8,550 results match your criteria American Journal of Sports Medicine[Journal]


Long-term Outcomes of Meniscal Allograft Transplantation With and Without Extrusion: Mean 12.3-Year Follow-up Study.

Am J Sports Med 2019 Feb 14:363546518825251. Epub 2019 Feb 14.

Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Republic of Korea.

Background:: Meniscal allograft transplantation (MAT) is a widely performed surgical technique used to reconstruct meniscal deficiencies after meniscectomy. However, the long-term effects of extrusion on clinical and radiologic outcomes are unclear.

Hypothesis:: In long-term follow-up, extrusion after MAT would show poorer outcomes than nonextrusion and would lead to faster progression of arthritic changes. Read More

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http://dx.doi.org/10.1177/0363546518825251DOI Listing
February 2019

Application of a Purified Protein From Natural Latex and the Influence of Suture Type on Achilles Tendon Repair in Rats.

Am J Sports Med 2019 Feb 13:363546518822836. Epub 2019 Feb 13.

Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.

Background:: The prolonged tendon-healing process, the high costs associated with treatment, the increase in the number of injuries over the past decades, and the lack of consensus on the optimal treatment of tendon injuries are a global problem. Restoring the normal tendon anatomy and decreasing the healing time are key factors for treatment advancement.

Hypothesis:: Application of a purified protein from natural latex (PPNL) accelerates the healing process, increasing collagen synthesis and decreasing metalloproteinases. Read More

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http://dx.doi.org/10.1177/0363546518822836DOI Listing
February 2019

Autologous Chondrocyte Implantation for Bipolar Chondral Lesions in the Patellofemoral Compartment: Clinical Outcomes at a Mean 9 Years' Follow-up.

Am J Sports Med 2019 Feb 13:363546518824600. Epub 2019 Feb 13.

Cartilage Repair Center, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Background:: Treating bipolar chondral lesions in the patellofemoral (PF) compartment is a challenging problem. There are few reports available on the treatment of bipolar chondral lesions in the PF compartment.

Purpose:: To evaluate the clinical outcomes and graft survivorship after autologous chondrocyte implantation (ACI) for the treatment of bipolar chondral lesions in the PF compartment. Read More

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http://dx.doi.org/10.1177/0363546518824600DOI Listing
February 2019

The Timing of Corticosteroid Injections After Arthroscopic Shoulder Procedures Affects Postoperative Infection Risk.

Am J Sports Med 2019 Feb 13:363546518825348. Epub 2019 Feb 13.

Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, USA.

Background:: Corticosteroid injections are sometimes used in the postoperative period after shoulder arthroscopy; however, a well-defined safety profile has not been established.

Purpose:: To examine the association between the timing of postoperative corticosteroid injections and rates of infection after shoulder arthroscopy.

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

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http://dx.doi.org/10.1177/0363546518825348DOI Listing
February 2019

Psychological Readiness to Return to Sport Is Associated With Second Anterior Cruciate Ligament Injuries.

Am J Sports Med 2019 Feb 12:363546518825258. Epub 2019 Feb 12.

School of Allied Health, La Trobe University, Melbourne, Australia.

Background:: Psychological responses after anterior cruciate ligament (ACL) injury and ACL reconstruction (ACLR) have been identified as predictors of return to sport but have not been investigated in relation to further injury.

Purpose/hypothesis:: To determine whether psychological readiness to return to sport is associated with second ACL injury. It was hypothesized a priori that at both preoperative and 12-month postoperative time points, patients who sustained a second ACL injury would have lower psychological readiness than patients who did not have a second injury. Read More

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http://dx.doi.org/10.1177/0363546518825258DOI Listing
February 2019
1 Read

Relationship Between PROMIS Computer Adaptive Tests and Legacy Hip Measures Among Patients Presenting to a Tertiary Care Hip Preservation Center.

Am J Sports Med 2019 Feb 12:363546518825252. Epub 2019 Feb 12.

Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA.

Background:: Legacy hip outcome measures may be burdensome to patients and sometimes yield floor or ceiling effects. Patient-Reported Outcomes Measurement Information System (PROMIS) computer adaptive tests (CATs) allow for low-burden data capture and limited ceiling and floor effects.

Purpose/hypothesis:: The purpose of this study was to determine whether the PROMIS CAT domains demonstrate correlation against commonly used legacy patient-reported outcome measures in a population of patients presenting to a tertiary care hip preservation center. Read More

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http://dx.doi.org/10.1177/0363546518825252DOI Listing
February 2019

Minimum 10-Year Results of Single- Versus Double-Bundle Posterior Cruciate Ligament Reconstruction: Clinical, Radiologic, and Survivorship Outcomes.

Am J Sports Med 2019 Feb 12:363546518825257. Epub 2019 Feb 12.

Department of Orthopaedic Surgery, Kyung Hee University Hospital, Seoul, Republic of Korea.

