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American Journal of Sports Medicine

Benedict U Nwachukwu, Kara Fields, Brenda Chang, Danyal H Nawabi, Bryan T Kelly, Anil S Ranawat
BACKGROUND: There is increasing interest in defining meaningful improvement in patient-reported outcomes. Knowledge of the thresholds and determinants for successful femoroacetabular impingement (FAI) outcomes is evolving. PURPOSE: To define preoperative outcome score thresholds and determine clinical/demographic patient factors predictive for achieving the minimal clinically important difference (MCID) after arthroscopic FAI surgery. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2...
October 20, 2016: American Journal of Sports Medicine
Elizabeth E Hibberd, Kevin G Laudner, Kristen L Kucera, David J Berkoff, Bing Yu, Joseph B Myers
BACKGROUND: Subacromial space distance and forward head and shoulder posture are common characteristics resulting from swim training. These alterations can cause abnormal scapular kinematics and positioning, potentially increasing compression of structures in the subacromial space and increasing the risk for the development of swimmer's shoulder. PURPOSE: To evaluate the effect of the swim training season on subacromial space distance and forward head and forward shoulder posture as well as to determine the relationship between these variables...
October 18, 2016: American Journal of Sports Medicine
Daniel W Griffin, Matthew J Kinnard, Peter M Formby, Michael P McCabe, Terrence D Anderson
BACKGROUND: The indications for hip preservation surgery have expanded to include treatment of hip pathology in older adults. While several studies have examined the efficacy of hip arthroscopy in the setting of osteoarthritis, there has been no review of outcomes in older adults. PURPOSE: To review the outcomes of hip arthroscopy in older adults and identify factors associated with treatment failures. STUDY DESIGN: Systematic review. METHODS: PubMed, EMBASE, and the Cochrane Library were searched through March 2016 for studies reporting outcomes of primary hip arthroscopy in patients older than 40 years...
October 18, 2016: American Journal of Sports Medicine
Angela Zissler, Peter Steinbacher, Reinhold Zimmermann, Stefan Pittner, Walter Stoiber, Arne C Bathke, Alexandra M Sänger
BACKGROUND: Muscle injuries are among the most common sports-related lesions in athletes; however, optimal treatment remains obscure. Extracorporeal shock wave therapy (ESWT) may be a promising approach in this context, because it has gained increasing importance in tissue regeneration in various medical fields. HYPOTHESIS: ESWT stimulates and accelerates regenerative processes of acute muscle injuries. STUDY DESIGN: Controlled laboratory study...
October 11, 2016: American Journal of Sports Medicine
Brett D Steineman, Samuel G Moulton, Tammy L Haut Donahue, Cristián A Fontboté, Christopher M LaPrade, Tyler R Cram, Chase S Dean, Robert F LaPrade
BACKGROUND: The anterolateral meniscal root (ALMR) has been reported to intricately insert underneath the tibial insertion of the anterior cruciate ligament (ACL). Previous studies have begun to evaluate the relationship between the insertion areas and the risk of iatrogenic injuries; however, the overlap of the insertions has yet to be quantified in the sagittal and coronal planes. PURPOSE: To investigate the insertions of the human tibial ACL and ALMR using scanning electron microscopy (SEM) and to quantify the overlap of the ALMR insertion in the coronal and sagittal planes...
October 11, 2016: American Journal of Sports Medicine
William J Warrender, Usman Ali M Syed, Sommer Hammoud, William Emper, Michael G Ciccotti, Joseph A Abboud, Kevin B Freedman
BACKGROUND: Effective postoperative pain management after shoulder arthroscopy is a critical component to recovery, rehabilitation, and patient satisfaction. PURPOSE: This systematic review provides a comprehensive overview of level 1 and level 2 evidence regarding postoperative pain management for outpatient arthroscopic shoulder surgery. STUDY DESIGN: Systematic review. METHODS: We performed a systematic review of the various modalities reported in the literature for postoperative pain control after outpatient shoulder arthroscopy and analyzed their outcomes...
October 11, 2016: American Journal of Sports Medicine
Michael M Bottros, Jacob D AuBuchon, Lauren N McLaughlin, David W Altchek, Karl A Illig, Robert W Thompson
No abstract text is available yet for this article.
