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    8065 results match your criteria American Journal of Sports Medicine[Journal]

    1 OF 162

    Subchondral Bone Degradation After Microfracture for Osteochondral Lesions of the Talus: An MRI Analysis.
    Am J Sports Med 2017 Nov 1:363546517739606. Epub 2017 Nov 1.
    Hosptial for Special Surgery, New York, New York, USA.
    Background: Microfracture is the most common cartilage-reparative procedure for the treatment of osteochondral lesions of the talus (OLTs). Damage to the subchondral bone (SCB) during microfracture may irreversibly change the joint-loading support of the ankle, leading to reparative fibrocartilage degradation over time.

    Purpose: To investigate the morphological change in the SCB after microfracture for OLT by developing a novel magnetic resonance imaging (MRI) scoring system specifically for evaluating the SCB. Read More

    Bursal-Sided Rotator Cuff Tears: Simple Versus Everted Type.
    Am J Sports Med 2017 Nov 1:363546517739577. Epub 2017 Nov 1.
    Shoulder & Elbow Clinic, Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
    Background: No studies have focused on the everted type of bursal-sided partial-thickness rotator cuff tears (PTRCTs).

    Purpose: To evaluate the radiological characteristics, arthroscopic findings, and clinical and structural outcomes after arthroscopic repair of the everted type of bursal-sided PTRCTs.

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

    Do Outcomes of Osteochondral Allograft Transplantation Differ Based on Age and Sex? A Comparative Matched Group Analysis.
    Am J Sports Med 2017 Nov 1:363546517739625. Epub 2017 Nov 1.
    Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.
    Background: The effect of patient age or sex on outcomes after osteochondral allograft transplantation (OCA) has not been assessed.

    Purpose: To determine clinical outcomes for male and female patients aged ≥40 years undergoing OCA compared with a group of patients aged <40 years.

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

    Selective Debridement With Labral Preservation Using Narrow Indications in the Hip: Minimum 5-Year Outcomes With a Matched-Pair Labral Repair Control Group.
    Am J Sports Med 2017 Nov 1:363546517739566. Epub 2017 Nov 1.
    American Hip Institute, Westmont, Illinois, USA.
    Background: Arthroscopic labral debridement in the hip can be an effective treatment for labral tears but has demonstrated inferior outcomes compared with labral repair. Thus, the role for labral debridement has become unclear. Hypothesis/Purpose: The purpose was to evaluate the outcomes of a selective debridement with labral preservation (SDLP) group with a minimum 5-year follow-up. Read More

    Effects of the New York State Concussion Management and Awareness Act ("Lystedt Law") on Concussion-Related Emergency Health Care Utilization Among Adolescents, 2005-2015.
    Am J Sports Med 2017 Nov 1:363546517738742. Epub 2017 Nov 1.
    Department of Neurology, Columbia University, New York, New York, USA.
    Background: All states have enacted legislation addressing the management of sports-related concussions (SRCs) in adolescent athletes. The effect of these laws on health care utilization is uncertain. Hypothesis/Purpose: The purpose was to evaluate the effects of New York's 2011 Concussion Management and Awareness Act ("Lystedt Law") on emergency department (ED) concussion health care visits (EDCHVs) and brain imaging utilization. Read More

    The Effects of Playing Multiple High School Sports on National Basketball Association Players' Propensity for Injury and Athletic Performance.
    Am J Sports Med 2017 Nov 1:363546517738736. Epub 2017 Nov 1.
    Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California, USA.
    Background: Athletes who specialize in their sport at an early age may be at risk for burnout, overuse injury, and reduced attainment of elite status. Timing of sport specialization has not been studied in elite basketball athletes.

    Hypothesis: National Basketball Association (NBA) players who played multiple sports during adolescence would be less likely to experience injury and would have higher participation rates in terms of games played and career length compared with single-sport athletes. Read More

    Return to Play After Hip Arthroscopic Surgery for Femoroacetabular Impingement in Professional Soccer Players.
    Am J Sports Med 2017 Nov 1:363546517738741. Epub 2017 Nov 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: Arthroscopic hip surgery has been shown to be effective in returning professional athletes back to play at a high level of performance in different sports. Limited information exists regarding professional soccer players and their return to play.

