8,652 results match your criteria American Journal of Sports Medicine[Journal]


Current Workload Recommendations in Baseball Pitchers: A Systematic Review.

Am J Sports Med 2019 Apr 23:363546519831010. Epub 2019 Apr 23.

Department of Orthopedic Surgery, University of Michigan, Ypsilanti, Michigan, USA.

Background: Several recommendations have been made regarding pitch counts and workload for baseball players of different levels, including Little League, high school, collegiate, and professional baseball. However, little consensus is found in the literature regarding the scientific basis for many of these recommendations.

Purpose: The primary purpose of this study was to summarize the evidence regarding immediate and long-term musculoskeletal responses to increasing pitching workload in baseball pitchers of all levels. Read More

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http://dx.doi.org/10.1177/0363546519831010DOI Listing

Horizontal Instability of the Acromioclavicular Joint: A Systematic Review.

Am J Sports Med 2019 Apr 23:363546519831013. Epub 2019 Apr 23.

Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana, USA.

Background: Injuries to the acromioclavicular (AC) joint are common and should be suspected in patients who have shoulder pain in the region of the acromion and clavicle. Injuries to the AC ligament can cause horizontal instability and are often neglected or underdiagnosed, which can lead to poor patient outcomes.

Purpose: To perform a systematic review of the literature on the diagnosis and treatment of horizontal instability of the AC joint. Read More

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http://dx.doi.org/10.1177/0363546519831013DOI Listing
April 2019
6 Reads

Does Arthroscopic Suture-Spanning Augmentation of Single-Row Repair Reduce the Retear Rate of Massive Rotator Cuff Tear?

Am J Sports Med 2019 Apr 18:363546519836419. Epub 2019 Apr 18.

Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan.

Background: Several surgical techniques have been proposed for massive rotator cuff tears (MRCTs), but the failure rates remain high. The suture-spanning augmentation technique of single-row (SSA-SR) repair was shown to reduce failure rates in cadaveric studies, but the outcome in vivo remains unclear.

Purpose: To determine if adding spanning sutures to SR repair during MRCT repairs can improve functional outcome and reduce failure rates. Read More

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http://dx.doi.org/10.1177/0363546519836419DOI Listing

Do Outcomes or Subsequent Injuries Differ After Ulnar Collateral Ligament Reconstruction With Palmaris Versus Hamstring Autograft?

Am J Sports Med 2019 Apr 18:363546519836086. Epub 2019 Apr 18.

Rothman Orthopaedic Institute, New York, New York, USA.

Background: Ulnar collateral ligament reconstruction (UCLR) is a successful procedure in professional baseball players. It is unclear whether graft choice affects results.

Purpose: Determine performance and rate of return to sport (RTS) in professional baseball players after UCLR and compare performance and RTS rate, as well as injury rates, between players who underwent UCLR with hamstring versus palmaris autograft. Read More

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http://dx.doi.org/10.1177/0363546519836086DOI Listing
April 2019
2 Reads

Radiographic Prevalence of Symphysis Pubis Abnormalities and Clinical Outcomes in Patients With Femoroacetabular Impingement Syndrome.

Am J Sports Med 2019 Apr 17:363546519837203. Epub 2019 Apr 17.

Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopaedic Surgery, Rush Medical College of Rush University, Rush University Medical Center, Chicago, Illinois, USA.

Background: The decreased hip range of motion seen in femoroacetabular impingement syndrome (FAIS) may lead to compensatory increased motion at the symphysis pubis (SP) with resultant increased stress on the joint, which can subsequently lead to osteitis pubis.

Purpose: To quantify the prevalence of SP abnormalities in patients with FAIS through the use of imaging modalities and to compare outcomes based on the presence of SP abnormalities.

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

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http://dx.doi.org/10.1177/0363546519837203DOI Listing
April 2019
1 Read

Outcomes of Revision Anterior Cruciate Ligament Surgery in Adolescents.

Am J Sports Med 2019 Apr 17:363546519837173. Epub 2019 Apr 17.

Department of Orthopedic Surgery, University of California, San Diego, California, USA.

Background: Although primary anterior cruciate ligament (ACL) reconstructions have been well studied in children and adolescents, the literature lacks information about revision ACL reconstructions in this population.

