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Does Extended Preoperative Rehabilitation Influence Outcomes 2 Years After ACL Reconstruction?: A Comparative Effectiveness Study Between the MOON and Delaware-Oslo ACL Cohorts
Conclusion: The cohort treated with additional preoperative rehabilitation consisting of progressive strengthening and neuromuscular training, followed by a criterion-based postoperative rehabilitation program, had greater functional outcomes and RTS rates 2 years after ACLR. Preoperative rehabilitation should be considered as an addition to the standard of care to maximize functional outcomes after ACLR. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Failla, M. J., Logerstedt, D. S., Grindem, H., Axe, M. J., Risberg, M. A., Engebretsen, L., Huston, L. J., Spindler, K. P., Snyder-Mackler, L. Tags: Knee ligaments, ACL, Physical therapy/Rehabilitation Source Type: research

Is There a Difference in Graft Motion for Bone-Tendon-Bone and Hamstring Autograft ACL Reconstruction at 6 Weeks and 1 Year?
Conclusion: During walking and stair descent, ACL reconstruction using suspensory fixation yielded no difference between graft types in femoral or tibial tunnel motion at 6 weeks or 1 year. All subjects were asymptomatic with knee kinematics similar to that of the literature. The significance of persistent, small (1 to 3 mm) movements at 1 year for healing or graft performance is unknown. Clinical Relevance: These study results may have significant implications for graft choice, rehabilitation strategies, and timing for return to sports. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Irvine, J. N., Arner, J. W., Thorhauer, E., Abebe, E. S., DAuria, J., Schreiber, V. M., Harner, C. D., Tashman, S. Tags: Knee ligaments, ACL Source Type: research

Morphologic Characteristics and Strength of the Hamstring Muscles Remain Altered at 2 Years After Use of a Hamstring Tendon Graft in Anterior Cruciate Ligament Reconstruction
Conclusion: The muscle-tendon properties of the semitendinosus and gracilis are substantially altered after harvesting, and these alterations may contribute to knee flexor weakness in the surgical limb. These deficits are more pronounced in knees with tendons that do not regenerate and are only partially offset by compensatory hypertrophy of other hamstring muscles. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Konrath, J. M., Vertullo, C. J., Kennedy, B. A., Bush, H. S., Barrett, R. S., Lloyd, D. G. Tags: Biomechanics, general, Knee ligaments, ACL, Imaging, magnetic resonance, Medical aspects of sports Source Type: research

Irradiated Hamstring Tendon Allograft Versus Autograft for Anatomic Double-Bundle Anterior Cruciate Ligament Reconstruction: Midterm Clinical Outcomes
Conclusion: There were no significant differences in postoperative activity levels and functional outcomes between the Auto and Ir-Allo groups. However, a significant increase in anterior and rotational laxity in the Ir-Allo group was found according to evaluations. We do not advocate an irradiated hamstring tendon allograft for DB ACLR. Trial Registration: Clinical Trial Register System of The Affiliated Hospital of Qingdao University (qdfy-ky2008-12) (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Tian, S., Wang, B., Liu, L., Wang, Y., Ha, C., Li, Q., Yang, X., Sun, K. Tags: Knee ligaments, ACL, Allografts Source Type: research

Early Viscosupplementation After Anterior Cruciate Ligament Reconstruction: A Randomized Controlled Trial
Conclusion: The study documented no adverse events and had some positive findings in terms of active ROM recovery and transpatellar circumference reduction. However, the early postoperative application of viscosupplementation did not lead to significant improvement in clinical scores after ACL reconstruction. Registration: NCT02630407 (ClinicalTrials.gov identifier), (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Di Martino, A., Tentoni, F., Di Matteo, B., Cavicchioli, A., Lo Presti, M., Filardo, G., Zaffagnini, S., Marcacci, M., Kon, E. Tags: Growth factors/Healing enhancement, Knee ligaments, ACL Source Type: research

ACL Fibers Near the Lateral Intercondylar Ridge Are the Most Load Bearing During Stability Examinations and Isometric Through Passive Flexion
Conclusion: ACL fibers located high within the femoral footprint bear more force during stability testing and are more isometric during flexion than low fibers. Clinical Relevance: It may be advantageous to create a "higher" femoral tunnel during ACL reconstruction at the lateral intercondylar ridge. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Nawabi, D. H., Tucker, S., Schafer, K. A., Zuiderbaan, H. A., Nguyen, J. T., Wickiewicz, T. L., Imhauser, C. W., Pearle, A. D. Tags: Biomechanics, ligament, Knee ligaments, ACL Source Type: research

In Vivo Length Changes of the Anterolateral Ligament and Related Extra-articular Reconstructions
Conclusion: An anatomic ALL reconstruction as modeled based on recent anatomic studies was not isometric during in vivo knee flexion and was not affected by ACL deficiency. The nonanatomic extra-articular reconstructions demonstrated more biomechanically favorable length change patterns with the smallest percentage increase in elongation during knee flexion. Clinical Relevance: This study presents the first in vivo biomechanical data on the ALL, in both healthy and ACL-deficient knees, and provides surgical information that may be valuable for restoring normal anterolateral stability. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Van de Velde, S. K., Kernkamp, W. A., Hosseini, A., LaPrade, R. F., van Arkel, E. R., Li, G. Tags: Biomechanics, ligament, Knee ligaments, general, Knee ligaments, ACL, Knee ligaments, lateral/posterolateral ligaments Source Type: research