    Purpose: To determine the rate and time to return to sport for professional soccer players after hip arthroscopic surgery for the treatment of femoroacetabular impingement (FAI) and to identify possible risk factors associated with a delay in returning to play. Read More

    Frontal Plane Knee Mechanics and Early Cartilage Degeneration in People With Anterior Cruciate Ligament Reconstruction: A Longitudinal Study.
    Am J Sports Med 2017 Nov 1:363546517739605. Epub 2017 Nov 1.
    Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California, San Francisco, California, USA.
    Background: Abnormal frontal plane gait mechanics are known risk factors for knee osteoarthritis, but their role in early cartilage degeneration after anterior cruciate ligament reconstruction (ACLR) is not well understood. Hypothesis/Purpose: The objective was to evaluate the association of frontal plane gait mechanics with medial knee cartilage magnetic resonance (MR) relaxation times over 1 year in patients with ACLR and controls. It was hypothesized that (1) there will be an increase in frontal plane medial knee loading and medial knee MR relaxation times over time in the patients with ACLR, and (2) increases in frontal plane medial knee loading will be associated with an increase in medial knee MR relaxation times. Read More

    Autologous Chondrocyte Implantation "Sandwich" Technique Compared With Autologous Bone Grafting for Deep Osteochondral Lesions in the Knee.
    Am J Sports Med 2017 Nov 1:363546517738000. Epub 2017 Nov 1.
    Cartilage Repair Center, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
    Background: Treating symptomatic osteochondral defects is challenging, especially in young adults with deep (>8-10 mm) empty defects after osteochondritis dissecans (OCD) or collapsed condyles secondary to avascular necrosis (AVN). For this population, osteoarthritis (OA) is inevitable if articular congruence is not restored.

    Purpose: To describe the autologous chondrocyte implantation (ACI) "sandwich" technique with autologous bone grafting (ABG) and compare it with ABG alone for restoration of the osteochondral unit. Read More

    Hypothermia Promotes Cell-Protective and Chondroprotective Effects After Blunt Cartilage Trauma.
    Am J Sports Med 2017 Nov 1:363546517736051. Epub 2017 Nov 1.
    Division for Biochemistry of Joint and Connective Tissue Diseases, Department of Orthopedics, University of Ulm, Ulm, Germany.
    Background: Cryotherapy is routinely administered after sports injuries of synovial joints. Although positive clinical effects on periarticular swelling and pain have been described, the effects on the cell biological activities of cartilage and synovial cells remain largely unknown so far.

    Hypothesis: Local hypothermia alleviates synovial reactions and prevents chondrocyte death as well as cartilage destructive processes after blunt cartilage trauma. Read More

    Meniscectomy and Resultant Articular Cartilage Lesions of the Knee Among Prospective National Football League Players: An Imaging and Performance Analysis.
    Am J Sports Med 2017 Nov 1:363546517737991. Epub 2017 Nov 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: The effect of prior meniscectomy and the resulting reduction in meniscal tissue on a potential National Football League (NFL) player's articular cartilage status and performance remain poorly elucidated. Purpose/Hypothesis: (1) To determine the epidemiology, imaging characteristics, and associated articular cartilage pathology of the knee among players with a previous meniscectomy who were participating in the NFL Combine and (2) to evaluate the effect of these injuries on performance as compared with matched controls. The hypothesis was that players with less meniscal tissue would have worse cartilage status and inferior performance metrics in their first 2 NFL seasons. Read More

    Treatment of Knee Osteochondritis Dissecans With a Cell-Free Biomimetic Osteochondral Scaffold: Clinical and Imaging Findings at Midterm Follow-up.
    Am J Sports Med 2017 Nov 1:363546517737763. Epub 2017 Nov 1.
    Nano-Biotechnology Laboratory, Rizzoli Orthopaedic Institute, Bologna, Italy.
    Background: Osteochondritis dissecans (OCD) is a developmental condition of subchondral bone that may result in secondary separation and instability of the overlying articular cartilage, which in turn may lead to degeneration of the overall joint and early osteoarthritis. Biphasic scaffolds have been developed to address defects of the entire osteochondral unit by reproducing the different biological and functional requirements and guiding the growth of both bone and cartilage.