Purpose: This study aims to analyze the outcomes of revision ACL surgeries in the pediatric population.

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

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http://dx.doi.org/10.1177/0363546519837173DOI Listing
April 2019
3 Reads

Partial Transphyseal Anterior Cruciate Ligament Reconstruction: Clinical, Functional, and Radiographic Outcomes.

Am J Sports Med 2019 Apr 17:363546519836423. Epub 2019 Apr 17.

Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA.

Background: With a steadily increasing rate of anterior cruciate ligament (ACL) injury and reconstruction in the pediatric population, disagreement remains regarding the optimal reconstruction technique for patients with ACL injury and ≥2 years of growth remaining.

Purpose: This study aims to quantify the incidence of linear and angular growth disturbance of adolescents undergoing partial transphyseal ACL reconstruction (ACLR) while assessing graft failure rates, reoperation rates, and functional outcomes in the population.

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

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http://dx.doi.org/10.1177/0363546519836423DOI Listing
April 2019
3 Reads

Incidence of Knee Injuries on Artificial Turf Versus Natural Grass in National Collegiate Athletic Association American Football: 2004-2005 Through 2013-2014 Seasons.

Am J Sports Med 2019 Apr 17:363546519833925. Epub 2019 Apr 17.

School of Medicine, Georgetown University, Washington, DC, USA.

Background: The use of artificial turf in American football continues to grow in popularity, and the effect of these playing surfaces on athletic injuries remains controversial. Knee injuries account for a significant portion of injuries in the National Collegiate Athletic Association (NCAA) football league; however, the effect of artificial surfaces on knee injuries remains ill-defined.

Hypothesis: There is no difference in the rate or mechanism of knee ligament and meniscal injuries during NCAA football events on natural grass and artificial turf playing surfaces. Read More

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http://dx.doi.org/10.1177/0363546519833925DOI Listing
April 2019
3 Reads

Anterior Cruciate Ligament Tear Promotes Skeletal Muscle Myostatin Expression, Fibrogenic Cell Expansion, and a Decline in Muscle Quality.

Am J Sports Med 2019 Apr 17:363546519832864. Epub 2019 Apr 17.

Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas, USA.

Background: Anterior cruciate ligament (ACL) tears result in significant quadriceps muscle atrophy that is resistant to recovery despite extensive rehabilitation. Recent work suggests an elevated fibrotic burden in the quadriceps muscle after the injury, which may limit recovery. Elucidating the mechanisms and cell types involved in the progression of fibrosis is critical for developing new treatment strategies. Read More

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http://dx.doi.org/10.1177/0363546519832864DOI Listing
April 2019
1 Read

Five-Year Outcomes and Return to Sport of Runners Undergoing Hip Arthroscopy for Labral Tears With or Without Femoroacetabular Impingement.

Am J Sports Med 2019 Apr 16:363546519836429. Epub 2019 Apr 16.

American Hip Institute, Des Plaines, Illinois, USA.

Background: Recent evidence has demonstrated a high rate of return to running after hip arthroscopy for femoroacetabular impingement at short-term follow-up. The midterm outcomes and rates of continued running of these patients are unknown.

Purpose: To evaluate midterm rates of return to running and outcomes after hip arthroscopy. Read More

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http://dx.doi.org/10.1177/0363546519836429DOI Listing
April 2019
1 Read

Predictors of Healing Ligament Size and Magnetic Resonance Signal Intensity at 6 Months After Bridge-Enhanced Anterior Cruciate Ligament Repair.

Am J Sports Med 2019 Apr 15:363546519836087. Epub 2019 Apr 15.

Investigation performed at Boston Children's Hospital, Boston, Massachusetts, USA.

Background: Primary repair of the anterior cruciate ligament (ACL) augmented with a tissue engineered scaffold to facilitate ligament healing is a technique under development for patients with ACL injuries. The size (the amount of tissue) and signal intensity (the quality of tissue) of the healing ligament as visualized on magnetic resonance imaging (MRI) have been shown to be related to its strength in large animal models.

