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    8151 results match your criteria American Journal of Sports Medicine[Journal]

    1 OF 164

    Subacromial Local Anesthetics Do Not Interfere With Rotator Cuff Healing After Arthroscopic Repair.
    Am J Sports Med 2018 Feb 1:363546517753827. Epub 2018 Feb 1.
    Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea.
    Background: Subacromial pain pumps are used for analgesia after arthroscopic rotator cuff surgery. However, there is controversy about myotoxic or tendinotoxic effects of local anesthetics.

    Hypothesis: Ropivacaine administered via a subacromial pain pump would have no adverse effect on rotator cuff tendon healing, fatty degeneration, strength, or functional outcomes after arthroscopic repair. Read More

    The Efficacy of Platelet-Rich Plasma and Platelet-Rich Fibrin in Arthroscopic Rotator Cuff Repair: A Meta-analysis of Randomized Controlled Trials.
    Am J Sports Med 2018 Feb 1:363546517751397. Epub 2018 Feb 1.
    Sports Surgery Clinic, Dublin, Ireland.
    Background: Basic science studies suggest that platelet-rich therapies have a positive effect on tendon repair. However, the clinical evidence is conflicted on whether this translates to increased tendon healing and improved functional outcomes.

    Purpose: To perform a systematic review of randomized controlled trials (RCTs) in the literature to ascertain whether platelet-rich plasma (PRP) or platelet-rich fibrin (PRF) improved patient outcomes in arthroscopic rotator cuff repair. Read More

    A Biomechanical Comparison of Fifth Metatarsal Jones Fracture Fixation Methods.
    Am J Sports Med 2018 Feb 1:363546517753376. Epub 2018 Feb 1.
    Houston Methodist Hospital, Orthopedics & Sports Medicine, Houston, Texas, USA.
    Background: Fifth metatarsal base fractures of the metaphyseal-diaphyseal watershed junction (Jones fracture) are commonly treated with surgical fixation in athletes. Intramedullary screw fixation remains the most utilized construct, although plantar-lateral plating is an alternative. Purpose/Hypothesis: The purpose was to compare the mechanical strength of fracture fixation between an intramedullary screw and plantar-lateral plating. Read More

    Analysis of Graft Length Change Patterns in Medial Patellofemoral Ligament Reconstruction via a Fluoroscopic Guidance Method.
    Am J Sports Med 2018 Feb 1:363546517752667. Epub 2018 Feb 1.
    Department of Orthopaedic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan.
    Background: A fluoroscopic guidance method for medial patellofemoral ligament (MPFL) reconstruction has been widely used to determine the anatomic femoral attachment site.

    Purpose: To examine the graft length change patterns in MPFL reconstruction with a fluoroscopic guidance method.

    Study Design: Cross-sectional study; Level of evidence, 3. Read More

    Video Analysis of Anterior Cruciate Ligament Tears in Professional American Football Athletes.
    Am J Sports Med 2018 Feb 1:363546518756328. Epub 2018 Feb 1.
    Department of Orthopaedic Surgery, Washington University School of Medicine, St Louis, Missouri, USA.
    Background: Anterior cruciate ligament (ACL) injuries are prevalent in contact sports that feature cutting and pivoting, such as American football. These injuries typically require surgical treatment, can result in significant missed time from competition, and may have deleterious long-term effects on an athlete's playing career and health. While the majority of ACL tears in other sports have been shown to occur from a noncontact mechanism, it stands to reason that a significant number of ACL tears in American football would occur after contact, given the nature of the sport. Read More

    Arthroscopic Surgery or Physical Therapy for Patients With Femoroacetabular Impingement Syndrome: A Randomized Controlled Trial With 2-Year Follow-up.
    Am J Sports Med 2018 Feb 1:363546517751912. Epub 2018 Feb 1.
    Department of Orthopaedics, Madigan Army Medical Center, Joint Base Lewis-McChord, Washington, USA.
    Background: Arthroscopic hip surgery has risen 18-fold in the past decade; however, there is a dearth of clinical trials comparing surgery with nonoperative management.

    Purpose: To determine the comparative effectiveness of surgery and physical therapy for femoroacetabular impingement syndrome.