    Purpose: To evaluate midterm clinical and imaging results after cell-free osteochondral scaffold implantation for the treatment of knee OCD. Read More

    Autologous Chondrocyte Implantation in Osteoarthritic Surroundings: TNFα and Its Inhibition by Adalimumab in a Knee-Specific Bioreactor.
    Am J Sports Med 2017 Nov 1:363546517737497. Epub 2017 Nov 1.
    Department of Orthopaedic and Trauma Surgery, University Medical Center, Albert-Ludwigs University Freiburg, Freiburg, Germany.
    Background: Autologous chondrocyte implantation (ACI) fails in up to 20% of cases. Advanced intra-articular degeneration paired with an inflammatory environment may be closely related to implantation failure. Certain cytokines have been identified to play a major role during early osteoarthritis. Read More

    Effects of Anterior Closing Wedge Tibial Osteotomy on Anterior Cruciate Ligament Force and Knee Kinematics.
    Am J Sports Med 2017 Nov 1:363546517736767. Epub 2017 Nov 1.
    Biomechanics Laboratory, Department of Orthopaedic Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
    Background: A certain percentage of patients undergoing anterior cruciate ligament (ACL) reconstruction will experience graft failure, and there is mounting evidence that an increased posterior tibial slope (PTS) may be a predisposing factor. Theoretically, under tibiofemoral compression force (TFC), a reduced PTS would induce less anterior tibial translation (ATT) and lower ACL force.

    Hypothesis: Ten-degree anterior closing wedge osteotomy of the proximal tibia will significantly reduce ACL force and alter knee kinematics during robotic testing. Read More

    Intra-articular Mesenchymal Stem Cell Therapy for the Human Joint: A Systematic Review.
    Am J Sports Med 2017 Nov 1:363546517735844. Epub 2017 Nov 1.
    Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.
    Background: Stem cell therapy is emerging as a potential treatment of osteoarthritis (OA) and chondral defects (CDs). However, there is a great deal of heterogeneity in the literature. The indications for stem cell use, the ideal tissue source, and the preferred outcome measures for stem cell-based treatments have yet to be determined. Read More

    Efficacy of a Prevention Program for Medial Elbow Injuries in Youth Baseball Players.
    Am J Sports Med 2017 Nov 1:363546517738003. Epub 2017 Nov 1.
    Waseda University, Saitama, Japan.
    Background: Youth baseball players are at high risk for elbow injuries, which can lead to future functional disability.

    Purpose: To evaluate the effectiveness of a prevention program to lower the risk of medial elbow injury in these athletes.

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

    Variation in the Medial Patellofemoral Ligament Origin in the Skeletally Immature Knee: An Anatomic Study.
    Am J Sports Med 2017 Oct 1:363546517738002. Epub 2017 Oct 1.
    Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
    Background: The medial patellofemoral ligament (MPFL) is frequently reconstructed to treat recurrent patellar instability. The femoral origin of the MPFL is well described in adults but not in the skeletally immature knee.

    Purpose: To identify a radiographic landmark for the femoral MPFL attachment in the skeletally immature knee and study its relationship to the distal femoral physis. Read More

    Calf Muscle Performance Deficits Remain 7 Years After an Achilles Tendon Rupture.
    Am J Sports Med 2017 Oct 1:363546517737055. Epub 2017 Oct 1.
    Department of Orthopaedics, Institute of Clinical Sciences at Sahlgrenska Academy, University of Gothenburg, Mölndal, Sweden.
    Background: Optimizing calf muscle performance seems to play an important role in minimizing impairments and symptoms after an Achilles tendon rupture (ATR). The literature lacks long-term follow-up studies after ATR that describe calf muscle performance over time.