Hypothesis: Both modifiable and nonmodifiable risk factors could influence the size and signal intensity of the repaired ligament in patients at 6 months after surgery. Read More

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http://dx.doi.org/10.1177/0363546519836087DOI Listing
April 2019
2 Reads

Visual-Spatial Memory Deficits Are Related to Increased Knee Valgus Angle During a Sport-Specific Sidestep Cut.

Am J Sports Med 2019 Apr 15:363546519834544. Epub 2019 Apr 15.

School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, Ohio, USA.

Background: Identifying athletes at an increased risk of injury is a promising approach to improve the effect of injury prevention interventions; however, it requires first identifying the potential athlete-specific risk factors. Cognitive ability was recently shown to correlate with noncontact anterior cruciate ligament injury rates and lower extremity mechanics, marking an underexplored area. A better understanding of how individuals' cognitive ability is associated with neuromuscular control during sport-specific tasks may improve injury prevention. Read More

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http://dx.doi.org/10.1177/0363546519834544DOI Listing
April 2019
1 Read

Hinge Fractures Are Underestimated on Plain Radiographs After Open Wedge Proximal Tibial Osteotomy: Evaluation by Computed Tomography.

Am J Sports Med 2019 Apr 15:363546519836949. Epub 2019 Apr 15.

Department of Nursing, Asan Medical Center, Seoul, Republic of Korea.

Background: Lateral hinge fracture (LHF) after medial open wedge high tibial osteotomy (MOWHTO) may not be recognized on perioperative plain radiographs. Such cases may be identified at follow-up and misdiagnosed as delayed LHF.

Purpose: This study aimed to investigate the extent of LHF misdiagnosis and to determine whether patients with LHFs have inferior clinical outcomes after MOWHTO. Read More

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http://dx.doi.org/10.1177/0363546519836949DOI Listing
April 2019
2 Reads

Anterior Cruciate Ligament Graft Conditioning Required to Prevent an Abnormal Lachman and Pivot Shift After ACL Reconstruction: A Robotic Study of 3 ACL Graft Constructs.

Am J Sports Med 2019 Apr 15:363546519835796. Epub 2019 Apr 15.

The Jewish Hospital-Mercy Health and The Noyes Knee Institute, Cincinnati, Ohio, USA.

Background: Anterior cruciate ligament (ACL) graft conditioning protocols to decrease postoperative increases in anterior tibial translation and pivot-shift instability have not been established.

Purpose: To determine what ACL graft conditioning protocols should be performed at surgery to decrease postoperative graft elongation after ACL reconstruction.

Study Design: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546519835796DOI Listing

Isolated Medial Patellofemoral Ligament Reconstruction for Patellar Instability Regardless of Tibial Tubercle-Trochlear Groove Distance and Patellar Height: Outcomes at 1 and 2 Years.

Am J Sports Med 2019 Apr 15:363546519835800. Epub 2019 Apr 15.

Division of Sports and Shoulder, Hospital for Special Surgery, New York, New York, USA.

Background: It is unclear which patients with recurrent patellar instability require a bony procedure in addition to medial patellofemoral ligament (MPFL) reconstruction.

Purpose: To report 1- and 2-year outcomes of patients after isolated MPFL reconstruction performed for patellar instability regardless of patellar height, tibial tubercle-trochlear groove (TT-TG) distance, or trochlear dysplasia.

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

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http://dx.doi.org/10.1177/0363546519835800DOI Listing

Do Patient Reported Outcome Measurement Information System (PROMIS) Scales Demonstrate Responsiveness as Well as Disease-Specific Scales in Patients Undergoing Knee Arthroscopy?

Am J Sports Med 2019 Apr 10:363546519832546. Epub 2019 Apr 10.

Department of Orthopaedics and Rehabilitation, University of Rochester, Rochester, New York, USA.

Background: The Patient Reported Outcomes Information System (PROMIS) is an efficient metric able to detect changes in global health.

Purpose: To assess the responsiveness, convergent validity, and clinically important difference (CID) of PROMIS compared with disease-specific scales after knee arthroscopy.

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

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http://dx.doi.org/10.1177/0363546519832546DOI Listing
April 2019
1 Read

Dynamic Anterior Shoulder Stabilization With the Long Head of the Biceps Tendon: A Biomechanical Study.

Am J Sports Med 2019 Apr 9:363546519833990. Epub 2019 Apr 9.

Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, USA.

Background: The concept of dynamic anterior shoulder stabilization (DAS) combines a Bankart repair with the additional sling effect of the long head of the biceps (LHB) tendon to treat anterior glenohumeral instability. This surgical technique was created to close the gap between the indications for isolated Bankart repair and those requiring bone transfer techniques.

Purpose: To biomechanically investigate the stabilizing effects of the DAS technique in comparison with the standard Bankart repair in different defect models. Read More

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http://dx.doi.org/10.1177/0363546519833990DOI Listing
April 2019
2 Reads

Effectiveness of Isolated Hip Exercise, Knee Exercise, or Free Physical Activity for Patellofemoral Pain: A Randomized Controlled Trial.

Am J Sports Med 2019 Apr 8:363546519830644. Epub 2019 Apr 8.

Department of Orthopedic Surgery, Sørlandet Hospital Kristiansand, Kristiansand, Norway.

Background: Exercise for patellofemoral pain (PFP) is traditionally knee focused, targeting quadriceps muscles. In recent years, hip-focused exercise has gained popularity. Patient education is likely an important factor but is underresearched. Read More

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http://journals.sagepub.com/doi/10.1177/0363546519830644
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http://dx.doi.org/10.1177/0363546519830644DOI Listing
April 2019
6 Reads

Complete Capsular Repair Restores Native Kinematics After Interportal and T-Capsulotomy.

Am J Sports Med 2019 Apr 4:363546519832868. Epub 2019 Apr 4.

Fowler Kennedy Sports Medicine Clinic, Department of Surgery, Western University, London, Ontario, Canada.

Background:: Although the use of hip arthroscopy continues to increase, capsular management remains a controversial topic.

Purpose:: To investigate the biomechanical effect of capsulotomy and capsular repair techniques on hip joint kinematics in varying combinations of sagittal and coronal joint positions.

Study Design:: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546519832868DOI Listing

Clinical and Radiological Predictors of Functional Outcome After Isolated Medial Patellofemoral Ligament Reconstruction at Midterm Follow-up.

Am J Sports Med 2019 Apr 3:363546519831294. Epub 2019 Apr 3.

Department of Orthopaedic Surgery, University Hospital of Saint Étienne, Saint Étienne, France.

Background:: Isolated medial patellofemoral ligament reconstruction (iMPFLR) is increasingly used for the surgical treatment of recurrent patellofemoral instability.

Purpose:: The purpose of this study was to identify the clinical and radiological predictors that can significantly influence the functional outcomes after an iMPFLR.

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

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http://dx.doi.org/10.1177/0363546519831294DOI Listing
April 2019
3 Reads

Society News and Announcements.

Authors:

Am J Sports Med 2019 Apr;47(5):1270-1271

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http://dx.doi.org/10.1177/0363546519841026DOI Listing

Corrigendum.

Authors:

Am J Sports Med 2019 Apr;47(5):NP38

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http://dx.doi.org/10.1177/0363546519841401DOI Listing

The Effect of Tendon Delamination on Rotator Cuff Healing.

Am J Sports Med 2019 Apr;47(5):1074-1081

IULS-Hôpital Pasteur 2, Nice, France.

Background:: While patient age, tear size, and muscle fatty infiltration are factors known to affect the rate of tendon healing after rotator cuff repair, the effect of tendon delamination is less known.

Purpose:: To assess the effect of tendon delamination on rotator cuff healing after arthroscopic single-row (SR) repair.

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

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http://dx.doi.org/10.1177/0363546519835491DOI Listing

Influence of Acetabular Labral Tear Length on Outcomes After Hip Arthroscopy for Femoroacetabular Impingement Syndrome With Capsular Plication.

Am J Sports Med 2019 Apr;47(5):1145-1150

Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.

Background:: The literature on the effects of labral tear on patient-reported outcomes, midterm pain, and overall patient satisfaction is limited.

Purpose:: To determine the effect of labral tear length on postoperative outcomes after hip arthroscopy for femoroacetabular impingement syndrome (FAIS).

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

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http://dx.doi.org/10.1177/0363546519831291DOI Listing
April 2019
1 Read

Ulnar Collateral Ligament Repair With Collagen-Dipped FiberTape Augmentation in Overhead-Throwing Athletes.

