programs, a better understanding of the variables that influence elbow varus torque is desired.

    Purpose: To describe the within-subject relationship between elbow varus torque and arm slot and arm rotation in professional baseball pitchers. Read More

    Critical Shoulder Angle and Acromial Index Do Not Influence 24-Month Functional Outcome After Arthroscopic Rotator Cuff Repair.
    Am J Sports Med 2017 Aug 1:363546517717947. Epub 2017 Aug 1.
    Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.
    Background: Recent studies have shown a correlation between scapular geometry and the development of atraumatic rotator cuff tears. However, a paucity of literature is available on the effects of critical shoulder angle (CSA) and acromial index (AI) on functional outcomes after arthroscopic rotator cuff repair. Hypothesis/Purpose: The purpose was to investigate the influence of CSA and AI on 24-month functional outcomes after arthroscopic rotator cuff repair. Read More

    Comparable Outcomes After Bucket-Handle Meniscal Repair and Vertical Meniscal Repair Can Be Achieved at a Minimum 2 Years' Follow-up.
    Am J Sports Med 2017 Aug 1:363546517719244. Epub 2017 Aug 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: Meniscal tears can lead to significant pain and disability, necessitating surgical treatment. Nondisplaced vertical tears are usually smaller in size and can be repaired in most cases; however, bucket-handle tears are usually larger and displaced, and the repair of these tears can be challenging. Purpose/Hypothesis: The purpose was to report the outcomes after inside-out vertical mattress suture meniscal repair of bucket-handle tears and to compare these outcomes with those of patients who underwent repair of nondisplaced vertical meniscal tears with a minimum of 2 years' follow-up. Read More

    Extracellular Matrix Cartilage Allograft and Particulate Cartilage Allograft for Osteochondral Lesions of the Knee and Ankle Joints: A Systematic Review.
    Am J Sports Med 2017 Aug 1:363546517717494. Epub 2017 Aug 1.
    Hospital for Special Surgery, New York, New York, USA.
    Background: Extracellular matrix cartilage allografts (EMCAs) and particulate cartilage allografts (PCAs) are relatively new biologics that may improve the quality of cartilage regeneration after bone marrow stimulation. The increasing popularity of these novel biologics in the treatment of osteochondral lesions (OCLs) of the knee and ankle joints prompts a systematic evaluation of their efficacies.

    Purpose: The purpose of this systematic review was to clarify the effectiveness of EMCAs and PCAs on cartilage regeneration. Read More

    Comparison of Clinical and Structural Outcomes by Subscapularis Tendon Status in Massive Rotator Cuff Tear.
    Am J Sports Med 2017 Sep 8;45(11):2555-2562. Epub 2017 Aug 8.
    Department of Orthopedic Surgery, Wonkwang University Hospital, Iksan, Republic of Korea.
    Background: The subscapularis tendon is essential in maintaining normal glenohumeral biomechanics. However, few studies have addressed the outcomes of tears extending to the subscapularis tendon in massive rotator cuff tears.

    Purpose: To assess the clinical and structural outcomes of arthroscopic repair of massive rotator cuff tears involving the subscapularis. Read More

    Perioperative Serum Lipid Status and Statin Use Affect the Revision Surgery Rate After Arthroscopic Rotator Cuff Repair.
    Am J Sports Med 2017 Aug 1:363546517717686. Epub 2017 Aug 1.
    Department of Orthopaedic Surgery, University of Virginia Health System, Charlottesville, Virginia, USA.
    Background: Recent animal studies have demonstrated that hyperlipidemia is associated with poor tendon-bone healing after rotator cuff repair; however, these findings have not been substantiated in human studies.

    Purpose: To examine any association between hyperlipidemia and the failure of arthroscopic rotator cuff repair requiring revision surgery and to investigate whether the use of statin lipid-lowering agents had any influence on observed associations.