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

    A Randomized Clinical Trial to Evaluate Attached Hamstring Anterior Cruciate Ligament Graft Maturity With Magnetic Resonance Imaging.
    Am J Sports Med 2018 Feb 1:363546517752918. Epub 2018 Feb 1.
    Department of Sports Medicine, Huashan Hospital, Shanghai, China.
    Background: The hamstring tendons are commonly harvested for anterior cruciate ligament (ACL) reconstruction with detachment of the tibial insertion. Retaining the insertion may help to preserve vascularity and viability of the graft and bypass the stages of avascular necrosis and revascularization, which might be beneficial to graft maturity.

    Purpose: To investigate and compare graft maturity by magnetic resonance imaging (MRI) after ACL reconstruction with preservation or detachment of hamstring tendon tibial insertion at up to 2 years. Read More

    Twenty-Year Follow-up Study Comparing Operative Versus Nonoperative Treatment of Anterior Cruciate Ligament Ruptures in High-Level Athletes.
    Am J Sports Med 2018 Feb 1:363546517751683. Epub 2018 Feb 1.
    Department of Orthopaedic Surgery, Erasmus University Medical Center, Rotterdam, the Netherlands.
    Background: An anterior cruciate ligament (ACL) rupture has major consequences at midterm follow-up, with an increasing chance of developing an old knee in a young patient. The long-term (≥20 years) effects of the operative and nonoperative treatment of ACL ruptures are still unclear.

    Purpose: To compare the long-term treatment outcomes of operative versus nonoperative treatment of ACL ruptures in high-level athletes. Read More

    Rotator Cuff Repair in Adolescent Athletes.
    Am J Sports Med 2018 Feb 1:363546517752919. Epub 2018 Feb 1.
    American Sports Medicine Institute, Birmingham, Alabama, USA.
    Background: Rotator cuff tears are rare injuries in adolescents but cause significant morbidity if unrecognized. Previous literature on rotator cuff repairs in adolescents is limited to small case series, with few data to guide treatment.

    Hypothesis: Adolescent patients would have excellent functional outcome scores and return to the same level of sports participation after rotator cuff repair but would have some difficulty with returning to overhead sports. Read More

    Biomechanical Evaluation of a Single- Versus Double-Tunnel Coracoclavicular Ligament Reconstruction With Acromioclavicular Stabilization for Acromioclavicular Joint Injuries.
    Am J Sports Med 2018 Feb 1:363546517752673. Epub 2018 Feb 1.
    Kerlan-Jobe Orthopaedic Clinic, Los Angeles, California, USA.
    Background: An anatomic double-tunnel (DT) reconstruction technique has been widely adopted to reconstruct the ruptured coracoclavicular (CC) ligaments seen with high-grade acromioclavicular (AC) joint injuries. However, the anatomic DT reconstruction has been associated with the risk of clavicle fractures, which may be problematic, particularly for contact athletes. Purpose/Hypothesis: The purpose was to compare a single-tunnel (ST) CC ligament reconstruction for AC joint injuries with the native state as well as with the more established anatomic DT CC ligament reconstruction. Read More

    Predictive Factors of Hamstring Tendon Regeneration and Functional Recovery After Harvesting: A Prospective Follow-up Study.
    Am J Sports Med 2018 Feb 1:363546517751660. Epub 2018 Feb 1.
    Department of Orthopaedic Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
    Background: Semitendinosus and gracilis tendons may regenerate after harvesting for ligament reconstruction procedures. However, predictive factors of tendon regeneration and the extent of functional recovery remain unclear.

    Purpose: To identify predictive factors for hamstring tendon regeneration and to examine the morbidity of nonregenerated hamstring tendons. Read More

    Lateral Augmentation Procedures in Anterior Cruciate Ligament Reconstruction: Anatomic, Biomechanical, Imaging, and Clinical Evidence.
    Am J Sports Med 2018 Feb 1:363546517751140. Epub 2018 Feb 1.
    Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, USA.
    Background: There has been an increasing interest in lateral-based soft tissue reconstructive techniques as augments to anterior cruciate ligament reconstruction (ACLR). The objective of these procedures is to minimize anterolateral rotational instability of the knee after surgery. Despite the relatively rapid increase in surgical application of these techniques, many clinical questions remain. Read More

    Preoperative KOOS and SF-36 Scores Are Associated With the Development of Symptomatic Knee Osteoarthritis at 7 Years After Anterior Cruciate Ligament Reconstruction.
    Am J Sports Med 2018 Feb 1:363546517751661. Epub 2018 Feb 1.
    Department of Orthopaedics, Warren Alpert Medical School of Brown University / Rhode Island Hospital, Providence, Rhode Island, USA.
    Background: Anterior cruciate ligament (ACL) tears are associated with the development of knee osteoarthritis despite ACL reconstruction surgery. However, little evidence is available to determine which patients will develop symptomatic knee osteoarthritis.