Background:: Biomechanical studies have shown that double-bundle (DB) posterior cruciate ligament reconstruction (PCLR) is better than single-bundle (SB) PCLR in restoring normal biomechanical function and stability. However, most clinical studies report no differences between the technical methods, and there is yet no long-term clinical comparative study.

Hypothesis:: DB PCLR would show superior results and survivorship outcomes to those of SB PCLR in long-term follow-up. Read More

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http://dx.doi.org/10.1177/0363546518825257DOI Listing
February 2019
4.362 Impact Factor

Prevalence of Generalized Ligamentous Laxity in Patients Undergoing Hip Arthroscopy: A Prospective Study of Patients' Clinical Presentation, Physical Examination, Intraoperative Findings, and Surgical Procedures.

Am J Sports Med 2019 Feb 12:363546518825246. Epub 2019 Feb 12.

American Hip Institute, Westmont, Illinois, USA.

Background:: Recent studies identified microinstability in the hip as a pathoetiology of painful hip conditions, and it was proposed that generalized ligamentous laxity conditions may predispose patients to such microinstability.

Purpose:: To study the relationship of generalized ligamentous laxity with patient characteristics, clinical presentation, intraoperative findings, and surgical treatments in a cohort of patients undergoing hip arthroscopy.

Study Design:: Cross-sectional study; Level of evidence, 3. Read More

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http://dx.doi.org/10.1177/0363546518825246DOI Listing
February 2019

High Plantar Force Loading After Achilles Tendon Rupture Repair With Early Functional Mobilization.

Am J Sports Med 2019 Feb 11:363546518824326. Epub 2019 Feb 11.

Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.

Background:: Mechanical loading is essential for tendon healing and may explain variability in patient outcomes after Achilles tendon rupture (ATR) repair. However, there is no consensus regarding the optimal postoperative regimen, and the actual amount of loading during orthosis immobilization is unknown.

Purpose:: The primary aim of this study was to assess the number of steps and the amount of loading in a weightbearing orthosis during the first 6 weeks after surgical ATR repair. Read More

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http://dx.doi.org/10.1177/0363546518824326DOI Listing
February 2019
1 Read

Risk of Prolonged Opioid Use Among Opioid-Naïve Patients After Common Shoulder Arthroscopy Procedures.

Am J Sports Med 2019 Feb 8:363546518819780. Epub 2019 Feb 8.

Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA.

Background:: Opioid-related morbidity and mortality are major public health concerns, and the risk of long-term opioid use after shoulder arthroscopy is not well defined.

Hypothesis:: Substance abuse disorders, pain disorders, and psychiatric conditions increase the risk for prolonged opioid use.

Study Design:: Case-control study, Level of evidence, 3. Read More

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http://dx.doi.org/10.1177/0363546518819780DOI Listing
February 2019
1 Read

Efficacy of Pharmacological Therapies for Adhesive Capsulitis of the Shoulder: A Systematic Review and Network Meta-analysis.

Am J Sports Med 2019 Feb 8:363546518823337. Epub 2019 Feb 8.

1st Orthopaedic Department, Aristotle University of Thessaloniki, George Papanikolaou Hospital, Thessaloniki, Greece.

Background:: Several pharmacological interventions are used for the management of adhesive capsulitis of the shoulder, although the optimal treatment has yet to be defined.

Purpose:: To conduct a network meta-analysis to compare the effects of different pharmacological interventions for adhesive capsulitis, administered either alone or after distension of the shoulder capsule.

Study Design:: Network meta-analysis. Read More

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http://dx.doi.org/10.1177/0363546518823337DOI Listing
February 2019
1 Read

The Addition of Hip Arthroscopy to Periacetabular Osteotomy Does Not Increase Complication Rates: A Prospective Case Series.

Am J Sports Med 2019 Feb 7:363546518820528. Epub 2019 Feb 7.

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

Background:: Previous studies on periacetabular osteotomy (PAO) reported complication and reoperation rates of 5.9% and 10%, respectively. Hip arthroscopy is increasingly utilized as an adjunct procedure to PAO to precisely treat associated intra-articular pathology. Read More

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http://dx.doi.org/10.1177/0363546518820528DOI Listing
February 2019
2 Reads

ACL Repair With Suture Ligament Augmentation Is Associated With a High Failure Rate Among Adolescent Patients.

Am J Sports Med 2019 Feb 7:363546518825255. Epub 2019 Feb 7.

Children's Hospital Colorado, Aurora, Colorado, USA.

Background:: The anterior cruciate ligament (ACL) repair technique avoids graft harvest and therefore the risk of donor site morbidity. However, early failure rates after ACL repair with suture ligament augmentation (SLA) remain high.

Purpose:: To compare surgical failure, functional outcomes, return to sport, and joint laxity between adolescents who underwent ACL repair with SLA and those who underwent ACL reconstruction with quadriceps tendon-patellar bone autograft (QPA). Read More

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http://dx.doi.org/10.1177/0363546518825255DOI Listing
February 2019
2 Reads

Tissue on the Transferred Coracoid Graft After Latarjet Procedure: Histological and Morphological Findings.

