8,295 results match your criteria American Journal of Sports Medicine[Journal]


Does Anterior Cruciate Ligament Reconstruction Improve Functional and Radiographic Outcomes Over Nonoperative Management 5 Years After Injury?

Am J Sports Med 2018 Jun 1:363546518782698. Epub 2018 Jun 1.

Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware, USA.

Background: Current practice patterns for the management of anterior cruciate ligament (ACL) injury favor surgical reconstruction. However, long-term outcomes may not differ between patients completing operative and nonoperative treatment of ACL injury. Differences in outcomes between operative and nonoperative treatment of patients in the United States is largely unknown, as are outcomes in long-term strength and performance measures. Read More

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June 2018
1 Read

Therapeutic Effects of the Addition of Platelet-Rich Plasma to Bioimplants and Early Rehabilitation Exercise on Articular Cartilage Repair.

Am J Sports Med 2018 Jun 1:363546518780955. Epub 2018 Jun 1.

3D Printing Medical Research Center, China Medical University Hospital, Taichung City, Taiwan.

Background: Treating articular cartilage lesions is clinically challenging. However, whether the addition of autologous platelet-rich plasma (PRP) to bioimplants along with early rehabilitation exercise provides therapeutic effects and regenerates the osteochondral defect remains uninvestigated.

Hypothesis: The addition of PRP to a polylactic-co-glycolic acid (PLGA) scaffold along with continuous passive motion (CPM) in osteochondral defects may offer beneficial in situ microenvironment changes to facilitate hyaline cartilage and subchondral bone tissue repair. Read More

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Modulating Glucose Metabolism and Lactate Synthesis in Injured Mouse Tendons: Treatment With Dichloroacetate, a Lactate Synthesis Inhibitor, Improves Tendon Healing.

Am J Sports Med 2018 Jun 1:363546518778789. Epub 2018 Jun 1.

Division of Orthopaedic Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.

Background: Tendon injuries are common problems among athletes. Complete recovery of the mechanical structure and function of ruptured tendons is challenging. It has been demonstrated that upregulation of glycolysis and lactate production occurs in wounds, inflammation sites, and cancerous tumors, and these metabolic changes also control growth and differentiation of stem and progenitor cells. Read More

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June 2018
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The Importance of Comprehensive Cam Correction: Radiographic Parameters Are Predictive of Patient-Reported Outcome Measures at 2 Years After Hip Arthroscopy.

Am J Sports Med 2018 Jun 1:363546518780311. Epub 2018 Jun 1.

Division of Sports Medicine, Department of Orthopaedic Surgery, Wake Forest University, Winston-Salem, North Carolina, USA.

Background: The specific influence of preoperative and postoperative radiographic measurements on patient-reported outcome measures after hip arthroscopy for femoroacetabular impingement (FAI) remains unclear.

Purpose: To investigate the relationship between radiographic measurements and 2-year outcomes after hip arthroscopy for the treatment of FAI.

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

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June 2018
1 Read

Sports-Related Concussion Occurrence at Various Time Points During High School Athletic Events: Part 2.

Am J Sports Med 2018 Jun 1:363546518780225. Epub 2018 Jun 1.

Michigan State University, East Lansing, Michigan, USA.

Background: Sports-related concussion (SRC) injury rates, and identifying those athletes at the highest risk, have been a primary research focus. However, no studies have evaluated at which time point during an athletic event athletes are most susceptible to SRCs.

Purpose: To determine the clinical incidence of SRCs during the start, middle, and end of practice and competition among high school male and female athletes in the state of Michigan. Read More

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June 2018
1 Read

An Intra-articular Steroid Injection at 6 Weeks Postoperatively for Shoulder Stiffness After Arthroscopic Rotator Cuff Repair Does Not Affect Repair Integrity.

Am J Sports Med 2018 Jun 1:363546518777739. Epub 2018 Jun 1.

Department of Orthopedic Surgery, Busan Bumin Hospital, Busan, Republic of Korea.

Background: Shoulder stiffness is a common complication after arthroscopic rotator cuff repair. However, there is no consensus on the treatment of stiffness after repair. Although one treatment option is an intra-articular steroid injection, it may negatively affect repair integrity, and there is a paucity of literature regarding the timing of intra-articular injections for stiffness after repair and its effect on repair integrity. Read More

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In Search of the Spherical Femoroplasty: Cam Overresection Leads to Inferior Functional Scores Before and After Revision Hip Arthroscopic Surgery.

