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American Journal of Sports Medicine

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https://www.readbyqxmd.com/read/28056179/descriptive-characteristics-of-concussions-in-national-football-league-games-2010-2011-to-2013-2014
#1
Michael D Clark, Breton M Asken, Stephen W Marshall, Kevin M Guskiewicz
BACKGROUND: Despite a high reported incidence rate of concussion, little is known about the on-field characteristics of injurious head impacts in National Football League (NFL) games. PURPOSE: To characterize on-field features (location, player position, and time during game) and biomechanical features (anticipation status, closing distance, impact location and type) associated with concussions in NFL games over a 4-season period (2010-2011 to 2013-2014). STUDY DESIGN: Descriptive epidemiology study...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28075154/survivorship-after-meniscal-allograft-transplantation-according-to-articular-cartilage-status
#2
Bum-Sik Lee, Seong-Il Bin, Jong-Min Kim, Won-Kyeong Kim, Jun Weon Choi
BACKGROUND: Clinical outcomes after meniscal allograft transplantation (MAT) in arthritic knees are unclear, and objective estimates of graft survival according to the articular cartilage status have not been performed. HYPOTHESIS: MAT should provide clinical benefits in knees with high-grade cartilage damage, but their graft survivorship should be inferior to that in knees with low-grade chondral degeneration after MAT. STUDY DESIGN: Cohort study; Level of evidence, 3...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28068480/magnetic-resonance-imaging-characterization-and-clinical-outcomes-after-neocart-surgical-therapy-as-a-primary-reparative-treatment-for-knee-cartilage-injuries
#3
Devon E Anderson, Riley J Williams, Thomas M DeBerardino, Dean C Taylor, C Benjamin Ma, Marie S Kane, Dennis C Crawford
BACKGROUND: Autologous cartilage tissue implants, including the NeoCart implant, are intended to repair focal articular cartilage lesions. Short-term results from United States Food and Drug Administration (FDA) phase I and phase II clinical trials indicated that the NeoCart implant was safe when surgically applied as a cell-based therapy and efficacious compared with microfracture. HYPOTHESIS: Quantitative magnetic resonance imaging (MRI) analysis would reveal NeoCart tissue maturation through to 60-month follow-up...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28068159/suspensory-versus-aperture-fixation-of-a-quadrupled-hamstring-tendon-autograft-in-anterior-cruciate-ligament-reconstruction
#4
William M Browning, Melissa A Kluczynski, Christian Curatolo, John M Marzo
BACKGROUND: Hamstring grafts have become a popular choice for anterior cruciate ligament (ACL) reconstruction; however, the most effective means of fixation of these soft tissue grafts is unknown. PURPOSE: To determine whether suspensory or aperture fixation of hamstring tendon autografts provides better stability and clinical outcomes in ACL reconstruction. STUDY DESIGN: Meta-analysis. METHODS: A literature search of studies reporting single-bundle ACL reconstructions using 4-stranded hamstring tendon autografts with aperture or suspensory fixation with a minimum 24-month follow-up was conducted...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28061032/effects-of-platelet-rich-plasma-with-concomitant-use-of-a-corticosteroid-on-tenocytes-from-degenerative-rotator-cuff-tears-in-interleukin-1%C3%AE-induced-tendinopathic-conditions
#5
Chris Hyunchul Jo, Seung Yeon Lee, Kang Sup Yoon, Sue Shin
BACKGROUND: A corticosteroid injection is commonly used to treat tendinopathy, but it has been associated with negative effects on tendon homeostasis. Platelet-rich plasma (PRP) is known to have proliferative and anabolic effects as well as cytoprotective effects against corticosteroids on tenocytes. However, the combined effects of a corticosteroid and PRP on the anti-inflammatory, matrix synthesis, and cytoprotective potential of tenocytes in conditions simulating tendinopathy have not been investigated...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28056513/is-an-anterolateral-ligament-reconstruction-required-in-acl-reconstructed-knees-with-associated-injury-to-the-anterolateral-structures
#6
Frank R Noyes, Lauren E Huser, Darin Jurgensmeier, James Walsh, Martin S Levy
BACKGROUND: The effect of an anterolateral ligament (ALL) reconstruction on rotational knee stability and corresponding anterior cruciate ligament (ACL) graft forces using multiple knee loading conditions including the pivot-shift phenomenon has not been determined. PURPOSE: First, to determine the rotational stability and ACL graft forces provided by an anatomic bone-patellar tendon-bone ACL reconstruction in the ACL-deficient knee alone and with an associated ALL/iliotibial band (ITB) injury...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27940807/sex-based-differences-in-cognitive-deficits-and-symptom-reporting-among-acutely-concussed-adolescent-lacrosse-and-soccer-players
#7
Natalie K Sandel, Philip Schatz, Kenneth B Goldberg, Mary Lazar
BACKGROUND: Research on the acute effects of a concussion among lacrosse players is limited, and postconcussion patterns between male and female athletes have yet to be clearly established. Differences in the style of play and protective gear worn among male and female lacrosse players potentially confound a direct comparison of sex-based differences in this population. PURPOSE: To explore sex-based differences in postconcussive neurocognitive functioning and symptom reporting outcomes in concussed adolescent male and female lacrosse players compared with a group of soccer players...