Am J Sports Med 2019 Apr;47(5):1096-1102

American Sports Medicine Institute, Birmingham, Alabama, USA.

Background:: There has been a renewed interest in ulnar collateral ligament (UCL) repair in overhead athletes because of a greater understanding of UCL injuries, an improvement in fixation technology, and the extensive rehabilitation time to return to play.

Purpose/hypothesis:: To evaluate the clinical outcomes of a novel technique of UCL repair with internal brace augmentation in overhead throwers.

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

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http://dx.doi.org/10.1177/0363546519833684DOI Listing
April 2019
12 Reads

Prospective Evaluation of Glenoid Bone Loss After First-time and Recurrent Anterior Glenohumeral Instability Events.

Am J Sports Med 2019 Apr;47(5):1082-1089

Uniformed Services University of Health Sciences, Bethesda, Maryland, USA.

Background:: Determining the amount of glenoid bone loss in patients after anterior glenohumeral instability events is critical to guiding appropriate treatment. One of the challenges in treating the shoulder instability of young athletes is the absence of clear data showing the effect of each event.

Purpose:: To prospectively determine the amount of bone loss associated with a single instability event in the setting of first-time and recurrent instability. Read More

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http://dx.doi.org/10.1177/0363546519831286DOI Listing
April 2019
2 Reads

Correlation Between Magnetic Resonance Imaging and Surgical Exploration of the Anterolateral Structures of the Acute Anterior Cruciate Ligament-Injured Knee.

Am J Sports Med 2019 Apr;47(5):1186-1193

Orthopaedic Unit and Kirk Kilgour Sports Injury Centre, S. Andrea Hospital, University of Rome Sapienza, Rome, Italy.

Background:: Combined anterior cruciate ligament (ACL) and anterolateral ligament (ALL) reconstruction is associated with improved clinical outcomes as compared with isolated intra-articular reconstruction, but the indications are not precisely defined. It may be the case that patients with proven anterolateral injury on preoperative imaging are most likely to benefit, but the accuracy of magnetic resonance imaging (MRI) is not known.

Purpose/hypothesis:: To evaluate the correlation between MRI and surgical exploration in acute ACL-injured knees. Read More

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http://dx.doi.org/10.1177/0363546519831686DOI Listing
April 2019
1 Read
4.362 Impact Factor

Back to Normal Symmetry? Biomechanical Variables Remain More Asymmetrical Than Normal During Jump and Change-of-Direction Testing 9 Months After Anterior Cruciate Ligament Reconstruction.

Am J Sports Med 2019 Apr;47(5):1175-1185

Department of Life Sciences, Roehampton University, London, UK.

Background:: After anterior cruciate ligament reconstruction (ACLR), athletes have demonstrated performance asymmetries as compared with healthy cohorts, but little research has investigated if biomechanical asymmetries are also different during jump and change-of-direction (CoD) tasks between groups.

Purpose:: To identify if differences in magnitude of asymmetry of biomechanical and performance variables exist between these groups.

Study Design:: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546519830656DOI Listing
April 2019
1 Read

The Ivy League-Big Ten Epidemiology of Concussion Study: A Report on Methods and First Findings.

Am J Sports Med 2019 Apr;47(5):1236-1247

Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Background:: Little is known about the nature of concussion injury among university student-athletes, including concussion incidence and rates across sports, the mechanisms of injury, the type of activity during competition or practice, and the time to return to academics, return to sport, and symptom resolution.

Purpose:: To describe methods of the Ivy League-Big Ten Epidemiology of Concussion Study and first epidemiologic findings.

Study Design:: Descriptive epidemiology study. Read More

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http://dx.doi.org/10.1177/0363546519830100DOI Listing
April 2019
1 Read

Elective Shoulder Surgery in the Opioid Naïve: Rates of and Risk Factors for Long-term Postoperative Opioid Use.

Am J Sports Med 2019 Apr;47(5):1051-1056

Rothman Orthopaedic Institute, New York, New York, USA.

Background:: Little is known regarding the rates and risk factors for long-term postoperative opioid use among opioid-naïve patients undergoing elective shoulder surgery.