Am J Sports Med 2018 Jun 1:363546518779064. Epub 2018 Jun 1.

American Hip Institute, Westmont, Illinois, USA.

Background: Femoroplasty performed for the treatment of cam-type femoroacetabular impingement (FAI) has become a common procedure. Underresection may result in residual FAI. Conversely, overresection may disrupt the labral seal, which is responsible for chondroprotective fluid dynamics of the hip. Read More

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June 2018
1 Read

Rotator Cuff Matrix Augmentation and Interposition: A Systematic Review and Meta-analysis.

Am J Sports Med 2018 Jun 1:363546518774762. Epub 2018 Jun 1.

Division of Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA.

Background: Surgical management of rotator cuff tears is controversial and complex, ranging from nonoperative management to reverse shoulder arthroplasty.

Purpose: To systematically review and evaluate the outcomes of graft augmentation or interposition versus rotator cuff repair (RCR) alone and evaluate via meta-analysis whether the use of a graft leads to superior outcomes versus RCR alone.

Study Design: Systematic review and meta-analysis. Read More

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June 2018
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Forearm Flexor Injuries Among Major League Baseball Players: Epidemiology, Performance, and Associated Injuries.

Am J Sports Med 2018 Jun 1:363546518778252. Epub 2018 Jun 1.

Department of Orthopaedics, New York Presbyterian, Columbia University Medical Center, New York, New York, USA.

Background: Despite evidence highlighting the importance of the forearm flexor muscles of elite baseball players, no studies have reported on the epidemiology of flexor strains and their associated outcomes.

Purpose: To examine the incidence, associated injuries, and outcomes associated with forearm flexor injuries among major and minor league baseball players.

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

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Bone Bruise Patterns in Skeletally Immature Patients With Anterior Cruciate Ligament Injury: Shock-Absorbing Function of the Physis.

Am J Sports Med 2018 Jun 1:363546518777247. Epub 2018 Jun 1.

Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.

Background: Bone bruises are frequently found on magnetic resonance imaging (MRI) after anterior cruciate ligament (ACL) injury and have been related to the force associated with the trauma. Yet, little is known about the bone bruise distribution pattern of skeletally immature (SI) patients, as the presence of an open physis may play a role in energy dissipation given its unique structure.

Purpose: To describe and compare the location and distribution of tibial and femoral bone bruises, observed on MRI, between 2 groups of ACL-injured knees: the first group with an open physis and the second with a closed physis. Read More

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Physiologic Preoperative Knee Hyperextension Is a Predictor of Failure in an Anterior Cruciate Ligament Revision Cohort: A Report From the MARS Group.

Authors:
Daniel E Cooper Warren R Dunn Laura J Huston Amanda K Haas Kurt P Spindler Christina R Allen Allen F Anderson Thomas M DeBerardino Brett Brick A Lantz Barton Mann Michael J Stuart John P Albright Annunziato Ned Amendola Jack T Andrish Christopher C Annunziata Robert A Arciero Bernard R Bach Champ L Baker Arthur R Bartolozzi Keith M Baumgarten Jeffery R Bechler Jeffrey H Berg Geoffrey A Bernas Stephen F Brockmeier Robert H Brophy Charles A Bush-Joseph J Brad Butler V John D Campbell James L Carey James E Carpenter Brian J Cole Jonathan M Cooper Charles L Cox R Alexander Creighton Diane L Dahm Tal S David David C Flanigan Robert W Frederick Theodore J Ganley Elizabeth A Garofoli Charles J Gatt Steven R Gecha James Robert Giffin Sharon L Hame Jo A Hannafin Christopher D Harner Norman Lindsay Harris Keith S Hechtman Elliott B Hershman Rudolf G Hoellrich Timothy M Hosea David C Johnson Timothy S Johnson Morgan H Jones Christopher C Kaeding Ganesh V Kamath Thomas E Klootwyk Bruce A Levy C Benjamin Ma G Peter Maiers Robert G Marx Matthew J Matava Gregory M Mathien David R McAllister Eric C McCarty Robert G McCormack Bruce S Miller Carl W Nissen Daniel F O'Neill Brett D Owens Richard D Parker Mark L Purnell Arun J Ramappa Michael A Rauh Arthur C Rettig Jon K Sekiya Kevin G Shea Orrin H Sherman James R Slauterbeck Matthew V Smith Jeffrey T Spang Steven J Svoboda Timothy N Taft Joachim J Tenuta Edwin M Tingstad Armando F Vidal Darius G Viskontas Richard A White James S Williams Michelle L Wolcott Brian R Wolf James J York Rick W Wright

Am J Sports Med 2018 Jun 1:363546518777732. Epub 2018 Jun 1.