    Purpose: To determine if preoperative outcome measures-KOOS (Knee injury and Osteoarthritis Outcome Score) and SF-36 (36-item Short Form Health Survey)-were associated with the development of a symptomatic knee 7 years after ACL reconstruction. Read More

    Patellar Tendon Repair Augmentation With a Knotless Suture Anchor Internal Brace: A Biomechanical Cadaveric Study.
    Am J Sports Med 2018 Feb 1:363546517751916. Epub 2018 Feb 1.
    Department of Orthopedic Surgery, Stony Brook University School of Medicine, Stony Brook, New York, USA.
    Background: Patellar tendon repair with braided polyethylene suture alone is subject to knot slippage and failure. Several techniques to augment the primary repair have been described. Purpose/Hypothesis: The purpose was to evaluate a novel patellar tendon repair technique augmented with a knotless suture anchor internal brace with suture tape (SAIB). Read More

    Differences in the Lateral Compartment Joint Space Width After Anterior Cruciate Ligament Reconstruction: Data From the MOON Onsite Cohort.
    Am J Sports Med 2018 Jan 1:363546517751139. Epub 2018 Jan 1.
    Investigation performed at Cleveland Clinic, Cleveland, Ohio, USA, and Vanderbilt University Medical Center, Nashville, Tennessee, USA.
    Background: Anterior cruciate ligament (ACL) reconstruction can effectively return athletes to the playing field, but they are still at risk of developing posttraumatic osteoarthritis (PTOA). No studies have used multivariable analysis to evaluate the predictors of radiographic PTOA in the lateral compartment of the knee at short-term follow-up after ACL reconstruction.

    Purpose: To determine the predictors of radiographic joint space narrowing in the lateral compartment 2 to 3 years after ACL reconstruction in a young, active cohort. Read More

    The Augmentation of Revision Anterior Cruciate Ligament Reconstruction With Modified Iliotibial Band Tenodesis to Correct the Pivot Shift: A Computer Navigation Study.
    Am J Sports Med 2018 Jan 1:363546517750123. Epub 2018 Jan 1.
    Canberra Orthopaedics and Sports Medicine, Calvary Clinic, Bruce, Australia.
    Background: Iliotibial band (ITB) tenodesis improves stability and functional outcomes when added to anterior cruciate ligament (ACL) reconstruction. Its precise indications are unknown. Persistence of the pivot shift after revision ACL reconstruction may be one indication. Read More

    Outcomes of Latarjet Versus Distal Tibia Allograft for Anterior Shoulder Instability Repair: A Matched Cohort Analysis.
    Am J Sports Med 2018 Feb 1:363546517744203. Epub 2018 Feb 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: Anterior glenoid reconstruction with fresh distal tibia allograft (DTA) has been described for management of recurrent shoulder instability, with encouraging early outcomes; however, no comparative data with the Latarjet procedure are available.

    Purpose: The purpose of this study was to compare the clinical outcomes between patients undergoing DTA and a matched cohort of patients undergoing Latarjet.

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

    Preoperative Tibial Subchondral Bone Marrow Lesion Patterns and Associations With Outcomes After Isolated Meniscus Allograft Transplantation.
    Am J Sports Med 2018 Jan 1:363546517751690. Epub 2018 Jan 1.
    Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.
    Background: The association between preoperative tibial subchondral bone marrow lesion (BML) patterns and outcomes after isolated meniscus allograft transplantation (MAT) are unknown.

    Purpose: To determine (1) if a superior classification means exists (ie, high interrater reliability [IRR]) for grading tibial subchondral BML before isolated MAT and (2) whether quality and/or severity of preoperative tibial subchondral BML patterns was associated with clinical outcomes and/or failure rates after isolated MAT.