Anatomic Anterolateral Ligament Reconstruction of the Knee Leads to Overconstraint at Any Fixation Angle
Conclusion: Anatomic ALLR in conjunction with an ACLR significantly reduced rotatory laxity of the knee beyond 30° of knee flexion. However, ALLR, regardless of fixation angle, resulted in significant overconstraint of the knee. Clinical Relevance: ALLR at any fixation angle overconstrained native joint kinematics and should be performed with careful consideration. Further investigation into the application and target population for ALLR is strongly recommended. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Schon, J. M., Moatshe, G., Brady, A. W., Serra Cruz, R., Chahla, J., Dornan, G. J., Turnbull, T. L., Engebretsen, L., LaPrade, R. F. Tags: Biomechanics, ligament, Knee ligaments, ACL, Knee ligaments, lateral/posterolateral ligaments Source Type: research

Geometric Risk Factors Associated With Noncontact Anterior Cruciate Ligament Graft Rupture
Conclusion: The geometric risk factors for ACL graft rupture are different for males and females. For females, a decreased femoral intercondylar notch width and a decreased height of the posterior medial meniscus were risk factors for ACL graft rupture that have also been found to be risk factors for first-time injury. There were no risk factors in common between ACL graft injury and first-time ACL injury for males. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Levins, J. G., Sturnick, D. R., Argentieri, E. C., Gardner-Morse, M., Vacek, P. M., Desarno, M. J., Tourville, T. W., Slauterbeck, J. R., Beynnon, B. D. Tags: Biomechanics, ligament, Injury prevention, Knee, general, Knee ligaments, ACL Source Type: research

Clinical Outcomes of Hip Arthroscopy in Radiographically Diagnosed Retroverted Acetabula
Conclusion: This study demonstrates that hip arthroscopy can successfully treat femoroacetabular impingement associated with a globally retroverted acetabulum at a minimum 2-year follow-up. Survivorship was 99% at 2 years, with 1 patient requiring further surgery in the form of hip arthroplasty. There was no noted progression of Tönnis grade at final follow-up. The procedure was extremely safe, with a minor complication rate of 3.6%. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Hartigan, D. E., Perets, I., Walsh, J. P., Close, M. R., Domb, B. G. Tags: Hip arthroscopy, Articular cartilage resurfacing Hip and Thigh Source Type: research

Are Short-term Outcomes of Hip Arthroscopy in Patients 55 Years and Older Inferior to Those in Younger Patients?
Conclusion: Although younger patients had superior HOS outcomes reported at 2 years compared with older patients after hip arthroscopy for FAI, both groups had significant improvement compared with their baseline. These data suggest that carefully selected patients 55 years and older without radiographic arthritis may benefit from hip arthroscopy. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Bryan, A. J., Krych, A. J., Pareek, A., Reardon, P. J., Berardelli, R., Levy, B. A. Tags: Hip/Pelvis/Thigh, Hip, femoroactabular impingement, Hip arthroscopy Hip and Thigh Source Type: research

Patient Characteristics and Early Functional Outcomes of Combined Arthroscopic Labral Refixation and Periacetabular Osteotomy for Symptomatic Acetabular Dysplasia
Conclusion: Patients undergoing combined arthroscopic labral refixation and PAO were older and had increased acetabular anteversion versus patients undergoing PAO alone. Combined arthroscopic labral refixation and PAO was safe, did not affect PAO operative time or radiographic correction achievement, and may benefit clinical outcomes in this patient subset. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Ricciardi, B. F., Mayer, S. W., Fields, K. G., Wentzel, C., Kelly, B. T., Sink, E. L. Tags: Hip/Pelvis/Thigh, Hip, femoroactabular impingement, Hip arthroscopy, Osteotomy Hip and Thigh Source Type: research

Clinical Outcomes of Hip Arthroscopic Surgery: A Prospective Survival Analysis of Primary and Revision Surgeries in a Large Mixed Cohort
Conclusion: Patients showed significant improvement in all PRO, VAS, and satisfaction scores at 2 years after hip arthroscopic surgery. Patients who underwent primary arthroscopic surgery showed higher PRO scores and a trend toward greater improvement in the VAS score compared with patients who underwent revision arthroscopic surgery. The relative risk of THA/HR was 2.0 after revision procedures compared with primary procedures. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Domb, B. G., Gui, C., Hutchinson, M. R., Nho, S. J., Terry, M. A., Lodhia, P. Tags: Hip/Pelvis/Thigh, Hip, femoroactabular impingement, Hip arthroscopy Hip and Thigh Source Type: research

Revision Hip Arthroscopy: A Matched-Cohort Study Comparing Revision to Primary Arthroscopy Patients
Conclusion: Patients who underwent revision hip arthroscopic surgery had significant improvement in outcome scores but did have lower scores compared with patients with primary hip arthroscopies. Patients with ≥2 revisions had lower outcomes. Improvement in the revision cohort was seen in patients with increased joint space, no prior labral repair, and capsular plication at revision. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Newman, J. T., Briggs, K. K., McNamara, S. C., Philippon, M. J. Tags: Hip/Pelvis/Thigh, Hip, femoroactabular impingement, Hip arthroscopy Hip and Thigh Source Type: research

Are Female Soccer Players at an Increased Risk of Second Anterior Cruciate Ligament Injury Compared With Their Athletic Peers?
Conclusion: Twenty-eight percent of all female soccer players and 34% of those players who returned to soccer had a second ACL tear. Soccer players had an increased rate of both graft tear and contralateral ACL injury compared with similar non-soccer athletes. Older age and return to soccer were significant risk factors for graft rupture. (Source: The American Journal of Sports Medicine)
Source: The American Journal of Sports Medicine - September 29, 2016 Category: Sports Medicine Authors: Allen, M. M., Pareek, A., Krych, A. J., Hewett, T. E., Levy, B. A., Stuart, M. J., Dahm, D. L. Tags: Knee ligaments, ACL, Female athlete, Football (Soccer) Epidemiology and Injury Prevention Source Type: research