Investigation performed at The Carrell Clinic, Dallas, Texas, USA; Department of Orthopaedics, Washington University School of Medicine, St Louis, Missouri, USA; Department of Orthopaedics and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, USA; and Reedsburg Area Medical Center, Reedsburg, Wisconsin, USA.

Background: The occurrence of physiologic knee hyperextension (HE) in the revision anterior cruciate ligament reconstruction (ACLR) population and its effect on outcomes have yet to be reported. Hypothesis/Purpose: The prevalence of knee HE in revision ACLR and its effect on 2-year outcome were studied with the hypothesis that preoperative physiologic knee HE ≥5° is a risk factor for anterior cruciate ligament (ACL) graft rupture.

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

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June 2018
2 Reads

Borderline Glenoid Bone Defect in Anterior Shoulder Instability: Latarjet Procedure Versus Bankart Repair.

Am J Sports Med 2018 Jun 1:363546518776978. Epub 2018 Jun 1.

Shoulder and Elbow Clinic, Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.

Background: The optimal procedure for anterior shoulder instability with a borderline (15%-20%) bone defect on the anterior rim of the glenoid is still controversial.

Purpose: To compare the clinical outcome and recurrence rate between the arthroscopic Bankart repair and Latarjet procedure among patients with recurrent anterior shoulder instability and a borderline glenoid bone defect.

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

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June 2018
1 Read

Sex Differences in the Clinical Incidence of Concussions, Missed School Days, and Time Loss in High School Student-Athletes: Part 1.

Am J Sports Med 2018 Jun 1:363546518778251. Epub 2018 Jun 1.

Michigan State University, East Lansing, Michigan, USA.

Background: Sports-related concussion (SRC) injury rates are well established in collegiate athletics through epidemiological studies using the National Collegiate Athletic Association Injury Surveillance System. However, few studies have examined sex differences, time loss, and missed school days in high school athletes, especially at the state level.

Purpose: To identify sex differences in the clinical incidence of SRCs, missed school days, and time loss in high school student-athletes. Read More

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Effect of the Containment Type on Clinical Outcomes in Osteochondral Lesions of the Talus Treated With Autologous Osteochondral Transplantation.

Am J Sports Med 2018 Jun 1:363546518776659. Epub 2018 Jun 1.

Hospital for Special Surgery, New York, New York, USA.

Background: Uncontained-type osteochondral lesions of the talus (OLTs) have been shown to have inferior clinical outcomes after treatment with bone marrow stimulation. While autologous osteochondral transplantation (AOT) is indicated for larger lesions, no study has reported on the prognostic significance of the containment of OLTs treated with the AOT procedure.

Purpose: To clarify the effect of the containment of OLTs on clinical and radiological outcomes in patients who underwent AOT for OLTs. Read More

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High Rate of Return to High-Intensity Interval Training After Arthroscopic Management of Femoroacetabular Impingement Syndrome.

Am J Sports Med 2018 Jun 1:363546518776638. Epub 2018 Jun 1.

Rush University Medical Center, Chicago, Illinois, USA.

Background: Since the inception of CrossFit in 2000, the popularity of high-intensity interval training (HIIT) in the United States has risen dramatically. While HIIT is a highly efficient exercise for weight loss and improved conditioning, some literature reports injuries in up to 34% of HIIT participants. We sought to evaluate the functional and sports-specific results of hip arthroscopic surgery in recreational HIIT participants. Read More

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Validation of Noncontact Anterior Cruciate Ligament Tears Produced by a Mechanical Impact Simulator Against the Clinical Presentation of Injury.

Am J Sports Med 2018 Jun 1:363546518776621. Epub 2018 Jun 1.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.

Background: Anterior cruciate ligament (ACL) injuries are catastrophic events that affect athletic careers and lead to long-term degenerative knee changes. As injuries are believed to occur within the first 50 milliseconds after initial contact during a rapid deceleration task, impact simulators that rapidly deliver impulse loads to cadaveric specimens have been developed. However, no impactor has reproducibly and reliably created ACL injures in a distribution that mimics clinical observation. Read More

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Comparison of Head Impact Exposure Between Male and Female High School Ice Hockey Athletes.