Purpose:: To identify (1) the proportion of opioid-naïve patients undergoing elective shoulder surgery, (2) the rates of postoperative opioid use among these patients, and (3) the risk factors associated with long-term postoperative opioid use.

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

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http://dx.doi.org/10.1177/0363546519837516DOI Listing
April 2019
2 Reads

Influence of Cigarette Smoking at the Time of Surgery on Postoperative Outcomes in Patients With Femoroacetabular Impingement: A Matched-Pair Cohort Analysis.

Am J Sports Med 2019 Apr;47(5):1138-1144

Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.

Background:: There is literature on the association between smoking in patients undergoing orthopaedic procedures and poor short-term outcomes. However, there are few data on smoking as an independent predictor of midterm outcomes in patients undergoing hip arthroscopic surgery for femoroacetabular impingement (FAI).

Purpose:: To evaluate 2-year postoperative outcomes in patients undergoing hip arthroscopic surgery for FAI in current smokers compared with an age- and body mass index (BMI)-matched group with no smoking history. Read More

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http://dx.doi.org/10.1177/0363546519832545DOI Listing
April 2019
4 Reads

Opioid Epidemic.

Authors:
Bruce Reider

Am J Sports Med 2019 Apr;47(5):1039-1042

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http://dx.doi.org/10.1177/0363546519836727DOI Listing

Performance and Return to Sport After Latissimus Dorsi and Teres Major Tears Among Professional Baseball Pitchers.

Am J Sports Med 2019 Apr 21;47(5):1090-1095. Epub 2019 Mar 21.

Department of Orthopaedic Surgery, Rothman Orthopaedic Institute, New York, New York, USA.

Background:: Latissimus dorsi and teres major (LD/TM) tears are becoming an increasingly common cause of injury and disability among professional baseball pitchers.

Purpose/hypothesis:: To determine performance and return to sport (RTS) among professional baseball pitchers after LD/TM tears treated operatively and nonoperatively and to compare the RTS rate and performance between pitchers who sustained an LD/TM tear and matched controls. The authors hypothesized a high RTS rate among professional baseball pitchers after LD/TM tears, with no significant difference in RTS rate or performance between cases and controls for operative and nonoperative treatment-specifically, in the primary performance outcome variables of WHIP ([walks + hits] / innings pitched), fielding independent pitching, and wins above replacement. Read More

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http://dx.doi.org/10.1177/0363546519829086DOI Listing
April 2019
2 Reads

Side of Hamstring Harvest Does Not Affect Performance, Return-to-Sport Rate, or Future Hamstring Injuries After Ulnar Collateral Ligament Reconstruction Among Professional Baseball Pitchers.

Am J Sports Med 2019 Apr 21;47(5):1111-1116. Epub 2019 Mar 21.

Rothman Orthopaedic Institute, New York, New York, USA.

Background:: Ulnar collateral ligament reconstruction (UCLR) is a successful procedure among professional baseball pitchers. It is unclear if hamstring tendon harvest side for UCLR affects the outcome or alters the risk for subsequent hamstring injury.

Hypothesis:: Players with prior UCLR with ipsilateral (drive leg) hamstring autograft will have the same return-to-sport (RTS) rate and performance upon RTS but a higher number of subsequent lower extremity injuries than those with contralateral (landing leg) hamstring autograft. Read More

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http://dx.doi.org/10.1177/0363546519829473DOI Listing
April 2019
4 Reads

Biomechanical Comparison of Vertical Mattress and Cross-stitch Suture Techniques and Single- and Double-Row Configurations for the Treatment of Bucket-Handle Medial Meniscal Tears.

Am J Sports Med 2019 Apr 21;47(5):1194-1202. Epub 2019 Mar 21.

The Steadman Clinic, Vail, Colorado, USA.

Background:: Given the variety of suturing techniques for bucket-handle meniscal repair, it is important to assess which suturing technique best restores native biomechanics.

Purpose/hypothesis:: To biomechanically compare vertical mattress and cross-stitch suture techniques, in single- and double-row configurations, in their ability to restore native knee kinematics in a bucket-handle medial meniscal tear model. The hypothesis was that there would be no difference between the vertical mattress and cross-stitch double-row suture techniques but that the double-row technique would provide significantly improved biomechanical parameters versus the single-row technique. Read More

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http://dx.doi.org/10.1177/0363546519830402DOI Listing
April 2019
1 Read

Tibial Slope and Its Effect on Graft Force in Posterior Cruciate Ligament Reconstructions.