Am J Sports Med 2019 Feb 4:363546518819825. Epub 2019 Feb 4.

Alps Surgery Institute, Annecy, France.

Background:: Anterior shoulder instability is a debilitating condition that can require stabilization via a Latarjet procedure.

Purpose:: The aim of this study was to characterize the histological composition of the articular-sided surface of the coracoid bone graft after Latarjet procedure. Specific features of cells isolated from the coracoid and graft tissues were assessed. Read More

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http://dx.doi.org/10.1177/0363546518819825DOI Listing
February 2019
2 Reads

Ankle Lateral Ligament Augmentation Versus the Modified Broström-Gould Procedure: A 5-Year Randomized Controlled Trial.

Am J Sports Med 2019 Jan 30:363546518820529. Epub 2019 Jan 30.

Saint Vincent's Hospital, Darlinghurst, Australia.

Background:: "Ankle sprain" is a common injury, and >20% of patients may develop chronic instability for which surgery is indicated. The modified Broström-Gould (MBG) procedure remains the gold standard; however, there are a number of relative contraindications to this procedure, and the longer-term outcomes after the MBG have been questioned. An alternative procedure is augmentation of a primary repair with a ligament augmentation reconstruction system (LARS). Read More

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http://dx.doi.org/10.1177/0363546518820529DOI Listing
January 2019
1 Read

A Prospective Analysis of Patients With Anterior Versus Posterior Shoulder Instability: A Matched Cohort Examination and Surgical Outcome Analysis of 200 Patients.

Am J Sports Med 2019 Jan 30:363546518819199. Epub 2019 Jan 30.

The Steadman Clinic, Vail, Colorado, USA.

Background:: Anterior and posterior shoulder instabilities are entirely different entities. The presenting complaints and symptoms vastly differ between patients with these 2 conditions, and a clear understanding of these differences can help guide effective treatment.

Purpose:: To compare a matched cohort of patients with anterior and posterior instability to clearly outline the differences in the initial presenting history and overall outcomes after arthroscopic stabilization. Read More

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http://dx.doi.org/10.1177/0363546518819199DOI Listing
January 2019
6 Reads

Biomechanical Comparison of Ulnar Collateral Ligament Reconstruction With a Modified Docking Technique With and Without Suture Augmentation.

Am J Sports Med 2019 Jan 28:363546518820304. Epub 2019 Jan 28.

West Coast Sports Institute, San Francisco, California, USA.

Background:: Throwing athletes with ulnar collateral ligament (UCL) injury and symptomatic valgus instability can expect to return to the same or higher level of play. Reconstruction with tendon graft is the dominant method of surgical treatment. Recent evidence suggests that spanning the joint with a suture anchored on both sides is biomechanically equivalent to reconstruction, with faster time to return to play. Read More

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http://dx.doi.org/10.1177/0363546518820304DOI Listing
January 2019
2 Reads

Kinematics and Laxity of the Ankle Joint in Anatomic and Nonanatomic Anterior Talofibular Ligament Repair: A Biomechanical Cadaveric Study.

Am J Sports Med 2019 Jan 25:363546518820527. Epub 2019 Jan 25.

Department of Orthopaedic Surgery, School of Medicine, Sapporo Medical University, Sapporo, Japan.

Background:: Although it is crucial to accurately identify the anterior talofibular ligament (ATFL) attachment site, it may not be feasible to fully observe the ATFL attachment site during arthroscopic surgery. As a result, the repair position might often be an unintentionally nonanatomic ATFL attachment site.

Hypothesis:: Anatomic ATFL repair restores kinematics and laxity to the ankle joint, while nonanatomic ATFL repair does not. Read More

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http://dx.doi.org/10.1177/0363546518820527DOI Listing
January 2019
1 Read

The Development Process of Bipolar Bone Defects From Primary to Recurrent Instability in Shoulders With Traumatic Anterior Instability.

Am J Sports Med 2019 Jan 23:363546518819471. Epub 2019 Jan 23.

Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Suita, Japan.

Background:: Recurrence of glenohumeral joint instability after primary traumatic anterior instability is not rare, and bipolar bone loss is one of the most critical factors for recurrent instability, but the development process of bipolar bone defects is still unclear.

Purpose:: To investigate the development process of bipolar bone defects from primary to recurrent instability among shoulders with traumatic anterior instability evaluated at least twice by computed tomography (CT).

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

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http://dx.doi.org/10.1177/0363546518819471DOI Listing
January 2019

Partial Meniscectomy for Degenerative Medial Meniscal Root Tears Shows Favorable Outcomes in Well-Aligned, Nonarthritic Knees.

Am J Sports Med 2019 Jan 23:363546518819225. Epub 2019 Jan 23.

Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea.

Background:: Arthroscopic meniscectomy has been commonly performed for persistent pain caused by degenerative medial meniscal posterior root tears (MMPRTs). However, risk factors that affect long-term outcomes and joint survivorship after meniscectomy are unclear.

