The Effect of ACL Reconstruction on Involved and Contralateral Limb Vastus Lateralis Morphology and Histology: A Pilot Study
J Knee Surg DOI: 10.1055/s-0039-1697899Quadriceps muscle weakness is a commonly reported issue post anterior cruciate ligament reconstruction (ACLR), with minimal information related to skeletal muscle morphology following surgery. The purpose is to examine the morphological and functional differences in the vastus lateralis muscle from patient's ACLR and contralateral leg. Three physically active ACLR participants were recruited and secured to a dynamometer to perform maximal voluntary isometric knee extension contractions (MVIC) of the ACLR and contralateral limb. Muscle biopsies of the ACLR and contralateral vastus lateralis were performed, then sectioned, and stained for myosin isoforms to determine fiber type. Confocal images were acquired, and ImageJ software was used to determine the fiber type and cross-sectional area (CSA). There was a significant reduction in CSA of the type IIa and type IIx muscle fiber cells between healthy (IIa: 7,718 ± 1,295 µm2; IIx; 5,800 ± 601 µm2) and ACLR legs (IIa: 4,139 ± 709 µm2; IIx: 3,708 ± 618 µm2) (p
ConclusionIt was concluded that improving the design of a Mg-based screw may increase surgical success rates, by decreasing device failure at insertion.The translational potential of this articleThe results of this work have the potential to improve designs of degradable IFSs, allowing for greater torque to be applied and thus greater screw fixation between host bone and the graft. Such a fixation will allow greater integration, better patient healing, and ultimately improved patient outcomes.
ConclusionsThe femoral tunnel positions created by the TT technique were significantly higher, with larger variance, than the TP technique in double-bundle ACL reconstruction, although the positions seemed to be within anatomical footprint. In addition, there were several cases in which femoral tunnels could not be created at the intended position by the TT technique.Level of evidenceI
ConclusionsPostoperative quadriceps strength index at 6 months after double-bundle ACL reconstruction with hamstring tendon autografts was affected by preoperative quadriceps strength index. Adequate preoperative quadriceps strength may need to be considered in order to facilitate better recovery of quadriceps strength after ACL reconstruction and to s upport an earlier return to sports activities.
ConclusionBimeniscal replacement by an allograft and/or substitute provides good short-term functional and anatomical outcomes. Nevertheless, this procedure is warranted only in highly selected patients.Level of evidenceIV, retrospective study.
Publication date: Available online 11 October 2019Source: Arthroscopy TechniquesAuthor(s): Gun Min Youn, Angelica Marie Remigio Van Gogh, Alyssa Alvarez, Sophia Sarang Shin Yin, Moyukh O. Chakrabarti, Patrick J. McGahan, James L. ChenAbstractAnterior cruciate ligament (ACL) tears are unfortunate but common injuries in the athletic population. The standard of care for ACL tears is a surgical intervention to reconstruct the ACL to restore knee functionality as well as quality of life. In recent years, bone marrow aspirate concentrate (BMAC) has seen increasing use in various orthopaedic settings. This increase can be attribu...
ConclusionsPreoperative smoking was found to be an independent risk factor for complications for several arthroscopic procedures, though with variability between specific procedures.
Conditions: Anterior Cruciate Ligament Injuries; Ligament; Rupture, Knee, Spontaneous; Tendon Graft; Complication, Mechanical Interventions: Procedure: Patella tendon&bone block autograft + press-fit femoral technique; Procedure: Arthroscopic ACL reconstruction; Device: Hamstring tendon autograft + implant fixation Sponsor: Indonesia University Completed
Conclusions: Approximately 1 in 6 pediatric ACLR patients underwent ≥1 repeat surgery within 3 postoperative years for indications ranging from wound breakdown to contralateral ACL rupture. While previous studies revealed high rates of complication after pediatric ACLR due primarily to graft failure, we found that re-tear is responsible for less than half of the 3-year RTOR risk. As almost half of re-tears in our sample occurred before clearance to return to full activities, we suspect that the high rate of complication is largely attributable to pediatric patients’ high activity levels and difficulties adhering...
Publication date: Available online 7 October 2019Source: Journal of Clinical Orthopaedics and TraumaAuthor(s): David Ferguson, Rory Cuthbert, Saket TibrewalAbstractThe anterolateral soft tissue envelope of the knee has long been recognised as a key stabilising structure. Once the mainstay of operative management of anterior cruciate ligament (ACL) rupture, interest in the area fell away with the advent of intraarticular arthroscopic reconstruction. Renewed interest in these structures together with cadaveric data evidencing the potential for restoration of near normal knee biomechanics following ACL and anterolateral soft ...
CONCLUSIONS: ACLR became more symmetric, which may be from adaptations of the reconstructed limb after exercise. Changes in performance and symmetry may provide additional information regarding adaptations to exercise after reconstruction. PMID: 31593925 [PubMed - as supplied by publisher]