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Unilateral Lumbo-Pelvic Fixation for Denis Type I Unilateral Sacral Fracture: A Finite Element Analysis.
JOR Spine
March 2025
Department of Trauma Surgery, Orthopaedics and Plastic Surgery University Medical Center Göttingen Göttingen Germany.
Background: Unilateral sacral fractures with posterior ring instability represent a prevalent type of posterior pelvic ring fracture. While lumbo-pelvic fixation is recognized as a highly stable method, the sufficiency of unilateral lumbo-pelvic fixation (ULF) for such fractures remains under debate.
Purpose: This study aims to assess the biomechanical stability of ULF compared to traditional bilateral lumbo-pelvic fixation (BLF) and triangular osteosynthesis (TO), incorporating clinical observations, and previous biomechanical data.
Hydrogen-bonded macrocycle-mediated dimerization for orthogonal supramolecular polymerization.
Beilstein J Org Chem
January 2025
College of Chemistry, Sichuan University, Chengdu 610064, China.
Orthogonal self-assembly represents a useful methodology to construct supramolecular polymers with AA- and AB-type monomers, as commonly used for covalently linked polymers. So far, the design of such monomers has relied heavily on three-dimensional macrocycles, and the use of two-dimensional shape-persistent macrocycles for this purpose remains rather rare. Here, we demonstrate a dimerization motif based on a hydrogen-bonded macrocycle that can be effectively applied to form orthogonal supramolecular polymers.
View Article and Find Full Text PDFAccuracy and reliability of tibial torsion measurement using radiography and ultrasound in dogs.
Vet Med (Praha)
December 2024
Department of Veterinary Surgery, College of Veterinary Medicine, Jeonbuk National University, Jeollabuk-do, Republic of Korea.
Tibial torsion assessment is crucial for understanding deformities and malalignments that can lead to joint pathologies in dogs. Different methods such as radiography, computed tomography (CT), and three-dimensional (3D) volume-rendering techniques have been employed to measure tibial torsion. This study compared the accuracy and reliability of tibial torsion angle (TTa) measurements obtained using radiography and ultrasound tilting techniques against those obtained using the 3D volume-rendering method in small-to-medium-sized non-chondrodystrophic dogs.
View Article and Find Full Text PDFTwo-Dimensional Layered Germanium Iodide Perovskite Ferroelectric Semiconductors.
Angew Chem Int Ed Engl
January 2025
Chinese Academy of Sciences Fujian Institute of Research on the Structure of Matter, State Key Laboratory of Structure Chemistry, CHINA.
The discovery of ferroelectricity in two-dimensional (2D) semiconductors has opened a new and exciting chapter in next-generation electronics and spintronics due to their lattice-dimensionality-induced unique behaviors and fascinating functionalities brought by spontaneous polarization. The emerging layered halide perovskites with 2D lattices provide a great platform for generating reduced symmetry and low-dimensional ferroelectricity. Herein, inspired by the approach of reduced lattice dimensionality, a series of 2D layered germanium iodide perovskite ferroelectric semiconductors A2CsGe2I7 [where A = PA (propylammonium), BA (butylammonium) and AA (amylammonium)] was firstly developed, which demonstrates remarkable semiconducting features including narrow direct bandgap (~1.
View Article and Find Full Text PDFThree-dimensional sonographic findings of diprosopus: a case report and literature review.
BMC Pregnancy Childbirth
January 2025
Department of Obstetric and Gynecological Ultrasound, The Second Affiliated Hospital of Dalian Medical University, Dalian, China.
Background: Diprosopus is one of the rarest anomalies. It typically manifests as bilateral alterations and often involves anomalies within the cranial structures. In this report, we present a case of a fetus with diprosopus diagnosed prenatally.
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