    Purpose: The primary aim was to evaluate calf muscle performance and patient-reported outcomes at a mean of 7 years after ATR in patients included in a prospective, randomized controlled trial. Read More

    Gait Retraining for the Reduction of Injury Occurrence in Novice Distance Runners: 1-Year Follow-up of a Randomized Controlled Trial.
    Am J Sports Med 2017 Oct 1:363546517736277. Epub 2017 Oct 1.
    Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong.
    Background: The increasing popularity of distance running has been accompanied by an increase in running-related injuries, such that up to 85% of novice runners incur an injury in a given year. Previous studies have used a gait retraining program to successfully lower impact loading, which has been associated with many running ailments. However, softer footfalls may not necessarily prevent running injury. Read More

    Multicenter Analysis of Midterm Clinical Outcomes of Arthroscopic Labral Repair in the Hip: Minimum 5-Year Follow-up.
    Am J Sports Med 2017 Oct 1:363546517734180. Epub 2017 Oct 1.
    American Hip Institute, Westmont, Illinois, USA.
    Background: The technique of hip arthroscopic surgery is advancing and becoming more commonly performed. However, most current reported results are limited to short-term follow-up, and therefore, the durability of the procedure is largely unknown.

    Purpose: To perform a multicenter analysis of mid-term clinical outcomes of arthroscopic hip labral repair and determine the risk factors for patient outcomes. Read More

    Hamstring Graft Incorporation According to the Length of the Graft Inside Tunnels.
    Am J Sports Med 2017 Oct 1:363546517733472. Epub 2017 Oct 1.
    Department of Orthopedic Surgery and Trauma, Hôpital Pierre-Paul Riquet, Toulouse, France.
    Background: Anterior cruciate ligament (ACL) reconstruction with a quadrupled semitendinosus (ST4) graft is an evolution of the standard technique with 2 hamstring tendons (semitendinosus + gracilis [STG]). However, there is no published comparison of how well these 2 types of hamstring grafts are incorporated into the bone tunnels. Because the ST4 graft is shorter, there is less graft material inside the tunnels. Read More

    Medial Meniscus Resection Increases and Medial Meniscus Repair Preserves Anterior Knee Laxity: A Cohort Study of 4497 Patients With Primary Anterior Cruciate Ligament Reconstruction.
    Am J Sports Med 2017 Oct 1:363546517737054. Epub 2017 Oct 1.
    Capio Artro Clinic, Valhallavägen, Stockholm, Sweden.
    Background: There are still controversies regarding the effects on knee laxity of additional meniscus resection or repair in the setting of anterior cruciate ligament reconstruction (ACLR). Hypothesis/Purpose: The purpose was to determine the effects on knee laxity of resection or repair of medial meniscus (MM) or lateral meniscus (LM) injuries in the ACLR knee. The hypothesis was that patients with an additional meniscus resection would have significantly increased postoperative knee laxity versus that of an isolated ACLR, whereas patients with meniscus repair would have laxity comparable to that of an isolated ACLR. Read More

    Mesenchymal Stem Cell Secretome Improves Tendon Cell Viability In Vitro and Tendon-Bone Healing In Vivo When a Tissue Engineering Strategy Is Used in a Rat Model of Chronic Massive Rotator Cuff Tear.
    Am J Sports Med 2017 Oct 1:363546517735850. Epub 2017 Oct 1.
    Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal.
    Background: Massive rotator cuff tears (MRCTs) represent a major clinical concern, especially when degeneration and chronicity are involved, which highly compromise healing capacity.

