Publications by authors named "Yuko Nagaya"
Background: An unstable trochanteric femoral fracture is a serious injury, with a 1-year mortality rate of 5.4% to 24.9%, for which there is currently no standard treatment method.
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- Hydroxyapatite (HA) augmentation is evaluated for its effectiveness in treating trochanteric femoral fractures, involving a study of 85 patients, with 45 receiving HA and 40 not receiving it.
- The study measured various factors including insertion torque of lag screws, bone mineral density, and screw telescoping after surgery, with results showing that the HA group had better outcomes than the non-HA group regarding stability and screw movement.
- All fractures in the study healed without complications, suggesting that HA augmentation improves resistance to instability and can enhance treatment for trochanteric femoral fractures.
Background: Forged unsintered hydroxyapatite and poly l-lactic acid F-u-HA/PLLA) screw is bioactivite, bioabsorbable, and radiopaque with high mechanical strength. Its efficacy has been previously demonstrated in the treatment of lateral humeral condylar, lateral tibial condylar, ankle, and patellar fractures. However, studies on its efficacy in treatment of calcaneal fractures is lacking.
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- The study assesses the effectiveness of Microsoft Kinect V2 as a tool for analyzing human gait by comparing its data with a traditional motion capture system.
- Ten healthy volunteers participated in gait trials, with various parameters like gait velocity and joint angles being analyzed for reliability.
- Results showed strong reliability for gait velocity and step length, while other parameters had varying degrees of reliability, indicating Kinect's potential for evaluating certain aspects of walking.
Article Synopsis
- - The study analyzed data from the ORIGAMI trial to determine if adding methotrexate (MTX) affects the outcomes of abatacept treatment in patients with rheumatoid arthritis who hadn't used biologics before.
- - A total of 325 patients were split into two groups: those who received abatacept alone (MTX-) and those who received it with MTX (MTX+), and various health indicators were assessed over 52 weeks.
- - Results showed no significant differences in disease activity or retention rates of abatacept between the two groups after a year, suggesting that using MTX alongside abatacept might not provide extra benefits.
Concomitant anterior cruciate ligament (ACL) and anterolateral ligament (ALL) reconstruction has been reported as an effective technique for providing rotational control of the knee. However, the intraoperative risk of collision with an ACL tunnel during the drilling for the femoral ALL tunnel has been described. The purpose of this study was to investigate the various femoral drilling procedures to avoid tunnel collisions during combined double-bundle ACL and ALL reconstruction.
View Article and Find Full Text PDFBackground: Meniscal ramp lesion (RL) is the peripheral lesion of the posterior horn of the medial meniscus (PHMM) associated with anterior cruciate ligament (ACL) tear. The purpose of this study was to evaluate the accuracy of pre-operative magnetic resonance imaging (MRI) evaluation in diagnosing RL and to identify whether the difficulty in diagnosis differs depending on the location of RL.
Methods: ACL-injured patients undergoing ACL reconstruction from January 2017 to January 2019 were enrolled.
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- The study investigates the impact of adding anterolateral ligament (ALL) reconstruction to standard ACL surgery for patients with severe pivot shift injuries, aiming to enhance knee stability post-surgery.
- Eighteen patients with high-grade pivot shifts underwent the combined procedure, and several quantitative measurements were taken to assess knee movement and stability before and after surgery.
- Results showed that while both ACL reconstruction (ACLR) and ACLR combined with ALL reconstruction (ACLR + ALLR) improved stability, adding ALLR specifically reduced certain movement metrics related to stability, indicating potential benefits of the additional procedure in managing high-risk cases.
Background: The pivot-shift test is an important indicator of functional outcomes after anterior cruciate ligament (ACL) reconstruction (ACLR). Preoperative instability as indicated by the pivot-shift test is associated with residual instability after ACLR. Few studies have used quantitative means to evaluate the pivot shift after ACLR.
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- The study aimed to assess the role of the anterolateral structures (ALS) of the knee in maintaining rotational stability, specifically examining the impact of anterolateral ligament (ALL) reconstruction when paired with anterior cruciate ligament (ACL) reconstruction.
- Six fresh-frozen knees were analyzed through various conditions, including ACL deficiency and subsequent reconstructions, with knee stability evaluated using the pivot shift test (PST) and measured by an inertial sensor.
- The findings showed that while ACL reconstruction alone restored stability, combining it with ALL reconstruction significantly improved rotational stability to levels similar to an intact knee, suggesting that ALS plays a crucial role in stabilizing the knee during movement.
Article Synopsis
- The study aimed to evaluate the accuracy of cutaneous sensors compared to transosseous sensors for measuring rotational knee instability during the pivot shift test using cadaveric knees.
- Eight cadaveric knees were tested for both intact and ACL-deficient conditions, measuring acceleration and angular velocity with sensors attached to the tibia.
- Results showed that while cutaneous sensors correlated well with transosseous sensors, they had significantly lower measurements for overall acceleration and maximum internal rotation, suggesting these sensors may have limitations in clinical settings.
Purpose: This study investigated the direct and continuous attachment of the labrum to the glenoid fossa, including the fibrocartilaginous tissue, using image-analysis software and histology.
Methods: Twenty-six cadaveric shoulders (11 male, 15 female; mean age 80.1 years; age range 36-103 years) were used.
Background: Here we investigated the angle and placement of bone holes for suture anchors using postoperative computed-tomography scapula scans.
Methods: The study group comprised 20 shoulders from 20 consecutive patients (13 males and seven females; mean age 23.4 years) who underwent arthroscopic Bankart repair.