September 23, 2016: American Journal of Sports Medicine
Jorge Chahla, Jacob D Mikula, Jason M Schon, Chase S Dean, Kimi D Dahl, Travis J Menge, Eduardo Soares, Travis Lee Turnbull, Robert F LaPrade, Marc J Philippon
BACKGROUND: Hip capsulotomy is routinely performed during arthroscopic surgery to achieve adequate exposure of the joint. Iatrogenic instability can result after hip arthroscopic surgery because of capsular insufficiency, which can be avoided with effective closure of the hip capsule. There is currently no consensus in the literature regarding the optimal quantity of sutures upon capsular closure to achieve maximal stability postoperatively. PURPOSE/HYPOTHESIS: The purpose of this study was to determine the failure torques of 1-, 2-, and 3-suture constructs for hip capsular closure to resist external rotation and extension after standard anterosuperior interportal capsulotomy (12 to 3 o'clock)...
September 22, 2016: American Journal of Sports Medicine
Clemens Gwinner, Andreas Weiler, Manoussos Roider, Frederik M Schaefer, Tobias M Jung
BACKGROUND: The reported failure rate after posterior cruciate ligament (PCL) reconstruction remains high. Previous studies have shown that the tibial slope (TS) influences sagittal plane laxity. Consequently, alterations of TS might have an effect on postoperative knee stability after PCL reconstruction. HYPOTHESIS: We hypothesized that flattening of TS is associated with increased posterior laxity after PCL reconstruction. STUDY DESIGN: Cohort study; Level of evidence 3...
September 20, 2016: American Journal of Sports Medicine
Daniel Norman, Andrew J Metcalfe, Timothy Barlow, Charles E Hutchinson, Peter J M Thompson, Timothy J W Spalding, Mark A Williams
BACKGROUND: The anatomy of the anterior cruciate ligament (ACL) has become the subject of much debate. There has been extensive study into attachment points of the native ligament, especially regarding the femoral attachment. Some of these studies have suggested that fibers in the ACL are of differing functional importance. Fibers with higher functional importance would be expected to exert larger mechanical stress on the bone. According to Wolff's law, cortical thickening would be expected in these areas...
September 20, 2016: American Journal of Sports Medicine
Mari Leppänen, Kati Pasanen, Urho M Kujala, Tommi Vasankari, Pekka Kannus, Sami Äyrämö, Tron Krosshaug, Roald Bahr, Janne Avela, Jarmo Perttunen, Jari Parkkari
BACKGROUND: Few prospective studies have investigated the biomechanical risk factors of anterior cruciate ligament (ACL) injury. PURPOSE: To investigate the relationship between biomechanical characteristics of vertical drop jump (VDJ) performance and the risk of ACL injury in young female basketball and floorball players. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: At baseline, a total of 171 female basketball and floorball players (age range, 12-21 years) participated in a VDJ test using 3-dimensional motion analysis...
September 16, 2016: American Journal of Sports Medicine
Christian Deml, Peter Kaiser, Wouter F van Leeuwen, Magdalena Zitterl, Simon A Euler
BACKGROUND: The J-shaped bone graft procedure is one of the recommended methods to reconstruct significant glenoid rim defects. PURPOSE: To evaluate long-term (minimum 10-year) clinical outcomes and show further details of the remodeling effects on the articular cavity of the glenoid after J-shaped bone grafting. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: A total of 14 patients treated with a J-shaped bone graft procedure were observed clinically...
September 15, 2016: American Journal of Sports Medicine
Camilo Partezani Helito, Julio Augusto do Prado Torres, Marcelo Batista Bonadio, José Aderval Aragão, Lucas Nogueira de Oliveira, Renato José Mendonça Natalino, José Ricardo Pécora, Gilberto Luis Camanho, Marco Kawamura Demange
BACKGROUND: The anterolateral ligament (ALL) of the knee has recently been described in detail. Most studies of the ALL have been conducted in adults; therefore, little is known about the anatomy and histology of the ALL in younger patients, and nothing is known about the fetal presence of the ALL. PURPOSE: To evaluate the ALL in human fetuses to determine its presence or absence and to describe its microscopic anatomy and histological features compared with the findings of studies conducted in adults...
September 13, 2016: American Journal of Sports Medicine
David M Levy, Benjamin D Kuhns, Rachel M Frank, Jeffrey S Grzybowski, Kirk A Campbell, Sara Brown, Shane J Nho
BACKGROUND: Femoroacetabular impingement (FAI) is most commonly diagnosed in athletes who sustain repetitive flexion loading to their hips. No studies to date have focused solely on patients' return-to-running ability after hip arthroscopy. PURPOSE: To evaluate patients' ability to return to running after hip arthroscopy for FAI and capsular plication. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Clinical data were retrospectively retrieved for 51 consecutive patients with FAI (22 men, 29 women) who had undergone hip arthroscopy for the treatment of FAI and identified themselves as recreational or competitive runners on intake forms...