    Purpose: To study the effect of the secretome of mesenchymal stem cells (MSCs) on tendon cells (TCs) followed by the combination of these activated TCs with an electrospun keratin-based scaffold to develop a tissue engineering strategy to improve tendon-bone interface (TBi) healing in a chronic MRCT rat model.

    Study Design: Controlled laboratory study. Read More

    Comparison of 2 Exercise Rehabilitation Programs for Multidirectional Instability of the Glenohumeral Joint: A Randomized Controlled Trial.
    Am J Sports Med 2017 Oct 1:363546517734508. Epub 2017 Oct 1.
    Department of Rehabilitation, Nutrition and Sport, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Bundoora, Australia.
    Background: The recommended initial treatment for multidirectional instability (MDI) of the shoulder is a rehabilitation program, yet there is very low-quality evidence to support this approach. Purpose/Hypothesis: The purpose was to compare the Watson MDI program and Rockwood Instability program among patients with nontraumatic, nonstructural MDI. The hypothesis was that the Watson MDI program would produce clinically and statistically superior outcomes over the Rockwood Instability program. Read More

    The Effect of Hamstring Tendon Autograft Harvest on the Restoration of Knee Stability in the Setting of Concurrent Anterior Cruciate Ligament and Medial Collateral Ligament Injuries.
    Am J Sports Med 2017 Oct 1:363546517732743. Epub 2017 Oct 1.
    Department of Orthopaedic Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA.
    Background: A hamstring autograft is commonly used in anterior cruciate ligament (ACL) reconstruction (ACLR); however, there is evidence to suggest that the tendons harvested may contribute to medial knee instability.

    Hypothesis: We tested the hypothesis that the gracilis (G) and semitendinosus (ST) tendons significantly contribute to sagittal, coronal, and/or rotational knee stability in the setting of ACLR with a concurrent partial medial collateral ligament (MCL) injury.

    Study Design: Controlled laboratory study. Read More

    Epidemiology of Shoulder and Elbow Injuries Among United States High School Baseball Players: School Years 2005-2006 Through 2014-2015.
    Am J Sports Med 2017 Oct 1:363546517734172. Epub 2017 Oct 1.
    Andrews Institute for Orthopaedics & Sports Medicine, Gulf Breeze, Florida, USA.
    Background: Shoulder and elbow injuries are common in young athletes, especially high school baseball players. Understanding the risk factors associated with baseball injuries is an essential first step in the development of injury prevention strategies.

    Purpose: To provide a comprehensive understanding of the epidemiology of shoulder and elbow injuries among high school baseball players in the United States. Read More

    Clinical Outcomes and Failure Rates of Osteochondral Allograft Transplantation in the Knee: A Systematic Review.
    Am J Sports Med 2017 Oct 1:363546517732531. Epub 2017 Oct 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: Cartilage lesions are a significant cause of morbidity and impaired knee function; however, cartilage repair procedures have failed to reproduce native cartilage to date. Thus, osteochondral allograft (OCA) transplantation represents a 1-step procedure to repair large chondral defects without the donor site morbidity of osteochondral autograft transplantation.

    Purpose: To perform a systematic review of clinical outcomes and failure rates after OCA transplantation in the knee at a minimum mean 2 years' follow-up. Read More

    Geometric Characteristics of the Knee Are Associated With a Noncontact ACL Injury to the Contralateral Knee After Unilateral ACL Injury in Young Female Athletes.
    Am J Sports Med 2017 Oct 1:363546517735091. Epub 2017 Oct 1.
    Department of Orthopaedics and Rehabilitation, University of Vermont, Burlington, Vermont, USA.
    Background: Contralateral anterior cruciate ligament (CACL) injury after recovery from a first-time ACL rupture occurs at a high rate in young females; however, little is known about the risk factors associated with bilateral ACL trauma.

    Hypothesis: The geometric characteristics of the contralateral knee at the time of the initial ACL injury are associated with risk of suffering a CACL injury in these female athletes.