Purpose:: To identify the risk factors associated with end-stage osteoarthritis after arthroscopic meniscectomy for degenerative MMPRT for middle-aged or elderly patients and to determine the joint survivorship according to the identified risk factors. Read More

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http://dx.doi.org/10.1177/0363546518819225DOI Listing
January 2019
1 Read

Simvastatin With PRP Promotes Chondrogenesis of Bone Marrow Stem Cells In Vitro and Wounded Rat Achilles Tendon-Bone Interface Healing In Vivo.

Am J Sports Med 2019 Jan 22:363546518819108. Epub 2019 Jan 22.

Department of Orthopedics, Jinan Central Hospital Affiliated to Shandong University Medical School, Jinan, China.

Background:: Tendons and ligaments are joined to bone in a specialized interface that transmits force from muscle to bone and permits body movement. Tendon/ligament injuries always occur in the interface areas, and injured tendons/ligaments have a limited healing response because the insertion site is composed of a fibrocartilaginous zone.

Purpose:: To study the effect of simvastatin with platelet-rich plasma (PRP) on chondrogenesis of rat bone marrow stem cells (BMSCs) in vitro and wounded rat Achilles tendon-bone interface healing in vivo. Read More

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http://dx.doi.org/10.1177/0363546518819108DOI Listing
January 2019
1 Read
4.362 Impact Factor

Hip Arthroscopic Management Can Improve Osteitis Pubis and Bone Marrow Edema in Competitive Soccer Players With Femoroacetabular Impingement.

Am J Sports Med 2019 Jan 21:363546518819099. Epub 2019 Jan 21.

Department of Orthopaedic Surgery and Sports Medicine, Wakamatsu Hospital of the University of Occupational and Environmental Health, Kitakyushu, Japan.

Background:: There is a dearth of knowledge regarding the correlation between femoroacetabular impingement (FAI) and osteitis pubis (OP) among symptomatic soccer players.

Purpose:: To elucidate whether arthroscopic FAI correction is effective for young competitive soccer players with FAI combined with OP or perisymphyseal pubic bone marrow edema (BME).

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

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http://journals.sagepub.com/doi/10.1177/0363546518819099
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http://dx.doi.org/10.1177/0363546518819099DOI Listing
January 2019
6 Reads

Steep Posterior Tibial Slope, Anterior Tibial Subluxation, Deep Posterior Lateral Femoral Condyle, and Meniscal Deficiency Are Common Findings in Multiple Anterior Cruciate Ligament Failures: An MRI Case-Control Study.

Am J Sports Med 2019 Jan 18:363546518823544. Epub 2019 Jan 18.

II Clinica Ortopedica e Traumatologica, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.

Background:: Tibiofemoral anatomic parameters, such as tibial slope, femoral condyle shape, and anterior tibial subluxation, have been suggested to increase the risk of anterior cruciate ligament (ACL) reconstruction failure. However, such features have never been assessed among patients experiencing multiple failures of ACL reconstruction.

Purpose:: To compare the knee anatomic features of patients experiencing a single failure of ACL reconstruction with those experiencing multiple failures or with intact ACL reconstruction. Read More

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http://dx.doi.org/10.1177/0363546518823544DOI Listing
January 2019
1 Read

Decreased Posterior Tibial Slope Does Not Affect Postoperative Posterior Knee Laxity After Double-Bundle Posterior Cruciate Ligament Reconstruction.

Am J Sports Med 2019 Jan 18:363546518819786. Epub 2019 Jan 18.

The Steadman Clinic, Vail, Colorado, USA.

Background:: Recent clinical studies identified sagittal plane posterior tibial slope as a risk factor for increased postoperative laxity after single-bundle posterior cruciate ligament reconstruction (PCLR).

Purpose/hypothesis:: To retrospectively compare the degree of posterior tibial slope and its effect on posterior tibial translation (PTT) after double-bundle (DB) PCLR. Our null hypothesis was that preoperative tibial slope would not be associated with graft laxity. Read More

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http://dx.doi.org/10.1177/0363546518819786DOI Listing
January 2019
2 Reads

Influence of Baseline Magnetic Resonance Imaging Features on Outcome of Arthroscopic Meniscectomy and Physical Therapy Treatment of Meniscal Tears in Osteoarthritis.

Am J Sports Med 2019 Jan 17:363546518819444. Epub 2019 Jan 17.

Investigation performed at Brigham and Women's Hospital, Boston, Massachusetts, USA.

Background:: Arthroscopic partial meniscectomy (APM) is used to treat meniscal tears, although its efficacy is controversial.

Purpose:: This study used magnetic resonance imaging (MRI) to determine characteristics that lead to greater benefit from APM and physical therapy (PT) than from PT alone among patients with meniscal tear and knee osteoarthritis.

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

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http://dx.doi.org/10.1177/0363546518819444DOI Listing
January 2019
2 Reads
4.362 Impact Factor

Osteointegration of a Novel Silk Fiber-Based ACL Scaffold by Formation of a Ligament-Bone Interface.

Am J Sports Med 2019 Jan 17:363546518818792. Epub 2019 Jan 17.