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

    Accuracy Between AJSM Author- Reported Disclosures and the Centers for Medicare and Medicaid Services Open Payments Database.
    Am J Sports Med 2018 Jan 1:363546517750124. Epub 2018 Jan 1.
    Hospital for Special Surgery, New York, New York, USA.
    Background: Inaccurate disclosures of physician and industry relationships in scientific reporting may create an asymmetry of information by hiding potential biases. The accuracy of conflict of interest disclosure in sports medicine research is unknown.

    Purpose: To compare author financial disclosures in published articles in 2016 in the American Journal of Sports Medicine ( AJSM) with the Centers for Medicare and Medicaid Services' Open Payments Database (OPD) to determine the percentage of payments values and percentage of eligible authors with discrepancies. Read More

    Distal Clavicular Osteochondral Autograft Augmentation for Glenoid Bone Loss: A Comparison of Radius of Restoration Versus Latarjet Graft.
    Am J Sports Med 2018 Jan 1:363546517749915. Epub 2018 Jan 1.
    Steadman Hawkins Clinic of the Carolinas, Greenville, South Carolina, USA.
    Background: Bone loss in shoulder instability is a well-recognized cause of failure after stabilization surgery. Many approaches have been described to address glenoid bone loss, including coracoid transfer. This transfer can be technically difficult and has been associated with high complication rates. Read More

    Revision Anterior Cruciate Ligament Reconstruction Outcomes in Younger Patients: Medial Meniscal Pathology and High Rates of Return to Sport Are Associated With Third ACL Injuries.
    Am J Sports Med 2018 Jan 1:363546517751141. Epub 2018 Jan 1.
    OrthoSport Victoria, Epworth HealthCare, Melbourne, Australia.
    Background: There are limited data evaluating the outcomes of revision anterior cruciate ligament (ACL) reconstruction surgery in younger patients despite recent reports that the rates of graft rupture are higher in young cohorts.

    Purpose: The purpose was to explore the outcomes of revision ACL reconstruction surgery in younger patients with the specific aims of determining the rates of third ACL injury and whether knee pathology at the time of revision surgery and return to sport were associated with further injury.

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

    Glenoid Bone Loss in Posterior Shoulder Instability: Prevalence and Outcomes in Arthroscopic Treatment.
    Am J Sports Med 2018 Jan 1:363546517750628. Epub 2018 Jan 1.
    Steadman Hawkins Clinic of the Carolinas, Greenville Health System, Greenville, South Carolina, USA.
    Background: Glenoid bone loss is a well-accepted risk factor for failure after arthroscopic stabilization of anterior glenohumeral instability. Glenoid bone loss in posterior instability has been noted relative to its existence in posterior instability surgery. Its effect on outcomes after arthroscopic stabilization has not been specifically evaluated and reported. Read More

    Incidence, Severity, and Time Loss Associated With Collegiate Football Fractures, 2004-2005 to 2013-2014.
    Am J Sports Med 2018 Jan 1:363546517749914. Epub 2018 Jan 1.
    Department of Exercise Science, University of North Carolina, Chapel Hill, North Carolina, USA.
    Background: The inherent risk of any time loss from physical injury in football has been extensively discussed, with many such injuries having a profound effect on the lives of National Collegiate Athletic Association (NCAA) football players. However, the incidence of fractures in collegiate football has not been well established.

    Purpose: To examine the epidemiology of fractures in NCAA football. Read More

    Intra-articular Injections of Platelet-Rich Plasma Releasate Reduce Pain and Synovial Inflammation in a Mouse Model of Osteoarthritis.
    Am J Sports Med 2018 Jan 1:363546517750635. Epub 2018 Jan 1.
    Department of Orthopaedics, Erasmus MC, University Medical Center, Rotterdam, the Netherlands.
    Background: Osteoarthritis (OA) is a degenerative joint disease leading to pain and disability for which no curative treatment exists. A promising biological treatment for OA is intra-articular administration of platelet-rich plasma (PRP). PRP injections in OA joints can relieve pain, although the exact working mechanism is unclear. Read More

    Systematic Review and Meta-analysis of Outcomes After Hip Arthroscopy in Femoroacetabular Impingement.
    Am J Sports Med 2018 Jan 1:363546517749475. Epub 2018 Jan 1.
    Columbia University Medical Center, New York, New York, USA.
    Background: Femoroacetabular impingement (FAI) has become a more commonly recognized cause of limited hip range of motion and hip pain among young adults and athletes. Hip arthroscopy is recommended for the surgical treatment of this disorder, unless specific contraindications exist. Despite the increasing rate of published studies in this area, there remains no aggregate data for outcomes after this approach. Read More