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

    Return to Sport-Specific Performance After Primary Anterior Cruciate Ligament Reconstruction: A Systematic Review.
    Am J Sports Med 2017 Oct 1:363546517732541. Epub 2017 Oct 1.
    University of Calgary Sport Medicine Centre, Calgary, Alberta, Canada.
    Background: Physicians counseling athletes on the prognosis of sport-specific performance outcomes after anterior cruciate ligament reconstruction (ACLR) depend on the published literature. However, critical appraisal of the validity and biases in these studies is required to understand how ACLR affects an athlete's ability to return to sport, the athlete's sport-specific performance, and his or her ability to achieve preinjury levels of performance.

    Purpose: This review identifies the published prognostic studies evaluating sport-specific performance outcomes after ACLR. Read More

    Pain Management After Hip Arthroscopy: Systematic Review of Randomized Controlled Trials and Cohort Studies.
    Am J Sports Med 2017 Oct 1:363546517734518. Epub 2017 Oct 1.
    Department of Orthopaedics and Sports Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
    Background: Hip arthroscopy is often associated with significant postoperative pain and opioid-associated side effects. Effective pain management after hip arthroscopy improves patient recovery and satisfaction and decreases opioid-related complications.

    Purpose: To collect, examine, and provide a comprehensive review of the available evidence from randomized controlled trials and comparative studies on pain control after hip arthroscopy. Read More

    Posterior Tibial Translation Measurements on Magnetic Resonance Imaging Improve Diagnostic Sensitivity for Chronic Posterior Cruciate Ligament Injuries and Graft Tears.
    Am J Sports Med 2017 Oct 1:363546517734201. Epub 2017 Oct 1.
    The Steadman Clinic, Vail, Colorado, USA.
    Background: Magnetic resonance imaging (MRI) of the knee is a highly sensitive and specific method for diagnosing acute posterior cruciate ligament (PCL) tears, with a reported accuracy of 96% to 100%. In chronic and revision settings, these injuries may be missed on MRI because of the apparent continuity of nonfunctional PCL fibers. Posterior tibial translation (PTT) of the medial compartment has been identified as a potential secondary finding of PCL tear on routine MRI. Read More

    Hip and Ankle Kinematics in Noncontact Anterior Cruciate Ligament Injury Situations: Video Analysis Using Model-Based Image Matching.
    Am J Sports Med 2017 Oct 1:363546517732750. Epub 2017 Oct 1.
    Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway.
    Background: Detailed kinematic descriptions of real anterior cruciate ligament (ACL) injury situations are limited to the knee only.

    Purpose: To describe hip and ankle kinematics as well as foot position relative to the center of mass (COM) in ACL injury situations through use of a model-based image-matching (MBIM) technique. The distance between the projection of the COM on the ground and the base of support (BOS) (COM_BOS) normalized to the femur length was also evaluated. Read More

    A Biomechanical Analysis of the Association Between Forearm Mechanics and the Elbow Varus Moment in Collegiate Baseball Pitchers.
    Am J Sports Med 2017 Oct 1:363546517733471. Epub 2017 Oct 1.
    Elite Sports Medicine, Connecticut Children's Medical Center, Hartford, Connecticut, USA.
    Background: The incidence of upper extremity injury in baseball pitchers has increased over the past decade. This has resulted in a large body of research mainly focused on the kinematic and kinetic patterns of the elbow and shoulder to elucidate the cause of these injuries, with little attention on studying the associations of forearm rotation and upper arm joint moments.