Am J Sports Med 2018 Jun 1:363546518777244. Epub 2018 Jun 1.

Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan, USA.

Background: Concussion incidence rates are higher among female than male athletes in sports played by both sexes. Biomechanical factors may play a role in observed sex-based differences in concussion incidence.

Purpose: To compare head impact counts and magnitudes during sports participation between male and female high school ice hockey athletes. Read More

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Ready or Not.

Authors:
Bruce Reider

Am J Sports Med 2018 Jun;46(7):1542-1544

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Primary Circumferential Acetabular Labral Reconstruction: Achieving Outcomes Similar to Primary Labral Repair Despite More Challenging Patient Characteristics.

Am J Sports Med 2018 May 1:363546518775425. Epub 2018 May 1.

Washington Orthopaedics and Sports Medicine, Washington, DC, USA.

Background: Treatment of acetabular labral tears with moderate or severe intrasubstance damage or segmental defects remains a substantial challenge. Circumferential labral reconstruction with iliotibial band allograft is a relatively new technique that has been proposed to restore stability and eliminate high-stress junction points.

Purpose: To compare outcomes between hips treated with primary allograft circumferential labral reconstruction and primary labral repair. Read More

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Effect of Meniscocapsular and Meniscotibial Lesions in ACL-Deficient and ACL-Reconstructed Knees: A Biomechanical Study.

Am J Sports Med 2018 May 1:363546518774315. Epub 2018 May 1.

The Steadman Clinic, Vail, Colorado, USA.

Background: Ramp lesions were initially defined as a tear of the peripheral attachment of the posterior horn of the medial meniscus at the meniscocapsular junction. The separate biomechanical roles of the meniscocapsular and meniscotibial attachments of the posterior medial meniscus have not been fully delineated.

Purpose: To evaluate the biomechanical effects of meniscocapsular and meniscotibial lesions of the posterior medial meniscus in anterior cruciate ligament (ACL)-deficient and ACL-reconstructed knees and the effect of repair of ramp lesions. Read More

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Operative Repair of Medial Patellofemoral Ligament Injury Versus Knee Brace in Children With an Acute First-Time Traumatic Patellar Dislocation: A Randomized Controlled Trial.

Am J Sports Med 2018 May 1:363546518770616. Epub 2018 May 1.

Department of Women's and Children's Health, Karolinska Institutet, Solna, Sweden.

Background: A lateral patellar dislocation (LPD) is the most common traumatic knee injury with hemarthrosis in children. The redislocation rate is high. Varying operative and nonoperative treatments have been advocated with no consensus on the best treatment. Read More

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Interference Screw Versus Suture Endobutton Fixation of a Fiber-Reinforced Meniscus Replacement Device in a Human Cadaveric Knee Model.

Am J Sports Med 2018 May 1:363546518773737. Epub 2018 May 1.

Department of Orthopaedic Surgery, Robert Wood Johnson Medical School, Rutgers Biomedical and Health Sciences, New Brunswick, New Jersey, USA.

Background: Meniscal lesions represent one of the most common intra-articular knee injuries. Meniscus replacement devices are needed to restore load distribution and knee stability after meniscectomy. Fixation of these devices is crucial to the generation of hoop stresses and the distribution of loads in the joint. Read More

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May 2018
1 Read

Career Length and Performance Among Professional Baseball Players Returning to Play After Hip Arthroscopy.

Am J Sports Med 2018 May 1:363546518775420. Epub 2018 May 1.

The Steadman Clinic, Vail, Colorado, USA.

Background: Hip arthroscopy has been shown to be effective for management of symptomatic femoroacetabular impingement (FAI) in professional athletes; however, it is unclear how hip arthroscopy affects career length and performance when professional baseball players return to play.

Purpose: To determine the career length, performance, and return-to-play rates of professional baseball players after undergoing arthroscopy for symptomatic FAI.

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

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Changes in the Neurovascular Anatomy of the Shoulder After an Open Latarjet Procedure: Defining a Surgical Safe Zone.

Am J Sports Med 2018 May 1:363546518773309. Epub 2018 May 1.

Steadman Philippon Research Institute, Vail, Colorado, USA.

