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American Journal of Sports Medicine

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https://www.readbyqxmd.com/read/29144772/subchondral-bone-degradation-after-microfracture-for-osteochondral-lesions-of-the-talus-an-mri-analysis
#1
Yoshiharu Shimozono, Max Coale, Youichi Yasui, Amanda O'Halloran, Timothy W Deyer, John G Kennedy
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29144771/bursal-sided-rotator-cuff-tears-simple-versus-everted-type
#2
Hwan Jin Kim, Jung Youn Kim, Young Moon Kee, Yong Girl Rhee
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. METHODS: Two groups of patients with bursal-sided PTRCTs (simple type, 25 shoulders; everted type, 25 shoulders) were enrolled...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29140738/do-outcomes-of-osteochondral-allograft-transplantation-differ-based-on-age-and-sex-a-comparative-matched-group-analysis
#3
Rachel M Frank, Eric J Cotter, Simon Lee, Sarah Poland, Brian J Cole
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. METHODS: A review of prospectively collected data of consecutive patients who underwent OCA by a single surgeon with a minimum follow-up of 2 years was conducted...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29135288/selective-debridement-with-labral-preservation-using-narrow-indications-in-the-hip-minimum-5-year-outcomes-with-a-matched-pair-labral-repair-control-group
#4
Austin W Chen, Leslie C Yuen, Victor Ortiz-Declet, Jody Litrenta, David R Maldonado, Benjamin G Domb
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. It was hypothesized that, with narrow indications, SDLP would produce statistically improved patient-reported outcome (PRO) scores, comparable with those of a matched-pair labral repair control group...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29135276/effects-of-the-new-york-state-concussion-management-and-awareness-act-lystedt-law-on-concussion-related-emergency-health-care-utilization-among-adolescents-2005-2015
#5
David R Baker, Erin R Kulick, Amelia K Boehme, James M Noble
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. It was hypothesized that New York concussion legislation would have a significant temporal effect on EDCHVs...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29135275/the-effects-of-playing-multiple-high-school-sports-on-national-basketball-association-players-propensity-for-injury-and-athletic-performance
#6
Caitlin Rugg, Adarsh Kadoor, Brian T Feeley, Nirav K Pandya
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29135269/return-to-play-after-hip-arthroscopic-surgery-for-femoroacetabular-impingement-in-professional-soccer-players
#7
Renato Locks, Hajime Utsunomiya, Karen K Briggs, Shannen McNamara, Jorge Chahla, Marc J Philippon
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29125920/frontal-plane-knee-mechanics-and-early-cartilage-degeneration-in-people-with-anterior-cruciate-ligament-reconstruction-a-longitudinal-study
#8
Deepak Kumar, Favian Su, Daniel Wu, Valentina Pedoia, Lauren Heitkamp, C Benjamin Ma, Richard B Souza, Xiaojuan Li
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29125919/autologous-chondrocyte-implantation-sandwich-technique-compared-with-autologous-bone-grafting-for-deep-osteochondral-lesions-in-the-knee
#9
Tom Minas, Takahiro Ogura, Jeff Headrick, Tim Bryant
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29116863/hypothermia-promotes-cell-protective-and-chondroprotective-effects-after-blunt-cartilage-trauma
#10
Jana Riegger, Madeleine Zimmermann, Helga Joos, Thomas Kappe, Rolf E Brenner
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. STUDY DESIGN: Controlled laboratory study...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29112467/meniscectomy-and-resultant-articular-cartilage-lesions-of-the-knee-among-prospective-national-football-league-players-an-imaging-and-performance-analysis
#11
Jorge Chahla, Mark E Cinque, Jonathan A Godin, George Sanchez, George F Lebus, James M Whalen, Mark D Price, Nicholas I Kennedy, Gilbert Moatshe, Robert F LaPrade, Matthew T Provencher
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29100468/treatment-of-knee-osteochondritis-dissecans-with-a-cell-free-biomimetic-osteochondral-scaffold-clinical-and-imaging-findings-at-midterm-follow-up
#12
Francesco Perdisa, Elizaveta Kon, Andrea Sessa, Luca Andriolo, Maurizio Busacca, Maurilio Marcacci, Giuseppe Filardo
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29100004/autologous-chondrocyte-implantation-in-osteoarthritic-surroundings-tnf%C3%AE-and-its-inhibition-by-adalimumab-in-a-knee-specific-bioreactor
#13
Robert Ossendorff, Sibylle Grad, Martin J Stoddart, Mauro Alini, Hagen Schmal, Norbert Südkamp, Gian M Salzmann
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. PURPOSE: To investigate the effects of tumor necrosis factor α (TNFα) and its potential inhibition by adalimumab on cartilage regeneration in an in vitro model of ACI...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29100001/effects-of-anterior-closing-wedge-tibial-osteotomy-on-anterior-cruciate-ligament-force-and-knee-kinematics
#14
Kent T Yamaguchi, Edward C Cheung, Keith L Markolf, Daniel V Boguszewski, Justin Mathew, David R McAllister, Frank A Petrigliano
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...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29099618/intra-articular-mesenchymal-stem-cell-therapy-for-the-human-joint-a-systematic-review
#15
James A McIntyre, Ian A Jones, Bo Han, C Thomas Vangsness
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. PURPOSE: To provide clinicians with a comprehensive overview of the entire body of the current human literature investigating the safety and efficacy of intra-articular mesenchymal stem cell (MSC) therapy in all joints...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29095655/efficacy-of-a-prevention-program-for-medial-elbow-injuries-in-youth-baseball-players
#16
Jun Sakata, Emi Nakamura, Tatsuhiro Suzuki, Makoto Suzukawa, Atsushi Akaike, Kuniaki Shimizu, Norikazu Hirose
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. METHODS: Youth baseball players, 8 to 11 years old, without a history of elbow and shoulder pain, were allocated to either the intervention (n = 136) or control (n = 169) group...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29083227/variation-in-the-medial-patellofemoral-ligament-origin-in-the-skeletally-immature-knee-an-anatomic-study
#17
Kevin G Shea, W Duncan Martinson, Peter C Cannamela, Connor G Richmond, Peter D Fabricant, Allen F Anderson, John D Polousky, Theodore J Ganley
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. STUDY DESIGN: Descriptive laboratory study. METHODS: Thirty-six cadaveric specimens between 2 and 11 years old were dissected and examined (29 male and 7 female)...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29068725/calf-muscle-performance-deficits-remain-7-years-after-an-achilles-tendon-rupture
#18
Annelie Brorsson, Karin Grävare Silbernagel, Nicklas Olsson, Katarina Nilsson Helander
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. A secondary aim was to evaluate whether improvement in calf muscle performance continued after the 2-year follow-up...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29065279/gait-retraining-for-the-reduction-of-injury-occurrence-in-novice-distance-runners-1-year-follow-up-of-a-randomized-controlled-trial
#19
Zoe Y S Chan, Janet H Zhang, Ivan P H Au, Winko W An, Gary L K Shum, Gabriel Y F Ng, Roy T H Cheung
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. PURPOSE: To examine vertical loading rates before and after a gait retraining program and assess the effectiveness of the program in reducing the occurrence of running-related injury across a 12-month observation period...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29065275/multicenter-analysis-of-midterm-clinical-outcomes-of-arthroscopic-labral-repair-in-the-hip-minimum-5-year-follow-up
#20
Mario Hevesi, Aaron J Krych, Nick R Johnson, John M Redmond, David E Hartigan, Bruce A Levy, Benjamin G Domb
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. STUDY DESIGN: Cohort study; Level of evidence, 3...
October 1, 2017: American Journal of Sports Medicine
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