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A lightweight prosthetic hand with 19-DOF dexterity and human-level functions.
Nat Commun
January 2025
Institute of Humanoid Robots, School of Engineering Science, University of Science and Technology of China, Hefei, 230026, China.
A human hand has 23-degree-of-freedom (DOF) dexterity for managing activities of daily living (ADLs). Current prosthetic hands, primarily driven by motors or pneumatic actuators, fall short in replicating human-level functions, primarily due to limited DOF. Here, we develop a lightweight prosthetic hand that possesses biomimetic 19-DOF dexterity by integrating 38 shape-memory alloy (SMA) actuators to precisely control five fingers and the wrist.
View Article and Find Full Text PDFExpiratory Central Airway Collapse and Pneumatic Stenting With Continuous Positive Pressure Titration: A Technique Description.
Mayo Clin Proc
December 2024
Division of Pulmonary, Allergy, and Sleep Medicine, Mayo Clinic, Jacksonville, FL.
Objective: To provide a standardized step-by-step guide for continuous positive airway pressure (CPAP) titration during dynamic flexible bronchoscopy (DB).
Patients And Methods: This descriptive study included patients referred to Mayo Clinic for concern regarding expiratory central airway collapse (ECAC) who underwent DB with CPAP titration from April 5, 2023, to February 9, 2024. Demographic characteristics, comorbidities, pulmonary function test results, and procedural details such as anesthesia protocols, CPAP settings, outcomes of pneumatic stenting, complications, and severity of ECAC were recorded.
Establishment of 3D Cultures of Myometrium, Leiomyoma, and Leiomyosarcoma Cells: Advantages and Disadvantages of Two Different Models.
Reprod Sci
December 2024
Department of Experimental and Clinical Medicine, Faculty of Medicine, Università Politecnica Delle Marche, Via Tronto 10/a, 60020, Ancona, Italy.
Uterine leiomyomas are the most common benign, monoclonal, gynaecological tumors in a woman's uterus, while leiomyosarcoma is a rare but aggressive condition caused by the malignant transformation of the myometrium. To overcome the common obstacles related to the methods usually used to study these pathologies, we aimed to devise three-dimensional models of myometrium, uterine leiomyoma and leiomyosarcoma cell lines, using two different types of biocompatible scaffolds. Specifically, we exploited the agarose gel matrix in common 6-well plates and the alginate matrix using Bioprinting INKREDIBLE + (CELLINK), a pneumatic extruded base equipped with a system with double printheads, and a UV printer LED curing system.
View Article and Find Full Text PDFOsteochondral Regeneration With Anatomical Scaffold 3D-Printing-Design Considerations for Interface Integration.
J Biomed Mater Res A
January 2025
Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma, USA.
There is a clinical need for osteochondral scaffolds with complex geometries for restoring articulating joint surfaces. To address that need, 3D-printing has enabled scaffolds to be created with anatomically shaped geometries and interconnected internal architectures, going beyond simple plug-shaped scaffolds that are limited to small, cylindrical, focal defects. A key challenge for restoring articulating joint surfaces with 3D-printed constructs is the mechanical loading environment, particularly to withstand delamination or mechanical failure.
View Article and Find Full Text PDF[New intraoral digital impression with pneumatic gingival retraction used in the restoration of crown for posterior teeth: a case report].
Zhonghua Kou Qiang Yi Xue Za Zhi
October 2024
Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.
In fixed prosthodontics, clear exposure of the preparation margin is the prerequisite for obtaining accurate digital impressions and improving the marginal fit of restorations. To resolve the issues associated with the cord retraction technique, such as pain, acute injury, and prolonged procedural time, this study proposes a new technology for intraoral digital impression taking with pneumatic gingival retraction. The new scanning head blows a high-speed airflow that instantaneously separates the free gingiva, locally exposing the subgingival preparation margin.
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