Background: Although previous literature has described the relevant anatomy for an open anterior Bankart approach of the shoulder, there is little known regarding the anatomic relationship changes in the neurovascular structures after an open Latarjet procedure.

Purpose: To define the neurovascular anatomy of the native shoulder in relation to the coracoid and to define the anatomy after the Latarjet procedure in relation to the glenoid to determine distances to these neurovascular structures with and without neurolysis of the musculocutaneous nerve (MCN) from the conjoint tendon.

Study Design: Descriptive laboratory study. Read More

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Effects of TGF-β Overexpression via rAAV Gene Transfer on the Early Repair Processes in an Osteochondral Defect Model in Minipigs.

Am J Sports Med 2018 May 1:363546518773709. Epub 2018 May 1.

Center of Experimental Orthopaedics, Saarland University Medical Center, Homburg/Saar, Germany.

Background: Application of the chondrogenic transforming growth factor beta (TGF-β) is an attractive approach to enhance the intrinsic biological activities in damaged articular cartilage, especially when using direct gene transfer strategies based on the clinically relevant recombinant adeno-associated viral (rAAV) vectors.

Purpose: To evaluate the ability of an rAAV-TGF-β construct to modulate the early repair processes in sites of focal cartilage injury in minipigs in vivo relative to control (reporter lacZ gene) vector treatment.

Study Design: Controlled laboratory study. Read More

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Effects of Bone Incorporation After Arthroscopic Stabilization Surgery for Bony Bankart Lesion Based on Preoperative Glenoid Defect Size.

Am J Sports Med 2018 May 1:363546518773317. Epub 2018 May 1.

Department of Orthopedic Surgery, College of Medicine, Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea.

Background: Recurrent shoulder instability occurs more frequently after soft tissue surgery when the glenoid defect is greater than 20%. However, for lesions less than 20%, no scientific guidance is available regarding what size of bone fragments may affect shoulder functional restoration after bone incorporation. Purpose/Hypothesis: The purpose was to analyze how preoperative glenoid defect size and bone fragment incorporation alter postoperative clinical outcomes, we compared the functional outcomes of shoulders with and without bony Bankart lesion. Read More

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May 2018
4 Reads

A 2-Year Prospective Cohort Study of Overuse Running Injuries: The Runners and Injury Longitudinal Study (TRAILS).

Am J Sports Med 2018 May 1:363546518773755. Epub 2018 May 1.

Military Performance Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts, USA.

Background: The National Center for Injury Prevention and Control, noting flaws in previous running injury research, called for more rigorous prospective designs and comprehensive analyses to define the origin of running injuries.

Purpose: To determine the risk factors that differentiate recreational runners who remain uninjured from those diagnosed with an overuse running injury during a 2-year observational period.

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

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Season-Ending Shoulder Injuries in the National Collegiate Athletic Association: Data From the NCAA Injury Surveillance Program, 2009-2010 Through 2013-2014.

Am J Sports Med 2018 May 1:363546518773062. Epub 2018 May 1.

Department of Orthopaedics, Warren Alpert Medical School of Brown University / Rhode Island Hospital, Providence, Rhode Island, USA.

Background: Examination of the incidence of shoulder season-ending injury (SEI) in the collegiate athlete population is limited.

Purpose: To determine the incidence of shoulder SEI in the National Collegiate Athletic Association (NCAA) and to investigate the risk factors for a shoulder injury ending an athlete's season.

Study Design: Descriptive epidemiology study. Read More

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Epidemiology of Elbow Ulnar Collateral Ligament Injuries Among Baseball Players: National Collegiate Athletic Association Injury Surveillance Program, 2009-2010 Through 2013-2014.

Am J Sports Med 2018 May 1:363546518773314. Epub 2018 May 1.

Department of Orthopaedic Surgery, Warren Alpert School of Medicine, Brown University, Providence, Rhode Island, USA.

Background: Injuries to the ulnar collateral ligament (UCL) of the elbow are of major concern in baseball; however, the epidemiology of these injuries among National Collegiate Athletic Association (NCAA) athletes is poorly described.

Purpose: To determine the incidence of UCL injuries in NCAA baseball and investigate the risk factors involved.

Study Design: Descriptive epidemiology study. Read More

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May 2018
1 Read

Hamstring and Ankle Flexibility Deficits Are Weak Risk Factors for Hamstring Injury in Professional Soccer Players: A Prospective Cohort Study of 438 Players Including 78 Injuries.