Am J Sports Med 2019 Apr 21;47(5):1168-1174. Epub 2019 Mar 21.

The Steadman Clinic, Vail, Colorado, USA.

Background:: A flattened posterior tibial slope may cause excessive unwanted stress on the posterior cruciate ligament (PCL) reconstruction graft and place patients at risk for PCL reconstruction graft failure. To date, there is a paucity of biomechanical studies evaluating the effect of posterior tibial slope on the loading properties of single-bundle (SB) and double-bundle (DB) PCL grafts.

Purpose/hypothesis:: The purpose of this study was to quantify the effect of sagittal plane tibial slope on PCL reconstruction graft force at varying slopes and knee flexion angles for SB and DB PCL reconstructions. Read More

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http://dx.doi.org/10.1177/0363546519827958DOI Listing

Comparison of Standard and Right/Left International Knee Documentation Committee Subjective Knee Form Scores.

Am J Sports Med 2019 Apr 21;47(5):1203-1208. Epub 2019 Mar 21.

Cleveland Clinic Sports Health Center, Garfield Heights, Ohio, USA.

Background:: The International Knee Documentation Committee Subjective Knee Form (IKDC-SKF) is a validated patient-reported outcome used in clinical research. No studies exist directly comparing the standard unilateral adult version (IKDC-SKF) with the bilateral adult version (R/L IKDC-SKF).

Hypotheses:: The first hypothesis is that no clinically relevant difference would be observed between standard IKDC-SKF scores and involved R/L scores. Read More

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http://journals.sagepub.com/doi/10.1177/0363546519829770
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http://dx.doi.org/10.1177/0363546519829770DOI Listing
April 2019
6 Reads

Comparison of Outcomes Based on Graft Type and Tunnel Configuration for Primary Ulnar Collateral Ligament Reconstruction in Professional Baseball Pitchers.

Am J Sports Med 2019 Apr 21;47(5):1103-1110. Epub 2019 Mar 21.

Division of Sports Medicine, Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.

Background:: Professional baseball pitchers are at high risk for tears of the ulnar collateral ligament (UCL) of the elbow, often requiring surgical reconstruction. Despite acceptable published return-to-play outcomes, multiple techniques and graft types have been described.

Purpose:: This study compares UCL reconstruction (UCLR) outcomes based on tunnel configuration and graft type. Read More

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http://dx.doi.org/10.1177/0363546519831705DOI Listing

Variations in Blood Supply From Proximal to Distal in the Ulnar Collateral Ligament of the Elbow: A Qualitative Descriptive Cadaveric Study.

Am J Sports Med 2019 Apr 21;47(5):1117-1123. Epub 2019 Mar 21.

The Steadman Clinic, Vail, Colorado, USA.

Background:: The vascular supply of the ulnar collateral ligament (UCL) is unknown. Previous studies reported varying success in return-to-play rates after nonoperative management of partial UCL tears and suggested a varying healing capacity as possibly related to the location of the UCL injury.

Purpose:: To analyze the macroscopic vascular anatomy of the UCL of the elbow. Read More

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http://dx.doi.org/10.1177/0363546519831693DOI Listing
April 2019
6 Reads

Effects of Aspirin on Growth Factor Release From Freshly Isolated Leukocyte-Rich Platelet-Rich Plasma in Healthy Men: A Prospective Fixed-Sequence Controlled Laboratory Study.

Am J Sports Med 2019 Apr 19;47(5):1223-1229. Epub 2019 Mar 19.

Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.

Background:: The benefits of platelet-rich plasma (PRP) are believed to be in part dependent on growth factor release after platelet activation. Platelet activation is complex and involves multiple mechanisms. One important mechanism is driven by cyclooxygenase 1 (COX-1)-mediated conversion of arachidonic acid (AA) to precursor prostaglandins that then mediate proinflammatory responses that trigger growth factor release. Read More

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http://dx.doi.org/10.1177/0363546519827294DOI Listing

Epidemiology of Shoulder Surgery Among Professional Baseball Players.