    Long-term Clinical Outcomes After Microfracture of the Glenohumeral Joint: Average 10-Year Follow-up.
    Am J Sports Med 2018 Jan 1:363546517750627. Epub 2018 Jan 1.
    Department of Orthopaedics, Rush University Medical Center, Chicago, Illinois, USA.
    Background: Microfracture is an effective surgical treatment for full-thickness cartilage defects of the knee; however, little is known regarding long-term outcomes after microfracture in the shoulder.

    Purpose: To present long-term clinical outcomes of patients undergoing microfracture of full-thickness articular cartilage defects of the glenohumeral joint.

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

    The Role of the Vascular and Structural Response to Activity in the Development of Achilles Tendinopathy: A Prospective Study.
    Am J Sports Med 2018 Jan 1:363546517750854. Epub 2018 Jan 1.
    Department of Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium.
    Background: Several risk factors have been suggested in the development of Achilles tendinopathy, but large-scale prospective studies are limited.

    Purpose: To investigate the role of the vascular response to activity of the Achilles tendon, tendon thickness, ultrasound tissue characterization (UTC) of tendon structure, and foot posture as possible risk factors in the development of Achilles tendinopathy.

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

    Synovial Fluid Profile at the Time of Anterior Cruciate Ligament Reconstruction and Its Association With Cartilage Matrix Composition 3 Years After Surgery.
    Am J Sports Med 2018 Jan 1:363546517749834. Epub 2018 Jan 1.
    Department of Radiology and Biomedical Imaging, University of California, San Francisco, California, USA.
    Background: Anterior cruciate ligament tears can lead to posttraumatic osteoarthritis. In addition to biomechanical factors, changes in biochemical profiles within the knee joint after injury and anterior cruciate ligament reconstruction (ACLR) may play a role in accelerating joint degeneration. Hypothesis/Purpose: It was hypothesized that cartilage matrix composition after ACLR is associated with the degree of inflammatory response after initial injury. Read More

    The Strength of Transosseous Medial Meniscal Root Repair Using a Simple Suture Technique Is Dependent on Suture Material and Position.
    Am J Sports Med 2018 Jan 1:363546517749807. Epub 2018 Jan 1.
    Department of Mechanical Engineering, University of Bath, Bath, UK.
    Background: A simple suture technique in transosseous meniscal root repair can provide equivalent resistance to cyclic load and is less technically demanding to perform compared with more complex suture configurations, yet maximum yield loads are lower. Various suture materials have been investigated for repair, but it is currently not clear which material is optimal in terms of repair strength. Meniscal root anatomy is also complex; consisting of the ligamentous mid-substance (root ligament), the transition zone between the meniscal body and root ligament; the relationship between suture location and maximum failure load has not been investigated in a simulated surgical repair. Read More

    Effect of Hip-Focused Injury Prevention Training for Anterior Cruciate Ligament Injury Reduction in Female Basketball Players: A 12-Year Prospective Intervention Study.
    Am J Sports Med 2018 Jan 1:363546517749474. Epub 2018 Jan 1.
    Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan.
    Background: Programs to prevent anterior cruciate ligament (ACL) injuries in female basketball players are scarce. Also, ACL injury prevention training that focuses on hip joint function has not been reported.

    Purpose: To determine the effectiveness of a hip-focused ACL injury prevention program in female basketball players. Read More

    Lesion Size Does Not Predict Outcomes in Fresh Osteochondral Allograft Transplantation.
    Am J Sports Med 2018 Jan 1:363546517746106. Epub 2018 Jan 1.
    Shiley Center for Orthopaedic Research & Education, Scripps Clinic, La Jolla, California, USA.
    Background: Cartilage repair algorithms use lesion size to choose surgical techniques when selecting a cartilage repair procedure. The association of fresh osteochondral allograft (OCA) size with graft survivorship and subjective patient outcomes is still unknown.