Austrian Cluster for Tissue Regeneration, Vienna, Austria.

Background:: Given the unsatisfactory results and reported drawbacks of anterior cruciate ligament (ACL) reconstruction, such as donor site morbidity and the limited choice of grafts in revision surgery, new regenerative approaches based on tissue-engineering strategies are currently under investigation.

Purposes:: To determine (1) if a novel silk fiber-based ACL scaffold is able to initiate osteointegration in the femoral and tibial bone tunnels under in vivo conditions and (2) if the osteointegration process will be improved by intraoperatively seeding the scaffolds with the autologous stromal vascular fraction, an adipose-derived, stem cell-rich isolate from knee fat pads.

Study Design:: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546518818792DOI Listing
January 2019
5 Reads
4.362 Impact Factor

Age-Appropriate Pediatric Sports Patient-Reported Outcome Measures and Their Psychometric Properties: A Systematic Review.

Am J Sports Med 2019 Jan 16:363546518818822. Epub 2019 Jan 16.

Investigation performed at the Hospital for Special Surgery, New York, New York, USA.

Background:: Phenomena including early sport specialization and year-round training and competition have contributed to an increase in pediatric sports injuries. There has been a concomitant increase in clinical studies focusing on physically active children and adolescents. These studies include investigations of patient-reported outcome measures (PROMs). Read More

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http://dx.doi.org/10.1177/0363546518818822DOI Listing
January 2019
6 Reads

Risk Factors for Lateral Meniscus Posterior Root Tears in the Anterior Cruciate Ligament-Injured Knee: An Epidemiological Analysis of 3956 Patients From the SANTI Study Group.

Am J Sports Med 2019 Jan 16:363546518818820. Epub 2019 Jan 16.

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

Background:: Lateral meniscus posterior root tears (LMPRTs) result in loss of hoop forces and significant increases in tibiofemoral contact pressures. Preoperative imaging lacks reliability; therefore, holding an appropriate index of suspicion, based on the epidemiology of and risk factors for LMPRT, may reduce the rate of missed diagnoses.

Purpose:: The primary objectives of this study were to evaluate the incidence of and risk factors for lateral meniscus root lesions in a large series of patients undergoing anterior cruciate ligament (ACL) reconstruction. Read More

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http://dx.doi.org/10.1177/0363546518818820DOI Listing
January 2019
2 Reads
4.362 Impact Factor

Expectations for Return to Preinjury Sport Before and After Anterior Cruciate Ligament Reconstruction.

Am J Sports Med 2019 Jan 16:363546518819454. Epub 2019 Jan 16.

OrthoSport Victoria, Epworth HealthCare, Melbourne, Australia.

Background:: There is limited information about patient expectations regarding return to sport after anterior cruciate ligament reconstruction (ACLR). While it has generally been assumed that patients expect to return, it has also been acknowledged that expectations may change after surgery.

Purpose:: To investigate return-to-sport expectations before and after ACLR and determine factors associated with changed expectations. Read More

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http://dx.doi.org/10.1177/0363546518819454DOI Listing
January 2019
2 Reads

Return to Sport and Reoperation Rates in Patients Under the Age of 20 After Primary Anterior Cruciate Ligament Reconstruction: Risk Profile Comparing 3 Patient Groups Predicated Upon Skeletal Age.

Am J Sports Med 2019 Jan 15:363546518819217. Epub 2019 Jan 15.

Pediatric Orthopaedic Surgery Service, Hospital for Special Surgery, New York, New York, USA.

Background:: With sports specialization and level of competition on the rise, anterior cruciate ligament reconstruction (ACLR) in athletes under the age of 20 has increased significantly in recent years. Reports have demonstrated that the revision ACLR rate is higher and return to sport (RTS) rate is lower in this population.

Purpose:: To evaluate the 2-year clinical outcomes of 3 cohorts of primary ACLR in pediatric and adolescent athletes under the age of 20 based on skeletal age with a focus on RTS and the incidence of second surgery. Read More

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http://dx.doi.org/10.1177/0363546518819217DOI Listing
January 2019
4 Reads

Comparison of Undifferentiated Versus Chondrogenic Predifferentiated Mesenchymal Stem Cells Derived From Human Umbilical Cord Blood for Cartilage Repair in a Rat Model.

Am J Sports Med 2019 Jan 14:363546518815151. Epub 2019 Jan 14.

Department of Orthopedic Surgery, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Republic of Korea.

Background:: Human umbilical cord blood-derived mesenchymal stem cells (hUCB-MSCs) have gained much interest as a promising cell source for regenerative medicine owing to the noninvasive collection, availability, high expansion capacity, and low immunogenicity. However, few in vivo studies have reported the use of hUCB-MSCs on cartilage repair. Moreover, little study has been conducted on the effects of chondrogenic predifferentiation of hUCB-MSCs on cartilage repair. Read More

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http://dx.doi.org/10.1177/0363546518815151DOI Listing
January 2019
7 Reads

Anatomic Features of the Tibial Plateau Predict Outcomes of ACL Reconstruction Within 7 Years After Surgery.