Am J Sports Med 2019 Apr 18;47(5):1068-1073. Epub 2019 Mar 18.

Rothman Institute, New York, New York, USA.

Background:: Injuries remain a significant problem for professional baseball players. There is little information regarding the incidence and outcomes of shoulder surgical procedures among these athletes.

Purpose/hypothesis:: To report the incidence, pathology, procedure type, demographics, and return-to-sport (RTS) rate of shoulder surgery among Major League Baseball (MLB) players. Read More

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http://dx.doi.org/10.1177/0363546519832525DOI Listing
April 2019
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Prospective Evaluation of the Patient Acceptable Symptom State to Identify Clinically Successful Anterior Cruciate Ligament Reconstruction.

Am J Sports Med 2019 Apr 18;47(5):1159-1167. Epub 2019 Mar 18.

Cleveland Clinic Orthopaedics Sports Health, Cleveland, Ohio, USA.

Background:: The length of most patient-reported outcome measures creates significant response burden, which hampers follow-up rates. The Patient Acceptable Symptom State (PASS) is a single-item, patient-reported outcome measure that asks patients to consider all aspects of life to determine whether the state of their joint is satisfactory; this measure may be viable for tracking outcomes on a large scale.

Hypothesis:: The PASS question would identify clinically successful anterior cruciate ligament reconstruction (ACLR) at 1-year follow-up with high sensitivity and moderate specificity. Read More

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http://dx.doi.org/10.1177/0363546519831008DOI Listing
April 2019
1 Read

Performance and Return to Sport After Ulnar Nerve Decompression/Transposition Among Professional Baseball Players.

Am J Sports Med 2019 Apr 18;47(5):1124-1129. Epub 2019 Mar 18.

Rothman Orthopaedic Institute, Department of Orthopaedic Surgery, New York, New York, USA.

Background:: Isolated ulnar nerve decompression/transposition is an uncommon surgical procedure among professional baseball players.

Purpose/hypothesis:: To determine performance and rate of return to sport (RTS) among professional baseball players after isolated ulnar nerve decompression/transposition, including those who required decompression/transposition after ulnar collateral ligament reconstruction (UCLR), and to compare outcomes between cases and matched controls. The authors hypothesized a high rate of RTS among professional baseball players undergoing isolated ulnar nerve decompression/transposition with no difference in RTS rate or performance between cases and controls as related to earned run average, WHIP ([walks + hits]/innings pitched), wins above replacement, and on base + slugging percentage. Read More

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http://dx.doi.org/10.1177/0363546519829159DOI Listing
April 2019
2 Reads

Long-term, Prospective, Multicenter Study of Isolated Bankart Repair for a Patient Selection Method Based on the Instability Severity Index Score.

Am J Sports Med 2019 Apr 18;47(5):1057-1061. Epub 2019 Mar 18.

Groupe Ramsay Generale de Santé, Clinique Maussins Nollet, Paris, France.

Background:: An isolated arthroscopic Bankart repair carries a high mid- and long-term risk of recurring instability. Preoperative patient selection based on the Instability Severity Index Score should improve outcomes.

Purpose:: To report the overall long-term recurrence rate for isolated Bankart repair, investigate the predictive factors for recurrence, analyze time to recurrence, and determine a quantitative cutoff point for recurrence in terms of Instability Severity Index Score. Read More

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http://dx.doi.org/10.1177/0363546519833920DOI Listing
April 2019
4 Reads

A 6-Week Transition to Maximal Running Shoes Does Not Change Running Biomechanics.

Am J Sports Med 2019 Mar;47(4):968-973

Program in Kinesiology, Oregon State University-Cascades, Bend, Oregon, USA.

Background:: A recent study suggested that maximal running shoes may increase the impact force and loading rate of the vertical ground-reaction force during running. It is currently unknown whether runners will adapt to decrease the impact force and loading rate over time.

Purpose:: To compare the vertical ground-reaction force and ankle kinematics between maximal and traditional shoes before and after a 6-week acclimation period to the maximal shoe. Read More

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http://dx.doi.org/10.1177/0363546519826086DOI Listing
March 2019
6 Reads