The authors report minimum 25-year follow-up results of cheilectomy performed in five hips affected by Legg-Calve-Perthes disease (LCPD) with hinged abduction. All five hips had a poor prognosis in terms of age at disease onset, treatment delay, hinged abduction, subluxation, and extensive head involvement. Cheilectomy, partial capital resection, was made along the indentation groove on the articular surface of the femoral head. Only the extruded portion of the femoral head was excised. Patients were placed in balanced suspension traction before and after surgery. Cheilectomy results were satisfactory during the early postoperative period (2-3 years) in terms of pain, range of motion, and limping. However, long-term results with a minimum follow-up of 25 years were unsatisfactory and showed poor hips in three, fair in one, and good in one. In addition, all five hips showed early evidence of osteoarthritic change (when patients were in their 30s). These results show that cheilectomy is not effective at preventing the early appearance of osteoarthritic change in LCPD hips with a deformed head and hinged abduction.
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PLoS One
December 2024
Lauflabor Locomotion Laboratory, Institute of Sport Science, Centre for Cognitive Science, Technische Universität Darmstadt, Hessen, Germany.
Maintaining balance during human walking hinges on the exquisite orchestration of whole-body angular momentum (WBAM). This study delves into the regulation of WBAM during gait by examining balance strategies in response to upper-body moment perturbations in the frontal plane. A portable Angular Momentum Perturbator (AMP) was utilized in this work, capable of generating perturbation torques on the upper body while minimizing the impact on the center of mass (CoM) excursions.
View Article and Find Full Text PDFAnat Rec (Hoboken)
December 2024
Biology Department, Northland Pioneer College, Holbrook, Arizona, USA.
Nothronychus graffami was a large therizinosaur represented by a single well-preserved individual from the Turonian Tropic Shale of southern Utah. It is characterized by an enlarged abdomen, small tail, and an extensively pneumatized axial skeleton, and is frequently regarded as herbivorous. Given the overall tail reduction and the development of a wide fused synsacrum with widely spaced acetabulae, it is reconstructed with an anteriorly rotated femur and a displaced resting ground reaction force anterior to the center of mass.
View Article and Find Full Text PDFNat Commun
December 2024
Department of Electrical, Computer, and Energy Engineering, University of Colorado Boulder, 1111 Engineering Dr, Boulder, CO, USA.
Modern biotechnology necessitates robust biosecurity protocols to address the risk of engineered biological threats. Current efforts focus on screening DNA and rejecting the synthesis of dangerous elements but face technical and logistical barriers. Screening should integrate into a broader strategy that addresses threats at multiple stages of development and deployment.
View Article and Find Full Text PDFAm J Primatol
January 2025
Department of Biology, Unit of Ethology, University of Pisa, Pisa, Italy.
Facial communication regulates many aspects of social life in human and nonhuman primates. Empirically identifying distinct facial expressions and their underlying functions can help illuminate the evolution of species' communicative complexity. We focused on bared-teeth faces (BTFs), a highly versatile facial expression in the tolerant macaque Macaca tonkeana.
View Article and Find Full Text PDFInt Orthop
December 2024
Department of Orthopaedic Surgery, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, India.
Purpose: Proximal humerus fractures account for 4-5% of all fractures in adults and affect females more than males. With the advent of special locking plates, the treatment trend has shifted more towards a surgical approach. These methods have produced good results but very high complications rates have been reported in the literature.
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