December 9, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27940806/treatment-for-ulnar-neuritis-around-the-elbow-in-adolescent-baseball-players-factors-associated-with-poor-outcome
#8
Masahiro Maruyama, Hiroshi Satake, Masatoshi Takahara, Mikio Harada, Tomohiro Uno, Nariyuki Mura, Michiaki Takagi
BACKGROUND: Ulnar neuritis around the elbow is one of the injuries seen in throwing athletes. Outcomes of nonsurgical treatment and factors associated with failure outcomes have not been reported. PURPOSE: To investigate the outcomes of treatments for ulnar neuritis in adolescent baseball players. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: We assessed 40 male baseball players with a mean age of 15.0 years (range, 13-17 years) who presented with ulnar neuritis...
December 9, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27932332/the-anterolateral-capsule-of-the-knee-behaves-like-a-sheet-of-fibrous-tissue
#9
Daniel Guenther, Amir A Rahnemai-Azar, Kevin M Bell, Sebastián Irarrázaval, Freddie H Fu, Volker Musahl, Richard E Debski
BACKGROUND: The function of the anterolateral capsule of the knee has not been clearly defined. However, the contribution of this region of the capsule to knee stability in comparison with other anterolateral structures can be determined by the relative force that each structure carries during loading of the knee. PURPOSE/HYPOTHESIS: The purpose of this study was to determine the forces in the anterolateral structures of the intact and anterior cruciate ligament (ACL)-deficient knee in response to an anterior tibial load and internal tibial torque...
December 8, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27927616/safety-of-hip-anchor-insertion-from-the-midanterior-and-distal-anterolateral-portals-with-a-straight-drill-guide-a-cadaveric-study
#10
Ryan M Degen, Lazaros Poultsides, Stephanie W Mayer, Angela E Li, Struan H Coleman, Anil S Ranawat, Danyal H Nawabi, Bryan T Kelly
BACKGROUND: During arthroscopic labral refixation, suture anchors are typically inserted from either the midanterior (MA) portal or the distal anterolateral (DALA) portal; however, no studies have previously compared these techniques. PURPOSE/HYPOTHESIS: The purpose of this study was to compare acetabular rim accessibility and associated complication rates of anchor insertion from these portals. We hypothesized that rim access would be better from the DALA portal...
December 7, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27919916/posterior-meniscal-root-repairs-outcomes-of-an-anatomic-transtibial-pull-out-technique
#11
Robert F LaPrade, Lauren M Matheny, Samuel G Moulton, Evan W James, Chase S Dean
BACKGROUND: Outcomes after transtibial pull-out repair for posterior meniscal root tears remain underreported, and factors that may affect outcomes are unknown. PURPOSE/HYPOTHESIS: The purpose of this study was to compare patient-centered outcomes after transtibial pull-out repair for posterior root tears in patients <50 and ≥50 years of age. We hypothesized that improvement in function and activity level at minimum 2-year follow-up would be similar among patients <50 years of age compared with patients ≥50 years and among patients undergoing medial versus lateral root repairs...
December 5, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28106463/long-term-results-after-arthroscopic-repair-of-isolated-subscapularis-tears
#12
Gernot Seppel, Johannes E Plath, Christopher Völk, Wolfgang Seiberl, Stefan Buchmann, Simone Waldt, Andreas B Imhoff, Sepp Braun
BACKGROUND: Although some reports have presented short- to midterm results after arthroscopic repair of isolated subscapularis (SSC) tendon tears, long-term evaluation is still lacking. HYPOTHESIS: Long-term results after arthroscopic repair of isolated SSC tears are comparable with the functional and radiological short- to midterm outcomes described in the literature. STUDY DESIGN: Case series, Level of evidence, 4. METHODS: This study assessed 17 patients (5 females and 12 males; mean age, 45...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28060536/proprioception-in-patients-with-anterior-cruciate-ligament-tears
#13
Hyun-Jung Kim, Jin-Hyuck Lee, Dae-Hee Lee
BACKGROUND: Because of a reduction in the number of mechanoreceptors or alterations of their characteristics, anterior cruciate ligament (ACL) tears lead not only to mechanical instability but also to impaired proprioception. Purpose/Hypothesis: This study analyzed whether ACL tears cause a greater decrease in proprioception in injured than in uninjured knees. The hypothesis was that knee proprioception after ACL tears would decrease more in injured than in contralateral uninjured knees, regardless of the method used to measure knee proprioception...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28060534/is-it-necessary-to-repair-stable-ramp-lesions-of-the-medial-meniscus-during-anterior-cruciate-ligament-reconstruction
#14
Xin Liu, Hui Zhang, Hua Feng, Lei Hong, Xue-Song Wang, Guan-Yang Song