Am J Sports Med 2018 May 1:363546518773057. Epub 2018 May 1.

Department of Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium.

Background: Hamstring injuries remain a significant injury burden in sports such as soccer that involve high-speed running. It has repeatedly been identified as the most common noncontact injury in elite male soccer, representing 12% of all injuries. As the incidence of hamstring injuries remains high, investigations are aimed at better understanding how to prevent hamstring injuries. Read More

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Platelet-Rich Plasma Releasate Promotes Regeneration and Decreases Inflammation and Apoptosis of Injured Skeletal Muscle.

Am J Sports Med 2018 May 1:363546518771076. Epub 2018 May 1.

Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Linkou, Taoyuan City, Taiwan.

Background: Platelet-rich plasma (PRP) contains various cytokines and growth factors that may be beneficial to the healing process of injured muscle. Based on the authors' previous study, PRP releasate can promote proliferation and migration of skeletal muscle cells in vitro, so animal studies are performed to support the use of PRP to treat muscle injury in vivo.

Purpose: To investigate the effect of PRP releasate on regeneration of injured muscle, as well as its effect on inflammatory reaction and cell apoptosis, in the early stages of the muscle-healing process. Read More

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May 2018
1 Read

Getting Hit by Pitch in Professional Baseball: Analysis of Injury Patterns, Risk Factors, Concussions, and Days Missed for Batters.

Am J Sports Med 2018 May 1:363546518773048. Epub 2018 May 1.

Santa Clara University, Santa Clara, California, USA.

Background: Although batters are frequently hit by pitch (HBP) in baseball, the effect of HBP injuries remains undefined in the literature.

Purpose: To determine the effect of HBP injuries in terms of time out of play, injury patterns resulting in the greatest time out of play, and the value of protective gear such as helmets and elbow pads.

Study Design: Descriptive laboratory study. Read More

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Return-to-Play and Performance Outcomes of Professional Athletes in North America After Hip Arthroscopy From 1999 to 2016.

Am J Sports Med 2018 May 1:363546518773080. Epub 2018 May 1.

Department of Orthopaedic Surgery, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA.

Background: The effect of hip arthroscopy on athletic performance compared with preinjury levels for professional athletes in different sports remains unknown. In addition, while return rates have been reported for professional baseball, football, and hockey players, return rates have not been reported for professional basketball players.

Hypothesis: Professional athletes in 4 major North American sports would be able to return to their sport and preoperative level of performance at a high rate after arthroscopic hip surgery. Read More

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Does Anterior Cruciate Ligament Reconstruction Affect the Outcome of Osteochondral Allograft Transplantation? A Matched Cohort Study With a Mean Follow-up of 6 Years.

Am J Sports Med 2018 May 1:363546518767636. Epub 2018 May 1.

Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, California, USA.

Background: Few studies have evaluated the influence of anterior cruciate ligament (ACL) reconstruction on the outcome of cartilage repair. Hypothesis/Purpose: The purpose was to investigate the association between ACL reconstruction and functional outcomes after osteochondral allograft (OCA) transplantation. The hypothesis was that patients treated with OCA transplantation who had a history of ACL reconstruction would have inferior clinical outcomes and lower osteochondral graft survivorship when compared with a matched group of patients undergoing OCA transplantation without a history of ACL reconstruction. Read More

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Bone Marrow Stimulation Technique Augmented by an Ultrapurified Alginate Gel Enhances Cartilage Repair in a Canine Model.

Am J Sports Med 2018 May 1:363546518770436. Epub 2018 May 1.

Department of Orthopaedic Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.

Background: The optimal treatment for a medium- or large-sized cartilage lesion is still controversial. Since an ultrapurified alginate (UPAL) gel enhances cartilage repair in animal models, this material is expected to improve the efficacy of the current treatment strategies for cartilage lesions.

Hypothesis: The bone marrow stimulation technique (BMST) augmented by UPAL gel can induce hyaline-like cartilage repair. Read More

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The V-Shaped Distal Triceps Tendon Repair: A Comparative Biomechanical Analysis.

Am J Sports Med 2018 May 1:363546518771359. Epub 2018 May 1.

Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany.

Background: Restoring footprint anatomy, minimizing gap formation, and maximizing the strength of distal triceps tendon repairs are essential factors for a successful healing process and return to sport.