Am J Sports Med 2019 Jan 14:363546518823556. Epub 2019 Jan 14.

Department of Orthopaedics, Rhode Island Hospital, Providence, Rhode Island, USA.

Background:: Multiple anatomic features of the femoral condyles and tibial plateau have been shown to influence knee biomechanics and risk of anterior cruciate ligament (ACL) injury. However, it remains unclear how these anatomic factors affect the midterm outcomes of ACL reconstruction.

Hypothesis:: Decreased femoral notch width, increased posterior and coronal slopes, and decreased concavity of the tibial plateau are associated with inferior clinical, patient-reported, and osteoarthritis-related outcomes 7 years after ACL reconstruction. Read More

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http://dx.doi.org/10.1177/0363546518823556DOI Listing
January 2019
2 Reads

Tibial Slope and Its Effect on Force in Anterior Cruciate Ligament Grafts: Anterior Cruciate Ligament Force Increases Linearly as Posterior Tibial Slope Increases.

Am J Sports Med 2019 Jan 14:363546518820302. Epub 2019 Jan 14.

The Steadman Clinic, Vail, Colorado, USA.

Background:: Previous work has reported that increased tibial slope is directly correlated with increased anterior tibial translation, possibly predisposing patients to higher rates of anterior cruciate ligament (ACL) tears and causing higher rates of ACL graft failures over the long term. However, the effect of changes in sagittal plane tibial slope on ACL reconstruction (ACLR) graft force has not been well defined.

Purpose/hypothesis:: The purpose of this study was to quantify the effect of changes in sagittal plane tibial slope on ACLR graft force at varying knee flexion angles. Read More

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http://dx.doi.org/10.1177/0363546518820302DOI Listing
January 2019
1 Read

Clinical Outcomes of Isolated Revision Anterior Cruciate Ligament Reconstruction or in Combination With Anatomic Anterolateral Ligament Reconstruction.

Am J Sports Med 2019 Jan 14:363546518815888. Epub 2019 Jan 14.

Department of Orthopaedic Surgery, Konkuk University Medical Center, Seoul, Republic of Korea.

Background:: Although the cause of rotational instability after revision anterior cruciate ligament reconstruction (ACLR) is multifactorial, the rationale of adding an extra-articular procedure is based on its ability to restrict rotational instability.

Purpose:: To assess the effect of anterolateral ligament (ALL) reconstruction on revision ACLR.

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

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http://dx.doi.org/10.1177/0363546518815888DOI Listing
January 2019
2 Reads

Challenging the Current Concept of Critical Glenoid Bone Loss in Shoulder Instability: Does the Size Measurement Really Tell It All?

Am J Sports Med 2019 Jan 14:363546518819102. Epub 2019 Jan 14.

Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Berlin, Germany.

Background:: Bone loss at the anterior glenoid rim is a main reason for failure of soft-tissue based surgical stabilization procedures in patients with anterior shoulder instability.

Purpose:: To evaluate the capability of conventional glenoid bone loss measurement techniques to provide an adequate estimation of the actual biomechanical effect of glenoid defects.

Study Design:: Descriptive laboratory study. Read More

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http://dx.doi.org/10.1177/0363546518819102DOI Listing
January 2019
2 Reads

Posterior Tibial Slope and Risk of Posterior Cruciate Ligament Injury.

Am J Sports Med 2019 Jan 14:363546518819176. Epub 2019 Jan 14.

The Steadman Clinic, Vail, Colorado, USA.

Background:: Recent biomechanical studies have identified sagittal plane posterior tibial slope as a potential risk factor for posterior cruciate ligament (PCL) injury because of its effects on the kinematics of the native and surgically treated knee. However, the literature lacks clinical correlation between primary PCL injuries and decreased posterior tibial slope.

Purpose/hypothesis:: The purpose of this study was to retrospectively compare the amount of posterior tibial slope between patients with PCL injuries and age/sex-matched controls with intact PCLs. Read More

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http://dx.doi.org/10.1177/0363546518819176DOI Listing
January 2019
2 Reads

Short-term Changes After Corticosteroid Injections Into the Normal Tendons of Rabbits: A Controlled Randomized Study.

Am J Sports Med 2019 Jan 14:363546518818819. Epub 2019 Jan 14.

University Hospital of Botucatu Medical School, Paulista State University, Botucatu, Brazil.

Background:: Corticosteroid injections in or around tendons for the treatment of athletic injuries are a common practice among orthopaedic surgeons and are apparently efficacious in the short term, although controversies persist related to local complications.

Purpose:: This study evaluated short-term (48 hours) biomechanical, biochemical, and histological alterations after a single injection of betamethasone into the normal tendons of rabbits.

Study Design:: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546518818819DOI Listing
January 2019
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Delamination Does Not Affect Outcomes After Arthroscopic Rotator Cuff Repair as Compared With Nondelaminated Rotator Cuff Tears: A Study of 1043 Consecutive Cases.