    Hypothesis: There will be significant differences in forearm kinematics and kinetics when comparing the fastball pitch with the curveball pitch. Read More

    Significant Chondrocyte Viability Is Present in Acetabular Chondral Flaps Associated With Femoroacetabular Impingement.
    Am J Sports Med 2017 Oct 1:363546517732751. Epub 2017 Oct 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: Patients presenting with cam deformity of the femoral head and neck sustain repeated trauma to the articular cartilage of the superior acetabulum, with chondral delamination injuries found during hip arthroscopy. Two previous studies reveal conflicting chondrocyte viability data in these traumatic cartilage injuries. The full-thickness nature of flaps may suggest that chondrocytes residing in the cartilage flap matrix in the joint environment would remain viable despite shear trauma. Read More

    Stem Cell Therapy for Articular Cartilage Repair: Review of the Entity of Cell Populations Used and the Result of the Clinical Application of Each Entity.
    Am J Sports Med 2017 Oct 1:363546517729152. Epub 2017 Oct 1.
    Department of Orthopedic Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Dongjak-gu, Seoul, Republic of Korea.
    Background: Following successful preclinical studies, stem cell therapy is emerging as a candidate for the treatment of articular cartilage lesions. Because stem cell therapy for cartilage repair in humans is at an early phase, confusion and errors are found in the literature regarding use of the term stem cell therapy in this field.

    Purpose: To provide an overview of the outcomes of cartilage repair, elucidating the various cell populations used, and thus reduce confusion with regard to using the term stem cell therapy. Read More

    Outcomes After Operative and Nonoperative Treatment of Proximal Hamstring Avulsions: A Systematic Review and Meta-analysis.
    Am J Sports Med 2017 Oct 1:363546517732526. Epub 2017 Oct 1.
    Department of Orthopaedic Surgery, MedStar Georgetown University Hospital, Washington, DC, USA.
    Background: No meta-analysis has compared outcomes of operative and nonoperative proximal hamstring avulsion treatment.

    Purpose: To compare outcomes of operative and nonoperative proximal hamstring avulsion treatment, including acute, chronic, partial, and complete repairs.

    Study Design: Meta-analysis. Read More

    Added Value of Preoperative Computed Tomography for Determining Cartilage Degeneration in Patients With Osteochondral Lesions of the Talar Dome.
    Am J Sports Med 2017 Oct 1:363546517732035. Epub 2017 Oct 1.
    Department of Orthopaedic Surgery, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan.
    Background: Osteochondral lesions of the talar dome (OLTs) involve the articular cartilage and subchondral bone. The subchondral bone plate (SBP) plays a crucial role in cartilage metabolism, and computed tomography (CT) can provide more precise information on subchondral bone. CT image prediction of the histological findings on OLT will be useful to determine the most appropriate therapeutic strategy. Read More

    Quantitative and Qualitative Analysis of the Medial Patellar Ligaments: An Anatomic and Radiographic Study.
    Am J Sports Med 2017 Oct 1:363546517729818. Epub 2017 Oct 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: The qualitative and quantitative anatomy of the medial patellar stabilizers has been reported; however, a quantitative analysis of the anatomic and radiographic attachments of all 4 ligaments relative to anatomic and osseous landmarks, as well as to one another, has yet to be performed.

    Purpose: To perform a qualitative and quantitative anatomic and radiographic evaluation of the medial patellofemoral ligament (MPFL), medial patellotibial ligament (MPTL), medial patellomeniscal ligament (MPML), and medial quadriceps tendon femoral ligament (MQTFL) attachment sites, with attention to their relationship to pertinent osseous and soft tissue landmarks.

    Study Design: Descriptive laboratory study. Read More

    Clinical Outcomes of Knee Osteoarthritis Treated With an Autologous Protein Solution Injection: A 1-Year Pilot Double-Blinded Randomized Controlled Trial.
    Am J Sports Med 2017 Oct 1:363546517732734. Epub 2017 Oct 1.
    NanoBiotechnology Laboratory, Rizzoli Orthopaedic Institute, Bologna, Italy.
    Background: Osteoarthritis (OA) is a debilitating disease resulting in substantial pain and functional limitations. A novel blood derivative has been developed to concentrate both growth factors and antagonists of inflammatory cytokines, with promising preliminary findings in terms of safety profile and clinical improvement.