Hypothesis: The novel V-shaped distal triceps tendon repair technique with unicortical button fixation closely restores footprint anatomy, provides minimal gap formation and high ultimate failure load, and minimizes iatrogenic fracture risk in acute/subacute distal triceps tendon tears.

Study Design: Controlled laboratory study. Read More

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May 2018
1 Read

Adjustable-Loop Femoral Cortical Suspensory Fixation for Patellar Tendon Anterior Cruciate Ligament Reconstruction: A Time Zero Biomechanical Comparison With Interference Screw Fixation.

Am J Sports Med 2018 May 1:363546518771365. Epub 2018 May 1.

Duke Sports Science Institute, Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, North Carolina, USA.

Background: Adjustable-loop cortical buttons for femoral fixation of bone-tendon-bone grafts have potential advantages over interference screw fixation; however, these devices have not been benchmarked biomechanically against interference screws. Purpose/Hypothesis: The purpose was to compare the time zero biomechanical properties of commercially available, adjustable-loop cortical button and metallic interference screws for femoral fixation of bone-tendon-bone grafts. It was hypothesized that no significant differences would be found in biomechanical properties between fixation techniques. Read More

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A Rotator Cuff Tear Concomitant With Shoulder Stiffness Is Associated With a Lower Retear Rate After 1-Stage Arthroscopic Surgery.

Am J Sports Med 2018 May 1:363546518768813. Epub 2018 May 1.

Investigation performed at Busan Bumin Hospital, Busan, Republic of Korea.

Background: Few studies have reported on the radiological characteristics and repair integrity of coexistent rotator cuff tears (RCTs) and shoulder stiffness after simultaneous arthroscopic rotator cuff repair and capsular release.

Purpose: To evaluate the radiological characteristics and repair integrity of 1-stage arthroscopic surgery of RCTs concomitant with shoulder stiffness.

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

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May 2018
1 Read

Fatty Infiltration Is a Prognostic Marker of Muscle Function After Rotator Cuff Tear.

Am J Sports Med 2018 May 1:363546518769267. Epub 2018 May 1.

Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA.

Background: Massive rotator cuff tears (RCTs) begin as primary tendon injuries and cause a myriad of changes in the muscle, including atrophy, fatty infiltration (FI), and fibrosis. However, it is unclear which changes are most closely associated with muscle function.

Purpose: To determine if FI of the supraspinatus muscle after acute RCT relates to short-term changes in muscle function. Read More

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Biomechanical Comparison of Anatomic and Extra-Anatomic Reconstruction Techniques Using Local Grafts for Chronic Instability of the Acromioclavicular Joint.

Am J Sports Med 2018 May 1:363546518770603. Epub 2018 May 1.

Biomechanics Laboratory, Department of Orthopedics, Mayo Clinic, Rochester, Minnesota, USA.

Background: Anatomic reconstruction techniques are increasingly used to address cases of acromioclavicular (AC) joint chronic instability. These usually involve an additional surgical site for autograft harvesting or an allograft.

Purpose: To describe a triple-bundle (TB) anatomic reconstruction using on-site autografts, the semiconjoint tendon (SCT) and the coracoacromial ligament (CAL), and compare its primary stability to the native AC joint ligamentous complex and to a modified Weaver-Dunn (WD) reconstruction. Read More

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May 2018
1 Read

Predictors of Elbow Torque Among Youth and Adolescent Baseball Pitchers.

Am J Sports Med 2018 May 1:363546518770619. Epub 2018 May 1.

Department of Orthopaedic Surgery, Henry Ford Health System, Detroit, Michigan, USA.

Background: There has been an increasing incidence of overuse elbow injuries among youth and adolescent pitchers. Pitch type has been implicated as a risk factor for excess torque at the medial elbow; however, this has not been definitively demonstrated.

Purpose: To assess predictors of torque across the medial elbow in youth and adolescent pitchers with a mobile sensor. Read More

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Effects of Allogenic Dermal Fibroblasts on Rotator Cuff Healing in a Rabbit Model of Chronic Tear.

Am J Sports Med 2018 May 1:363546518770428. Epub 2018 May 1.

Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.

Background: The failure of rotator cuffs to heal after repair is an unresolved surgical issue. There have been substantial efforts, including the use of biological supplements, to enhance tendon healing. Dermal fibroblasts are a good candidate for tendon tissue engineering because they are similar to the tenocytes used for collagen synthesis. Read More

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May 2018
5 Reads

Effects of Proud Large Osteochondral Plugs on Contact Forces and Knee Kinematics: A Robotic Study.