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

    Sporting Activity Is Reduced 11 Years After First-Generation Autologous Chondrocyte Implantation in the Knee Joint.
    Am J Sports Med 2017 Aug 1:363546517716920. Epub 2017 Aug 1.
    Department of Orthopedics and Trauma Surgery, University Medical Center Freiburg, Faculty of Medicine, Albert Ludwig University of Freiburg, Freiburg, Germany.
    Background: Little is known about long-term sporting activity after periosteal autologous chondrocyte implantation (ACI-P) and its correlation to clinical, morphological, and ultrastructural cartilage characteristics on magnetic resonance imaging (MRI).

    Purpose: To evaluate long-term sporting activity after ACI-P and to correlate with clinical and MRI findings.

    Study Design: Case series; Level of evidence, 4. Read More

    Prevalence and Management of Coracoid Fracture Sustained During Sporting Activities and Time to Return to Sport: A Systematic Review.
    Am J Sports Med 2017 Aug 1:363546517718513. Epub 2017 Aug 1.
    University Hospitals Sports Medicine Institute, Cleveland, Ohio, USA.
    Background: Coracoid fractures sustained during sporting activities are rare. Previous reports are limited to individual case reports, small case series, and retrospective analyses.

    Purpose: To systematically review the literature and identify coracoid fractures sustained during sporting activities to determine fracture prevalence, sporting activities/mechanisms, management, and time to return to sport. Read More

    Heel-Rise Height Deficit 1 Year After Achilles Tendon Rupture Relates to Changes in Ankle Biomechanics 6 Years After Injury.
    Am J Sports Med 2017 Aug 1:363546517717698. Epub 2017 Aug 1.
    Department of Orthopaedics, Institute of Clinical Sciences at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Background: It is unknown whether the height of a heel-rise performed in the single-leg standing heel-rise test 1 year after an Achilles tendon rupture (ATR) correlates with ankle biomechanics during walking, jogging, and jumping in the long-term.

    Purpose: To explore the differences in ankle biomechanics, tendon length, calf muscle recovery, and patient-reported outcomes at a mean of 6 years after ATR between 2 groups that, at 1-year follow-up, had less than 15% versus greater than 30% differences in heel-rise height.

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

    Is There a Role for Internal Bracing and Repair of the Anterior Cruciate Ligament? A Systematic Literature Review.
    Am J Sports Med 2017 Aug 1:363546517717956. Epub 2017 Aug 1.
    Kerlan Jobe Orthopaedic Clinic, Los Angeles, California, USA.
    Background: Renewed interest has arisen in arthroscopic anterior cruciate ligament (ACL) repair techniques.

    Hypothesis: ACL repair with or without some form of internal bracing could lead to good outcomes in a carefully selected subset of patients.

    Study Design: Systematic review. Read More

    Shoulder Bone Geometry Affects the Active and Passive Axial Rotational Range of the Glenohumeral Joint.
    Am J Sports Med 2017 Aug 1:363546517716926. Epub 2017 Aug 1.
    Centre for Biomedical Engineering, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, UK.
    Background: The range of motion of the glenohumeral joint varies substantially among individuals and is dependent on humeral position. How variation in shape of the humerus and scapula affects shoulder axial range of motion at various positions has not been established.

    Purpose: To quantify variation in the shape of the glenohumeral joint and investigate whether the scapula and humerus geometries affect the axial rotational range of the glenohumeral joint. Read More

    An Anatomic and Biomechanical Comparison of Bankart Repair Configurations.
    Am J Sports Med 2017 Aug 1:363546517717671. Epub 2017 Aug 1.
    University of Connecticut Health Center, Farmington, Connecticut, USA.
    Background: Suture anchor repair for anterior shoulder instability can be performed using a number of different repair techniques, but none has been proven superior in terms of anatomic and biomechanical properties. Purpose/Hypothesis: The purpose was to compare the anatomic footprint coverage and biomechanical characteristics of 4 different Bankart repair techniques: (1) single row with simple sutures, (2) single row with horizontal mattress sutures, (3) double row with sutures, and (4) double row with labral tape. The hypotheses were as follows: (1) double-row techniques would improve the footprint coverage and biomechanical properties compared with single-row techniques, (2) horizontal mattress sutures would increase the footprint coverage compared with simple sutures, and (3) repair techniques with labral tape and sutures would not show different biomechanical properties. Read More