September 12, 2016: American Journal of Sports Medicine
Matthew T Provencher, Hannah Kirby, Lucas S McDonald, Petar Golijanin, Daniel Gross, Kevin J Campbell, Lance LeClere, George Sanchez, Shawn Anthony, Anthony A Romeo
BACKGROUND: Pectoralis minor (PM) tightness has been linked to pain and dysfunction of the shoulder joint secondary to anterior tilt and internal rotation of the scapula, thus causing secondary impingement of the subacromial space. PURPOSE: To describe outcomes pertaining to nonoperative and operative treatment via surgical release of the PM tendon for pathologic PM tightness in an active population. STUDY DESIGN: Case series; Level of evidence, 4...
September 9, 2016: American Journal of Sports Medicine
Leela C Biant, Michiel Simons, Trudi Gillespie, Michael J McNicholas
BACKGROUND: Autologous chondrocyte implantation (ACI) is an effective method of repair of articular cartilage defects. It is a 2-stage operation, with the second stage most commonly performed via mini-arthrotomy. Arthroscopic ACI is gaining popularity, as it is less invasive and may accelerate early rehabilitation. However, handling and manipulation of the implant have been shown to cause chondrocyte cell death. PURPOSE: To assess the number and viability of cells delivered via an open versus arthroscopic approach in ACI surgery...
September 9, 2016: American Journal of Sports Medicine
Marie Askenberger, Per-Mats Janarv, Throstur Finnbogason, Elizabeth A Arendt
BACKGROUND: The incidence of primary lateral patellar dislocation (LPD) in children aged 9 to 14 years is 0.6 to 1.2 per 1000. Causation is assumed to be multifactorial, including anatomic variants of the patellofemoral (PF) joint that result in a higher risk of LPD. No publication has compared the morphology of the PF joint and anatomic patellar instability risk factors (APIFs) in a primary LPD population versus controls, defining children by skeletal maturity. PURPOSE: To characterize the PF morphology and APIFs (trochlear dysplasia, abnormal lateral patellar tilt, elevated tibial tubercle-trochlear groove [TT-TG] distance, patella alta) through magnetic resonance imaging (MRI) measurements in skeletally immature children with and without a primary LPD and to identify (potential) distinctive differences between these 2 groups...
September 9, 2016: American Journal of Sports Medicine
Jun Sakata, Emi Nakamura, Makoto Suzukawa, Atsushi Akaike, Kuniaki Shimizu
BACKGROUND: The physical risk factors for a medial elbow injury in junior baseball players are unknown. PURPOSE: To identify the risk factors for an initial medial elbow injury in junior baseball players. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: Junior baseball players (aged 6-12 years) without a history of elbow pain underwent a clinical assessment, ultrasonography, and physical function measurements before the baseball season started...
September 7, 2016: American Journal of Sports Medicine
Robert H Brophy, Linda J Sandell, Muhammad Farooq Rai
BACKGROUND: Meniscus tears are classified as traumatic or degenerative based on the tear pattern. There is little evidence demonstrating biological differences between the 2 tear types. HYPOTHESIS: Gene expression signatures in the injured meniscus are different between traumatic (vertical) and degenerative (complex, horizontal, or flap) tears. STUDY DESIGN: Controlled laboratory study. METHODS: Samples of the torn meniscus from the white-white zone were removed at the time of clinically indicated partial meniscectomy from 48 patients (37 with degenerative tears and 11 with traumatic tears)...
September 7, 2016: American Journal of Sports Medicine
Kaitlin C Neary, Matthew A Mormino, Hongmei Wang
BACKGROUND: In stress-positive, unstable supination-external rotation type 4 (SER IV) ankle fractures, implant selection for syndesmotic fixation is a debated topic. Among the available syndesmotic fixation methods, the metallic screw and the suture button have been routinely compared in the literature. In addition to strength of fixation and ability to anatomically restore the syndesmosis, costs associated with implant use have recently been called into question. PURPOSE: This study aimed to examine the cost-effectiveness of the suture button and determine whether suture button fixation is more cost-effective than two 3...
September 6, 2016: American Journal of Sports Medicine
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