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Dorsoradial ligament reconstruction versus imbrication for restoring trapeziometacarpal joint stability: a comparative biomechanical study.
Sci Rep
December 2024
Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, South Korea.
The unique saddle articulation of the trapeziometacarpal joint allows for a wide range of motion necessary for routine function of the thumb. Inherently unstable characteristics of the joint can lead painful instability. In this study, we modified a surgical dorsal ligament reconstruction technique for restoring trapeziometacarpal joint stability.
View Article and Find Full Text PDFUniform dipole resonance and suppressed quadrupole resonance for constant transmittivity full phase control plasmonic metasurfaces.
Sci Rep
December 2024
Department of Electrical Engineering, Centre for NEMS and Nanophotonics (CNNP), Indian Institute of Technology Madras, Chennai, 600036, India.
Transmission-type plasmonic phase metasurfaces utilizing the Pancharatnam-Berry (PB) phase require constant transmittivity with complete phase variation from 0 to 2π. Usually, this is achieved by rotating metallic nanoparticles in an otherwise uniform lattice arrangement. However, this rotation and the chosen lattice structure cause a significant change in the transmittivity, resulting in a lower intensity of light with certain phases and a higher intensity for other phases.
View Article and Find Full Text PDFOptimization of tensile strength of AlSi10Mg material in the powder bed fusion process using the Taguchi method.
Sci Rep
December 2024
Vocational School of Technical Sciences, Akdeniz University, Antalya, Turkey.
This study examined scan speed, hatch distance, and scan rotation angle parameters to determine the effects of the powder bed fusion process on the tensile strength of AlSi10Mg material. The Taguchi L9 experimental design was applied to evaluate the effects of the parameters systematically. The experimental results revealed the importance of the parameters affecting the tensile strength of the AlSi10Mg material.
View Article and Find Full Text PDFMetformin inhibits muscle atrophy through the PI3K/AKT/mTOR pathway in a rat model of acute rotator cuff tears.
J Shoulder Elbow Surg
December 2024
Department of Orthopaedic Surgery, Konkuk University Medical Center, Seoul, Korea.
Background: Muscle atrophy after the rupture of a rotator cuff (RC) tendon is a major factor that increases the risk of secondary complications and re-rupture. Metformin, a type 2 diabetes treatment, can be used to modulate intracellular signaling pathways that promote muscle growth. This study aimed to verify whether systemic metformin administration could prevent supraspinatus (SS) atrophy after RC rupture in a rat model.
View Article and Find Full Text PDFRe-tear rate between 1 and 2 years postoperatively after arthroscopic rotator cuff repair is over 30% and associated with higher tear size and fatty degeneration.
Arthroscopy
December 2024
Department of Orthopaedic Surgery, Chiba University after Graduate School of Medicine.
Purpose: The purpose of this study was to evaluate the integrity of the repaired rotator cuff between 1 and 2 years postoperatively after arthroscopic rotator cuff repair (ARCR) using magnetic resonance imaging (MRI), investigate the factors affecting its change, and assess the association between the change and postoperative clinical outcomes.
Methods: Rotator cuff tear patients who underwent ARCR and were evaluated by MRI before surgery, and 1 and 2 years after ARCR with a minimum of 2-year follow-up were included in this study. Repair integrity was evaluated using Sugaya's classification, and according to the classification types IV and V were defined as re-tears.
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