Am J Sports Med 2019 Jan 10:363546518817764. Epub 2019 Jan 10.

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

Background:: Limited information is available regarding the characteristics of delaminated rotator cuff tears as compared with nondelaminated tears. Furthermore, there is conflicting information regarding the effects of delamination on the anatomic healing of repaired cuffs.

Purpose:: To evaluate the characteristics and anatomic outcomes of delaminated rotator cuff tears in comparison with nondelaminated tears to determine whether delamination is a negative prognostic factor affecting rotator cuff repair outcomes. Read More

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http://dx.doi.org/10.1177/0363546518817764DOI Listing
January 2019
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Effects of Estrogen-Deficient State on Rotator Cuff Healing.

Am J Sports Med 2019 Jan 9:363546518815869. Epub 2019 Jan 9.

Department of Orthopaedic Surgery, Kurume University School of Medicine, Kurume, Japan.

Background:: Rotator cuff retears after surgical repair are a concern, despite advances in operative techniques, but few studies have investigated the effects of the estrogen-deficient state on tendon-to-bone healing at the repair site.

Purpose:: We evaluated the effect of the estrogen-deficient state on tendon-to-bone healing after rotator cuff repair in an ovariectomized rat model.

Study Design:: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546518815869DOI Listing
January 2019
5 Reads

Osteochondral Autograft Transplantation Technique Augmented by an Ultrapurified Alginate Gel Enhances Osteochondral Repair in a Rabbit Model.

Am J Sports Med 2019 Jan 9:363546518817527. Epub 2019 Jan 9.

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

Background:: One of the most important limitations of osteochondral autograft transplantation (OAT) is the adverse effect on donor sites in the knee. To decrease the number and/or size of osteochondral defects, we devised a method with biomaterial implantation after OAT.

Hypothesis:: OAT augmented by ultrapurified alginate (UPAL) gel enhances cartilage repair capacity. Read More

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http://dx.doi.org/10.1177/0363546518817527DOI Listing
January 2019
6 Reads

Delayed ACL Reconstruction in Patients ≥40 Years of Age Is Associated With Increased Risk of Medial Meniscal Injury at 1 Year.

Am J Sports Med 2019 Jan 9:363546518817749. Epub 2019 Jan 9.

Tufts Medical Center, Boston, Massachusetts, USA.

Background:: Anterior cruciate ligament (ACL) tears in the pediatric and young adult ACL-deficient knee are often associated with meniscal or chondral injury with delayed time to surgery. The incidence of ACL reconstruction performed in patients aged ≥40 years is rising, and it is unclear if delayed surgery in this cohort similarly affects the health of the meniscus and cartilage.

Purpose:: To evaluate whether delayed reconstruction in a cohort of patients aged ≥40 years is associated with an increased risk of meniscal or chondral injury. Read More

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http://dx.doi.org/10.1177/0363546518817749DOI Listing
January 2019
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Major League Baseball Pitching Performance After Tommy John Surgery and the Effect of Tear Characteristics, Technique, and Graft Type.

Am J Sports Med 2019 Jan 9:363546518817750. Epub 2019 Jan 9.

Kerlan Jobe Orthopaedic Clinic, Los Angeles, California, USA.

Background:: Return to play and player satisfaction have been quite high after ulnar collateral ligament reconstruction (UCLR); however, there has been little reported on how outcomes are affected by surgical technique, graft type, and tear characteristics.

Purpose:: To evaluate surgical techniques, graft type, and tear characteristics on Major League Baseball (MLB) performance after UCLR.

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

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http://dx.doi.org/10.1177/0363546518817750DOI Listing
January 2019
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Biomechanical Comparison of 3 Novel Repair Techniques for Radial Tears of the Medial Meniscus: The 2-Tunnel Transtibial Technique, a "Hybrid" Horizontal and Vertical Mattress Suture Configuration, and a Combined "Hybrid Tunnel" Technique.

Am J Sports Med 2019 Jan 9:363546518816949. Epub 2019 Jan 9.

Steadman Philippon Research Institute, Vail, Colorado, USA.

Background:: Historically, radial meniscal tears were treated with partial or near-total meniscectomy, which usually resulted in poor outcomes. Radial meniscal tears function similar to a total meniscectomy and are challenging to treat. Repair of radial meniscal tears should be performed to prevent joint deterioration and the need for salvage procedures in the future. Read More

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http://dx.doi.org/10.1177/0363546518816949DOI Listing
January 2019
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Responsiveness and Minimal Important Change of the IKDC of Middle-Aged and Older Patients With a Meniscal Tear.

Am J Sports Med 2019 Jan 4:363546518812880. Epub 2019 Jan 4.

Investigation performed at Department of Orthopaedic Surgery, OLVG Amsterdam, Amsterdam, the Netherlands.