    Purpose: To determine if lesion size (absolute or relative) affects outcomes after OCA transplantation. Read More

    Cartilage Morphological and Histological Findings After Reconstruction of the Glenoid With an Iliac Crest Bone Graft.
    Am J Sports Med 2018 Jan 1:363546517749813. Epub 2018 Jan 1.
    Department of Orthopedics and Traumatology, Paracelsus Medical University, Salzburg, Austria.
    Background: The J-bone graft is presumably representative of iliac crest bone grafts in general and allows anatomic glenoid reconstruction in cases of bone defects due to recurrent traumatic anterior shoulder dislocations. As a side effect, these grafts have been observed to be covered by some soft, cartilage-like tissue when arthroscopy has been indicated after such procedures.

    Purpose: To evaluate the soft tissue covering of J-bone grafts by use of magnetic resonance imaging (MRI) and histological analysis. Read More

    Development of the HOOSto Assess Patient-Reported Outcomes in Patients Undergoing Hip Preservation Procedures.
    Am J Sports Med 2018 Jan 1:363546517749585. Epub 2018 Jan 1.
    Investigation performed at the University of Kentucky, Lexington, Kentucky, USA.
    Background: The creation of a single patient-reported outcome (PRO) platform validated across hip preservation, osteoarthritis (OA), and total hip arthroplasty (THA) populations may reduce barriers and streamline the routine collection of PROs in clinical practice. As such, the purpose of this study was to determine if augmenting the Hip disability and Osteoarthritis Outcome Score-Joint Replacement (HOOS, JR) with additional HOOS questions would result in a PRO platform that could be used across a wider spectrum of hip patient populations.

    Hypothesis: The HOOS, JR would demonstrate a notable ceiling effect, but by augmenting the HOOS, JR with additional HOOS questions, a responsive PRO platform could be created. Read More

    Defining the Learning Curve for Hip Arthroscopy: A Threshold Analysis of the Volume-Outcomes Relationship.
    Am J Sports Med 2018 Jan 1:363546517749219. Epub 2018 Jan 1.
    Hospital for Special Surgery, New York, New York, USA.
    Background: Hip arthroscopy has emerged as a successful option for the treatment of femoroacetabular impingement and related hip disorders, but the procedure is technically challenging.

    Purpose: To define the learning curve through which surgeons become proficient at hip arthroscopy.

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

    The Influence of Graft Fixation Methods on Revision Rates After Primary Anterior Cruciate Ligament Reconstruction.
    Am J Sports Med 2018 Jan 1:363546517748924. Epub 2018 Jan 1.
    Division of Sports Traumatology, Department of Orthopedics, Aarhus University Hospital, Aarhus, Denmark.
    Background: The method of graft fixation in primary anterior cruciate ligament (ACL) reconstruction is important for initial stability of the graft. Poor graft fixation can result in failure of the reconstruction. The effect of ACL graft fixation principles and fixation implant combinations on the risk of revision after ACL reconstruction is not well understood. Read More

    Concentrations of Blood Components in Commercial Platelet-Rich Plasma Separation Systems: A Review of the Literature.
    Am J Sports Med 2018 Jan 1:363546517746112. Epub 2018 Jan 1.
    OCON Centre for Orthopaedic Surgery, Hengelo, the Netherlands.
    Background: Platelet-rich plasma (PRP) has proven to be a very safe therapeutic option in the treatment of tendon, muscle, bone, and cartilage injuries. Currently, several commercial separation systems are available for the preparation of PRP. The concentrations of blood components in PRP among these separation systems vary substantially. Read More

    Posterior Cruciate Ligament Reconstruction With Transtibial or Tibial Inlay Techniques: A Meta-analysis of Biomechanical and Clinical Outcomes.
    Am J Sports Med 2018 Jan 1:363546517725070. Epub 2018 Jan 1.
    Department of Orthopaedic Surgery and Institute of Health Science, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea.
    Background: Transtibial (TT) or tibial inlay (TI) techniques are commonly used for posterior cruciate ligament reconstruction (PCLR). However, the optimum method for PCLR after PCL injury remains debatable. Hypothesis/Purpose: The hypothesis was that TT and TI techniques would not show significant differences for all outcome measures. Read More