    Purpose: To investigate if one intra-articular injection of autologous protein solution (APS) can reduce pain and improve function in patients affected by knee OA in a multicenter, randomized, double-blind, saline-controlled study. Read More

    Predictors of Poor Clinical Outcome After Arthroscopic Labral Preservation, Capsular Plication, and Cam Osteoplasty in the Setting of Borderline Hip Dysplasia.
    Am J Sports Med 2017 Oct 1:363546517730583. Epub 2017 Oct 1.
    Wakamatsu Hospital of University of Occupational and Environmental Health, Kitakyusyu, Japan.
    Background: Borderline developmental dysplasia of the hip (BDDH) is frequently diagnosed concurrently with cam impingement. While hip arthroscopy has advanced the treatment of hip joint pathology, including femoroacetabular impingement (FAI), arthroscopic treatment for FAI in the setting of BDDH remains a challenge amid a subset of patients. The risk factors of poor clinical results after hip arthroscopic labral preservation and FAI corrections in the setting of BDDH patients have not been well established. Read More

    Improved Chondrotoxic Profile of Liposomal Bupivacaine Compared With Standard Bupivacaine After Intra-articular Infiltration in a Porcine Model.
    Am J Sports Med 2017 Oct 1:363546517732558. Epub 2017 Oct 1.
    Department of Orthopaedic Surgery, Dwight D. Eisenhower Army Medical Center, Fort Gordon, Georgia, USA.
    Background: Increasingly, liposomal bupivacaine is being used with multimodal pain management strategies. In vitro investigations have shown decreased chondrotoxicity profiles for liposomal bupivacaine; however, there is no evidence regarding its in vivo effects. Hypothesis/Purpose: This study sought to investigate the in vivo chondrotoxicity of liposomal bupivacaine, hypothesizing that there would be increased chondrocyte viability after exposure to liposomal bupivacaine when compared with standard bupivacaine. Read More

    Low Bone Mineral Density in Male Athletes Is Associated With Bone Stress Injuries at Anatomic Sites With Greater Trabecular Composition.
    Am J Sports Med 2017 Oct 1:363546517730584. Epub 2017 Oct 1.
    Division of Sports Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.
    Background: While sports participation is often associated with health benefits, a subset of athletes may develop impaired bone health. Bone stress injuries (BSIs) are a common overuse injury in athletes; site of injury has been shown to relate to underlying bone health in female athletes. Hypothesis/Purpose: This case series characterizes the association of type of sports participation and anatomic site of BSIs with low bone mineral density (BMD), defined as BMD Z-score <-1. Read More

    Patellar Instability Management: A Survey of the International Patellofemoral Study Group.
    Am J Sports Med 2017 Oct 1:363546517732045. Epub 2017 Oct 1.
    Sports Medicine and Shoulder Service, Hospital for Special Surgery, New York, New York, USA.
    Background: Although patellofemoral instability is among the most prevalent knee disorders, the management of patients with this condition is complex and remains variable, given the lack of long-term, high-level clinical outcome studies to compare various operative and nonoperative modalities.

    Purpose: To discover a consensus within treatment controversies in patellofemoral instability among experienced knee surgeons with a specific interest in the patellofemoral joint.

    Study Design: Expert opinion; Level of evidence, 5. Read More

    High Rates of Osteoarthritis Develop After Anterior Cruciate Ligament Surgery: An Analysis of 4108 Patients.
    Am J Sports Med 2017 Sep 1:363546517730072. Epub 2017 Sep 1.
    Steadman Philippon Research Institute, Vail, Colorado, USA.
    Background: Posttraumatic osteoarthritis (PTOA) after anterior cruciate ligament (ACL) reconstruction ultimately translates into a large economic effect on the health care system owing to the young ages of this population. Purpose/Hypothesis: The purposes were to perform a meta-analysis to determine the prevalence of osteoarthritis after an ACL reconstruction, examining the effects of length of time after surgery, preoperative time interval from injury to surgery, and patient age at the time of surgery. It was hypothesized that the prevalence of PTOA increased with time from surgery and that increased time from injury to surgery and age were also risk factors for the development of PTOA. Read More

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