Background:: Responsiveness and the minimal important change (MIC) are important measurement properties to evaluate treatment effects and to interpret clinical trial results. The International Knee Documentation Committee (IKDC) Subjective Knee Form is a reliable and valid instrument for measuring patient-reported knee-specific symptoms, functioning, and sports activities in a population with meniscal tears. However, evidence on responsiveness is of limited methodological quality, and the MIC has not yet been established for patients with symptomatic meniscal tears. Read More

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http://dx.doi.org/10.1177/0363546518812880DOI Listing
January 2019
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Outcomes With a Focus on Return to Play for Revision Ulnar Collateral Ligament Surgery Among Elite-Level Baseball Players: A Systematic Review.

Am J Sports Med 2018 Dec 31:363546518816960. Epub 2018 Dec 31.

Department of Orthopaedics and Sports Medicine, University of Cincinnati, Cincinnati, OH, USA.

Background:: Ulnar collateral ligament (UCL) reconstruction is commonly performed among overhead throwing athletes. Previous studies demonstrated relatively high rates of return to sport after primary reconstruction. Outcomes after revision UCL reconstruction have not been widely studied. Read More

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http://dx.doi.org/10.1177/0363546518816960DOI Listing
December 2018
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Effects of Ultra-Purified Alginate Gel Implantation on Meniscal Defects in Rabbits.

Am J Sports Med 2018 Dec 31:363546518816690. Epub 2018 Dec 31.

Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.

Background:: Many tissue-engineered methods for meniscal repair have been studied, but their utility remains unclear.

Hypothesis:: Implantation of low-endotoxin, ultra-purified alginate (UPAL) gel without cells could induce fibrocartilage regeneration on meniscal defects in rabbits.

Study Design:: Controlled laboratory study. Read More

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http://dx.doi.org/10.1177/0363546518816690DOI Listing
December 2018
3 Reads

Hip Joint Torsional Loading Before and After Cam Femoroacetabular Impingement Surgery.

Am J Sports Med 2018 Dec 31:363546518815159. Epub 2018 Dec 31.

Department of Mechanical Engineering, Imperial College London, London, UK.

Background:: Surgical management of cam femoroacetabular impingement (FAI) aims to preserve the native hip and restore joint function, although it is unclear how the capsulotomy, cam deformity, and capsular repair influence joint mechanics to balance functional mobility.

Purpose:: To examine the contributions of the capsule and cam deformity to hip joint mechanics. Using in vitro, cadaveric methods, we examined the individual effects of the surgical capsulotomy, cam resection, and capsular repair on passive range of motion and resistance of applied torque. Read More

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http://dx.doi.org/10.1177/0363546518815159DOI Listing
December 2018
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Superior Capsule Reconstruction for Reinforcement of Arthroscopic Rotator Cuff Repair Improves Cuff Integrity.

Am J Sports Med 2018 Dec 31:363546518816689. Epub 2018 Dec 31.

Department of Orthopedic Surgery, Osaka Medical College, Takatsuki, Japan.

Background:: Retear of repaired rotator cuff tendons worsens patient outcome and decreases patient satisfaction. Superior capsule reconstruction (SCR) was developed to center the humeral head and thus restore the force couple for patients with rotator cuff tears.

Purpose:: To evaluate whether SCR for reinforcement before arthroscopic rotator cuff repair (ARCR) improves cuff integrity. Read More

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http://dx.doi.org/10.1177/0363546518816689DOI Listing
December 2018
1 Read

Comparison of Clinical and Radiographic Outcomes of Vertical Simple Stitch Versus Modified Mason-Allen Stitch in Arthroscopic Bankart Repairs: A Prospective Randomized Controlled Study.

Am J Sports Med 2018 Dec 31:363546518816679. Epub 2018 Dec 31.

Center for Shoulder, Elbow and Sports Medicine, Neon Orthopaedic Clinic, Seoul, Republic of Korea.

Background:: In spite of the probable advantages of Bankart repair with modified Mason-Allen technique, there has been no study to evaluate the clinical outcomes of the modified Mason-Allen technique for Bankart repair.

Purpose:: To prospectively compare the anatomic and clinical outcomes between the vertical simple stitch and the modified Mason-Allen stitch with respect to the labral height, retear rate, redislocation/apprehension, and various functional outcome scores.

Study Design:: Randomized controlled trial; Level of evidence, 2. Read More

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http://dx.doi.org/10.1177/0363546518816679DOI Listing
December 2018
1 Read
4.362 Impact Factor

Effect of Penalty Minute Rule Change on Injuries and Game Disqualification Penalties in High School Ice Hockey.

Am J Sports Med 2018 Dec 20:363546518815886. Epub 2018 Dec 20.

Department of Emergency Medicine, Warren Alpert Medical School, Brown University, Rhode Island Hospital/Hasbro Children's Hospital, Providence, Rhode Island, USA.

Background:: Recent efforts have focused on eliminating dangerous hits in ice hockey. Fair play rule changes have successfully reduced injury risk but have not been widely implemented.

Purpose:: To determine the effect of a penalty infraction minutes (PIM) rule change in high school boys' ice hockey on injuries and game disqualification penalties. Read More

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http://dx.doi.org/10.1177/0363546518815886DOI Listing
December 2018
3 Reads