Am J Sports Med 2018 May 1:363546518770415. Epub 2018 May 1.

Department of Orthopaedic Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.

Background: Osteochondral allograft (OCA) transplantation is used to treat large focal femoral condylar articular cartilage defects. A proud plug could affect graft survival by altering contact forces (CFs) and knee kinematics.

Hypothesis: A proud OCA plug will significantly increase CF and significantly alter knee kinematics throughout controlled knee flexion. Read More

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Effect of Intraoperative Platelet-Rich Plasma Treatment on Postoperative Donor Site Knee Pain in Patellar Tendon Autograft Anterior Cruciate Ligament Reconstruction: A Double-Blind Randomized Controlled Trial.

Am J Sports Med 2018 May 1:363546518769295. Epub 2018 May 1.

Sports Medicine Division, Department of Orthopaedic Surgery, Lenox Hill Hospital, New York, New York, USA.

Background: Donor site morbidity in the form of anterior knee pain is a frequent complication after bone-patellar tendon-bone (BPTB) autograft anterior cruciate ligament (ACL) reconstruction. Hypothesis/Purpose: The purpose was to examine the effect of the intraoperative administration of platelet-rich plasma (PRP) on postoperative kneeling pain. It was hypothesized that PRP treatment would reduce knee pain. Read More

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How Variable Are Achilles Allografts Used for Anterior Cruciate Ligament Reconstruction? A Biomechanical Study.

Am J Sports Med 2018 May 1:363546518768780. Epub 2018 May 1.

Section of Sports Medicine, Medsport, Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, USA.

Background: Allograft tendon used in anterior cruciate ligament reconstruction (ACLR) requires sterilization before implantation. Low-dose gamma irradiation is a means of sterilization that may minimize tissue damage.

Purpose: To quantify the variability in mechanical properties between low-dose irradiated Achilles tendon allografts used for ACLR. Read More

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May 2018
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Test Performance and Test-Retest Reliability of the Vestibular/Ocular Motor Screening and King-Devick Test in Adolescent Athletes During a Competitive Sport Season.

Am J Sports Med 2018 May 1:363546518768750. Epub 2018 May 1.

Children's Health Andrews Institute for Orthopaedics and Sports Medicine, Plano, Texas, USA.

Background: The Vestibular/Ocular Motor Screening (VOMS) and King-Devick (K-D) test are tools designed to assess ocular or vestibular function after a sport-related concussion.

Purpose: To determine the test-retest reliability and rate of false-positive results of the VOMS and K-D test in a healthy athlete sample.

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

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Long-term Comparison of Semitendinosus and Gracilis Tendon Versus Patellar Tendon Autografts for Anterior Cruciate Ligament Reconstruction: A 17-Year Follow-up of a Randomized Controlled Trial.

Am J Sports Med 2018 May 1:363546518768768. Epub 2018 May 1.

Rehabilitation Center Spa Zrece, Zrece, Slovenia.

Background: Short-term and mid-term differences between hamstring and patellar tendon autografts for anterior cruciate ligament (ACL) reconstruction are well documented. Systematic reviews highlight the lack of long-term results between the two grafts.

Hypothesis: Seventeen years after ACL reconstruction, no difference will be found in functional outcome, quality of life, and graft failure between patients with patellar tendon (PT) or semitendinosus and gracilis tendon (STG) autografts; however, a significant difference will be seen in the prevalence of osteoarthritis. Read More

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Anterolateral Ligament Reconstruction Protects the Repaired Medial Meniscus: A Comparative Study of 383 Anterior Cruciate Ligament Reconstructions From the SANTI Study Group With a Minimum Follow-up of 2 Years.

Am J Sports Med 2018 May 1:363546518767659. Epub 2018 May 1.

Centre Orthopédique Santy, FIFA Medical Centre of Excellence, Groupe Ramsay-Générale de Santé, Hôpital Privé Jean Mermoz, Lyon, France.

Background: The prevalence of osteoarthritis after successful meniscal repair is significantly less than that after failed meniscal repair.

Purpose: To determine whether the addition of anterolateral ligament reconstruction (ALLR) confers a protective effect on medial meniscal repair performed at the time of anterior cruciate ligament reconstruction (ACLR).

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

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