    Clinical and Radiological Regeneration of Large and Deep Osteochondral Defects of the Knee by Bone Augmentation Combined With Matrix-Guided Autologous Chondrocyte Transplantation.
    Am J Sports Med 2017 Aug 1:363546517717679. Epub 2017 Aug 1.
    Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany.
    Background: Large osteochondral defects of the knee are a challenge for regenerative treatment. While matrix-guided autologous chondrocyte transplantation (MACT) represents a successful treatment for chondral defects, the treatment potential in combination with bone grafting by cancellous bone or bone block augmentation for large and deep osteochondral defects has not been evaluated.

    Purpose: To evaluate 1- to 3-year clinical outcomes and radiological results on magnetic resonance imaging (MRI) after the treatment of large osteochondral defects of the knee with bone augmentation and MACT. Read More

    Biomechanical Evaluation of Glenoid Reconstruction With an Implant-Free J-Bone Graft for Anterior Glenoid Bone Loss.
    Am J Sports Med 2017 Aug 1:363546517716927. Epub 2017 Aug 1.
    Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA.
    Background: The anatomic restoration of glenoid morphology with an implant-free J-shaped iliac crest bone graft offers an alternative to currently widely used glenoid reconstruction techniques. No biomechanical data on the J-bone grafting technique are currently available.

    Purpose: To evaluate (1) glenohumeral contact patterns, (2) graft fixation under cyclic loading, and (3) the initial stabilizing effect of anatomic glenoid reconstruction with the implant-free J-bone grafting technique. Read More

    Effects of Surgical Factors on Cartilage Can Be Detected Using Quantitative Magnetic Resonance Imaging After Anterior Cruciate Ligament Reconstruction.
    Am J Sports Med 2017 Apr 27;45(5):1075-1084. Epub 2017 Jan 27.
    All members are listed in the Contributing Authors section at the end of this article.
    Background: Quantitative magnetic resonance (qMR) can be used to measure macromolecules in tissues and is a potential method of observing early cartilage changes in the development of posttraumatic osteoarthritis. Hypothesis/Purpose: We hypothesized that specific patient and surgical factors affecting cartilage matrix composition after anterior cruciate ligament (ACL) reconstruction (ACLR) can be detected using T1ρ and T2 relaxation times. Our purpose was to demonstrate this ability in a multicenter feasibility study. Read More

    The Effects of Anterolateral Tenodesis on Tibiofemoral Contact Pressures and Kinematics.
    Am J Sports Med 2017 Aug 1:363546517717260. Epub 2017 Aug 1.
    Biomechanics Group, Mechanical Engineering Department, Imperial College London, London, UK.
    Background: Anterolateral tenodeses are increasingly popular in combination with intra-articular anterior cruciate ligament reconstructions. Despite the perception of risk of overconstraint and lateral osteoarthritis, evidence is lacking regarding the effect of graft tensioning on knee kinematics and intra-articular compartmental joint pressures.

    Purpose: To investigate tibiofemoral joint contact pressures and kinematics related to an anterolateral lesion and the effectiveness of a MacIntosh tenodesis in restoring these when varying (1) graft tension and (2) tibial rotation during graft fixation. Read More

    Therapeutic Effects of Doxycycline on the Quality of Repaired and Unrepaired Achilles Tendons.
    Am J Sports Med 2017 Jul 1:363546517716637. Epub 2017 Jul 1.
    Bioengineering-Biomechanics Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA.
    Background: Achilles tendon tears are devastating injuries, especially to athletes. Elevated matrix metalloproteinase (MMP) activity after a tendon injury has been associated with deterioration of the collagen network and can be inhibited with doxycycline (Doxy).

    Hypothesis: Daily oral administration of Doxy will enhance the histological, molecular, and biomechanical quality of transected Achilles tendons. Read More

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