    Macroscopic Rotator Cuff Tendinopathy and Histopathology Do Not Predict Repair Outcomes of Rotator Cuff Tears.
    Am J Sports Med 2018 Jan 1:363546517746986. Epub 2018 Jan 1.
    Musculoskeletal Institute, Department of Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA.
    Background: Numerous studies have identified factors that may affect the chances of rotator cuff healing after surgery. Intraoperative tendon quality may be used to predict healing and to determine type of repair and/or consideration of augmentation. There are no data that correlate how gross tendon morphology and degree of tendinopathy affect patient outcome or postoperative tendon healing. Read More

    Osteochondral Graft Size Is Significantly Associated With Increased Force and Decreased Chondrocyte Viability.
    Am J Sports Med 2018 Jan 1:363546517748906. Epub 2018 Jan 1.
    Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, Wisconsin, USA.
    Background: Insertion force has been shown to significantly reduce chondrocyte viability during osteochondral allograft transplantation. How graft size influences the required insertion force and chondrocyte viability has yet to be determined. Hypothesis/Purpose: The purpose was to characterize how graft size influences insertion force requirements and chondrocyte viability during osteochondral transplantation. Read More

    Investigating Effects of Sex Differences and Prior Concussions on Symptom Reporting and Cognition Among Adolescent Soccer Players.
    Am J Sports Med 2018 Jan 1:363546517749588. Epub 2018 Jan 1.
    Department of Physical Medicine and Rehabilitation, Harvard Medical School, Spaulding Rehabilitation Hospital, Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, MassGeneral Hospital for Children Sport Concussion Program, Boston, Massachusetts, USA.
    Background: There has been increasing concern regarding the possible effect of multiple concussions on the developing brain, especially for adolescent females. Hypothesis/Purpose: The objectives were to determine if there are differences in cognitive functioning, symptom reporting, and/or sex effects from prior concussions. In a very large sample of youth soccer players, it was hypothesized that (1) there would be no differences in cognitive test performance between those with and without prior concussions, (2) baseline preseason symptoms would be better predicted by noninjury factors than concussion history, and (3) males and females with prior concussions would not have differences in cognition or symptoms. Read More

    The Responsiveness of Patient- Reported Outcome Tools in Shoulder Surgery Is Dependent on the Underlying Pathological Condition.
    Am J Sports Med 2018 Jan 1:363546517749213. Epub 2018 Jan 1.
    Department of Orthopedic Surgery, Henry Ford Medical Center, Detroit, Michigan, USA.
    Background: Given the high number of available patient-reported outcome (PRO) tools for patients undergoing shoulder surgery, comparative information is necessary to determine the most relevant forms to incorporate into clinical practice.

    Purpose: To determine the utilization and responsiveness of common PRO tools in studies involving patients undergoing arthroscopic rotator cuff repair or operative management of glenohumeral instability.

    Study Design: Systematic review. Read More

    Modified Latarjet Without Capsulolabral Repair in Rugby Players With Recurrent Anterior Glenohumeral Instability and Significant Glenoid Bone Loss.
    Am J Sports Med 2018 Jan 1:363546517749586. Epub 2018 Jan 1.
    Department of Orthopedics and Traumatology, Prof. Dr. Carlos E. Ottolenghi, Hospital Italiano de Buenos Aires, Argentina.
    Background: The optimal management of recurrent anterior shoulder instability with significant glenoid bone loss in high-demand collision athletes remains a challenge.

    Purpose: To analyze the time to return to sport, clinical outcomes, and recurrences following a modified Latarjet procedure without capsulolabral repair in rugby players with recurrent anterior shoulder instability and significant glenoid bone loss.

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

    Location of Rotator Cuff Tear Initiation: A Magnetic Resonance Imaging Study of 191 Shoulders.
    Am J Sports Med 2018 Jan 1:363546517748925. Epub 2018 Jan 1.
    Department of Orthopaedic Surgery, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul, Republic of Korea.
    Background: Degenerative rotator cuff tears (RCTs) are generally thought to originate at the anterior margin of the supraspinatus tendon. However, a recent ultrasonography study suggested that they might originate more posteriorly than originally thought, perhaps even from the isolated infraspinatus (ISP) tendon, and propagate toward the anterior supraspinatus. Hypothesis/Purpose: It was hypothesized that this finding could be reproduced with magnetic resonance imaging (MRI). Read More

    Outcomes of Osteochondral Allograft Transplantation With and Without Concomitant Meniscus Allograft Transplantation: A Comparative Matched Group Analysis.
    Am J Sports Med 2018 Jan 1:363546517744202. Epub 2018 Jan 1.
    Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.
    Background: Osteochondral allograft transplantation (OCA) is often performed with concomitant meniscus allograft transplantation (MAT) as a strategy for knee joint preservation, although to date, the effect of concomitant MAT on outcomes and failure rates after OCA has not been assessed.