BACKGROUND: A special type of meniscal lesion involving the peripheral attachment of the posterior horn of the medial meniscus (PHMM), termed a "ramp lesion," is commonly associated with an anterior cruciate ligament (ACL) injury. However, its treatment is still controversial. Recently, stable ramp lesions treated with abrasion and trephination alone have been shown to have good clinical outcomes after ACL reconstruction. HYPOTHESIS: Stable ramp lesions treated with abrasion and trephination alone during ACL reconstruction will result in similar clinical outcomes compared with those treated with surgical repair...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28060533/morphological-distribution-of-the-anterior-inferior-iliac-spine-in-patients-with-and-without-hip-impingement
#15
George C Balazs, Benjamin C Williams, Christopher M Knaus, Daniel I Brooks, Jonathan F Dickens, Michael P McCabe, Terrence D Anderson
BACKGROUND: Subspinous impingement of the anterior inferior iliac spine (AIIS) on the femoral head-neck junction is increasingly recognized as a source of hip impingement. A classification system of AIIS morphology has previously been proposed that correlates with reduced hip motion and may predispose patients to subspinous hip impingement. PURPOSE: To examine the morphological distribution of AIIS types in patients with and without diagnosed hip impingement and correlate AIIS morphology to intraoperative findings at the time of surgery...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28056527/osteochondral-allograft-transplantation-of-the-knee
#16
Rachel M Frank, Simon Lee, David Levy, Sarah Poland, Maggie Smith, Nina Scalise, Gregory L Cvetanovich, Brian J Cole
BACKGROUND: Osteochondral allograft transplantation (OAT) is being performed with increasing frequency, and the need for reoperations is not uncommon. PURPOSE: To quantify survival for OAT and report findings at reoperations. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: A review of prospectively collected data of 224 consecutive patients who underwent OAT by a single surgeon with a minimum follow-up of 2 years was conducted...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28056523/the-tibial-tubercle-trochlear-groove-distance-is-greater-in-patients-with-patellofemoral-pain
#17
Victor R Carlson, Barry P Boden, Aricia Shen, Jennifer N Jackson, Lawrence Yao, Frances T Sheehan
BACKGROUND: The distance between the tibial tubercle (TT) and trochlear groove (TT-TG distance) is known to be greater in patients with patellar instability. However, the potential role and prevalence of pathological TT-TG distances in a large cohort of skeletally mature patients with isolated patellofemoral pain (PFP) are not clear. PURPOSE: To determine if the mean TT-TG distance is greater in patients with PFP, who lack a history of patellar dislocations, knee trauma, or osteoarthritis, relative to healthy controls...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28056183/cell-seeded-autologous-chondrocyte-implantation
#18
Andreas H Gomoll, Amy Phan, Marissa Mastrocola, Luiz Felipe Ambra, Nehal Shah
BACKGROUND: The use of autologous chondrocyte implantation (ACI) remains limited, even though multiple studies have demonstrated success rates exceeding 75%. The procedure is perceived as invasive and technically challenging, presenting barriers to more widespread adoption. Purpose/Hypothesis: The objective of this study was to investigate whether outcomes and the failure rate of a simplified ACI technique (cs-ACI) were comparable with those of the more complicated traditional technique of a chondrocyte suspension injected under a collagen membrane (cACI)...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28056178/is-there-any-benefit-in-anterior-cruciate-ligament-reconstruction-in-patients-older-than-60-years
#19
Cécile Toanen, Guillaume Demey, Panagiotis G Ntagiopoulos, Paolo Ferrua, David Dejour
BACKGROUND: Results of anterior cruciate ligament (ACL) reconstruction are traditionally excellent in younger and nonarthritic patients. During the past few decades, people older than 60 years have become more active than ever, with more demanding physical lifestyles. An increase also has been noted in active patients with diagnosed ACL injuries. More patients are requesting treatment for ACL deficiency in hopes of returning to preinjury levels of activity. PURPOSE: The aims of this study were to evaluate the results of ACL reconstruction in patients older than 60 years in terms of functional recovery, return to sports, and postoperative incidence of osteoarthritis and to compare their results with published results of different age groups...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28038316/association-of-the-female-athlete-triad-risk-assessment-stratification-to-the-development-of-bone-stress-injuries-in-collegiate-athletes
#20
Adam S Tenforde, Jennifer L Carlson, Audrey Chang, Kristin L Sainani, Rebecca Shultz, Jae Hyung Kim, Phil Cutti, Neville H Golden, Michael Fredericson
BACKGROUND: The female athlete triad (referred to as the triad) contributes to adverse health outcomes, including bone stress injuries (BSIs), in female athletes. Guidelines were published in 2014 for clinical management of athletes affected by the triad. PURPOSE: This study aimed to (1) classify athletes from a collegiate population of 16 sports into low-, moderate-, and high-risk categories using the Female Athlete Triad Cumulative Risk Assessment score and (2) evaluate the predictive value of the risk categories for subsequent BSIs...
December 1, 2016: American Journal of Sports Medicine
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