The articular amplitudes (abduction of the thumb, flexion/extension of the digital joints), arthritic localizations and the mineralization of the bones of the hand were studied in 155 subjects of both genders and classified by decades from 20 to 90 or more years old. There was a significant decrease in articular amplitudes with age and a considerable increase of arthritis especially after 70 years. Arthritic changes were seen most frequently in the distal interphalangeal joints, then with an equal prevalence, arthritis was encountered in the metacarpophalangeal and in the proximal interphalangeal joints. Articular chondrocalcinosis had a prevalence of 15 p. cent in subjects over 60 years and was always associated with arthritic changes in subjects over 80. The cortical index of the second metacarpal bone, which was chosen to express osteopenia, diminishes significantly with age only in female subjects.
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Acta Bioeng Biomech
September 2024
Xinjiang University, China.
: The purpose of this study was to investigate dynamic responses of Lenke1B+ spines of adolescent scoliosis patients to different frequencies. : Modal analysis, harmonic response analysis and transient dynamics of a full spine model inverted by the finite element method using Abaqus. : The first-order axial resonance frequency of 4.
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School of Materials Science and Engineering, Tianjin University, Tianjin 300354, China.
Ultrasonic welding (USW) is considered one of the most suitable methods to join semi-crystalline carbon fiber-reinforced thermoplastics (CFRTPs). The degree of crystallinity (DoC) of the semi-crystalline resin will affect the ultrasonic welding process by affecting the mechanical properties of the base material. In addition, ultrasonic welding parameters will affect the joint performance by affecting the DoC of the welded material at the welding interface.
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Department of Engineering and Architecture, University of Trieste, Via Valerio 10, 34127 Trieste, Italy.
Swimmer's shoulder is a common condition among elite swimmers, often leading to pain and reduced performance. Fatigue can exacerbate this condition by affecting shoulder strength, proprioception, and range of motion, potentially increasing the risk of overuse injuries. This preliminary study aimed to evaluate the impact of physiotherapy treatment and the effects of fatigue on shoulder kinematics using inertial and magnetic measurement units (IMUs).
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December 2024
Faculty of Materials Engineering and Physics, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.
Thermoplastic composites have garnered significant attention in various industries due to their exceptional properties, such as recyclability and ease of molding. In particular, biocomposites, which combine biopolymers with natural fibers, represent a promising alternative to petroleum-based materials, offering biodegradability and reduced environmental impact. However, there is limited knowledge regarding the efficacy of joining PLA/PHBV-based biocomposites modified with nanocrystalline cellulose (NCC) using vibration welding, which restricts their potential applications.
View Article and Find Full Text PDFPhysiother Res Int
January 2025
Department of Biomedical Engineering, University of Engineering and Technology (UET) Lahore, Narowal Campus, Narowal, Pakistan.
Background And Purpose: Throwing a baseball involves intense exposure of the arm to high speeds and powerful forces, which contributes to an increasing prevalence of arm injuries among athletes. Traditional rigid exoskeletons and rehabilitation equipment frequently lack portability, safety, ergonomic design, and affordability. Traditional rehabilitation approaches frequently require therapist monitoring, resulting in therapy delays.
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