    Purpose: To determine clinical outcomes for patients undergoing OCA with MAT as compared with a matched cohort of patients undergoing isolated OCA.

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

    Risk Factors for Infection After Shoulder Arthroscopy in a Large Medicare Population.
    Am J Sports Med 2018 Jan 1:363546517749212. Epub 2018 Jan 1.
    Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, USA.
    Background: Shoulder arthroscopy is well established as a highly effective and safe procedure for the treatment for several shoulder disorders and is associated with an exceedingly low risk of infectious complications. Few data exist regarding risk factors for infection after shoulder arthroscopy, as previous studies were not adequately powered to evaluate for infection.

    Purpose: To determine patient-related risk factors for infection after shoulder arthroscopy by using a large insurance database. Read More

    Risk of Infection After Allograft Anterior Cruciate Ligament Reconstruction: Are Nonprocessed Allografts More Likely to Get Infected? A Cohort Study of Over 10,000 Allografts.
    Am J Sports Med 2018 Jan 1:363546517745876. Epub 2018 Jan 1.
    Department of Orthopaedics, Southern California Permanente Medical Group, Baldwin Park, California, USA.
    Background: Allograft tissue is frequently used in anterior cruciate ligament reconstruction (ACLR). It is often irradiated and/or chemically processed to decrease the risk of disease transmission, but some tissue is aseptically harvested without further processing. Irradiated and chemically processed allograft tissue appears to have a higher risk of revision, but whether this processing decreases the risk of infection is not clear. Read More

    Clinical Outcomes After Isolated Medial Patellofemoral Ligament Reconstruction for Patellar Instability Among Patients With Trochlear Dysplasia.
    Am J Sports Med 2018 Jan 1:363546517745625. Epub 2018 Jan 1.
    Sports Medicine and Shoulder Service, Hospital for Special Surgery, New York, New York, USA.
    Background: Medial patellofemoral ligament (MPFL) reconstruction has become one of the most common and widely used procedures to regain stability among patients with recurrent lateral patellar dislocation. While recent studies demonstrated low recurrence rates, improved patient-reported outcome measures, and a high rate of return to sports, limited literature explored its effectiveness as an isolated intervention in the context of trochlear dysplasia.

    Purpose: To determine the efficacy of isolated MPFL reconstruction in treating patellar instability in the setting of trochlear dysplasia. Read More

    Effect of Dynamic Changes in Anterior Cruciate Ligament In Situ Graft Force on the Biological Healing Response of the Graft-Tunnel Interface.
    Am J Sports Med 2018 Jan 1:363546517745624. Epub 2018 Jan 1.
    Sports Medicine and Shoulder Service, Tissue Engineering, Regeneration, and Repair Program, Hospital for Special Surgery, New York, New York, USA.
    Background: Anterior cruciate ligament (ACL) grafts that are placed for reconstruction are subject to complex forces. Current "anatomic" ACL reconstruction techniques may result in greater in situ graft forces. The biological effect of changing magnitudes of ACL graft force on graft-tunnel osseointegration is not well understood. Read More

    Cartilage Subsurface Changes to Magnetic Resonance Imaging UTE-T2* 2 Years After Anterior Cruciate Ligament Reconstruction Correlate With Walking Mechanics Associated With Knee Osteoarthritis.
    Am J Sports Med 2018 Jan 1:363546517743969. Epub 2018 Jan 1.
    Stanford University, Stanford, California, USA.
    Background: Anterior cruciate ligament (ACL) injury increases risk for posttraumatic knee osteoarthritis (OA). Quantitative ultrashort echo time enhanced T2* (UTE-T2*) mapping shows promise for early detection of potentially reversible subsurface cartilage abnormalities after ACL reconstruction (ACLR) but needs further validation against established clinical metrics of OA risk such as knee adduction moment (KAM) and mechanical alignment.

    Hypothesis: Elevated UTE-T2* values in medial knee cartilage 2 years after ACLR correlate with varus alignment and higher KAM during walking. Read More

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