Objective: To study the in vivo stability of normal and anterior cruciate ligament (ACL)-injured knee joint before and after epidural anesthesia under 134 N pre-loading and evaluate the influence of muscular tension on the knee stability.
Methods: Eight volunteers with unilateral ACL rupture and normal contralateral knee were enrolled in this study. CT (3D) images and 2 orthogonal images of the knee were captured at 0°, 30°, 60°, and 90° under 134 N pre-loading. The orthogonal images were used to recreate the in vivo knee positions at each of the targeted flexion angles by 2D/3D registration to analyze the tibial translation data.
Results: The anterior tibia translation of both the intact and ACL-injured knees after anesthesia was significantly different from that before anesthesia at all the angles (P<0.05). The anterior tibial translation of the intact knee after anesthesia increased by 1.7 mm at 0°, 2.7 mm at 30°, 2.6 mm at 60°, and 2.3 mm at 90°, as compare to the increase of ACL-injured knee by 4.2 mm, 2.6 mm, 1.2 mm, and 1.6 mm, respectively.
Conclusion: The muscular tension has evident influence on the knee stability in static loading.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Comparing patient outcomes following outpatient total joint arthroplasty in a hospital setting versus an ambulatory surgery center.
J Orthop
July 2025
University of Louisville, Department of Orthopaedic Surgery, United States.
Background: Traditionally, total joint arthroplasty has been performed as an inpatient procedure, sometimes requiring a hospital stay of a few days. However, outpatient total joints have gained popularity in recent years. The purpose of this study is to compare patient outcomes following an outpatient total knee arthroplasty (TKA) or a total hip arthroplasty (THA) in a hospital setting versus an ambulatory surgical center.
View Article and Find Full Text PDFTranexamic acid use in rotator cuff repair: A systematic review of perioperative outcomes.
J Orthop
July 2025
Department of Orthopaedic Surgery, St. Luke's University Health Network, Bethlehem, PA, USA.
Background: Tranexamic acid (TXA) use has become the gold standard in total joint arthroplasty to limit intraoperative blood loss and transfusion rates. More recently, the indications for TXA have expanded to knee and shoulder arthroscopy with promising early results. However, the effectiveness of TXA during arthroscopic rotator cuff repair (RCR) is unclear.
View Article and Find Full Text PDFDynamic Changes in Muscle Thickness and Infrapatellar Fat Pad During Quadriceps Setting: An Ultrasound Echo Analysis.
Cureus
December 2024
Department of Health Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, JPN.
Purpose The infrapatellar fat pad (IFP) has the lowest pain threshold among all knee joint components and causes anterior knee pain after knee arthroplasty. It has been reported that selective muscle atrophy of the vastus medialis (VM) and fibrosis of the IFP may develop following knee joint surgery. Ultrasound enables visualization of IFP deformation (A1) from within the joint to the proximal area in response to muscle contraction, and this may be helpful in developing preventive and therapeutic strategies for IFP fibrosis.
View Article and Find Full Text PDFRelationship Between Quadriceps Strength at 6 Months Postoperatively and Improvement in Patient-Reported Knee Function After Anterior Cruciate Ligament Reconstruction.
Orthop J Sports Med
January 2025
Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
Background: Understanding the factors associated with poor recovery over time after anterior cruciate ligament reconstruction (ACLR) helps clinicians identify patients who are at risk and targets for an intervention.
Purpose: To determine the factors associated with improvement in subjective knee function from 6 to 12 months after ACLR.
Study Design: Case-control study; Level of evidence, 3.
Combined use of cleft and truncated triangle signs helps improve the preoperative MRI diagnosis of lateral meniscus posterior root tears in patients with ACL injuries.
Knee Surg Sports Traumatol Arthrosc
January 2025
Department of Joint Surgery and Sports Medicine, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.
Purpose: This study aimed to investigate whether combining the analysis of different magnetic resonance imaging (MRI) signs enhances the diagnostic accuracy of lateral meniscus posterior root tears (LMPRTs) in patients with anterior cruciate ligament (ACL) injuries. We hypothesised that analysing the cleft, ghost and truncated triangle signs and lateral meniscus extrusion (LME) measurement together would improve the preoperative MRI-based diagnosis of LMPRTs.
Methods: This retrospective study used prospectively collected registry data from two academic centres, including patients undergoing primary or revision ACL reconstruction (ACLR) and LMPRT repair.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!