Results 231 to 240 of about 114,321,802 (286)

Novel Utilization of a Preangulated, Osseointegrated Implant in a Case of Metacarpophalangeal Amputation: Design, Technique, and Rehabilitation Protocols Plus Functional Outcomes. [PDF]

J Hand Surg Glob Online
Liddy N, Hamilton-Hall MN, Strike SA, Etheridge A, Filippi P, Green WA, Lindsey BA.   +6 more
europepmc   +1 more source

Enhancing Predictive Accuracy in Finite Element Analysis of Cement Augmentation: Methodological Considerations - A Commentary on "Biomechanical Impact of Cement Augmentation on Pedicle Screw Fixation and Adjacent Segment Disease in Multilevel Lumbar Fusion: A Finite Element Analysis". [PDF]

Neurospine
Mo F, He S.
europepmc   +1 more source

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A biomechanical investigation of the retentive force of pedicle screw structures for different screw tulip designs

Clinical Biomechanics, 2019
Pedicle screw based spinal fixation systems have been widely used for treating a variety of spinal diseases. The retentive force is an important factor that determines structural stability. The screw tulip design and the magnitude of nut tightening torque influence the retentive force.
Po-Liang Lai, Chun-Li Lin
exaly   +3 more sources

Force measurements in screw fixation

Journal of Biomechanics, 1976
Abstract An entire range of screw sizes and types from one manufacturer (Synthes, Switzerland) along with two experimental sizes were tested in bovine cancellous bone to measure torque of insertion, screwdriver pressure, axial compression generated by the screw, screw breaking strength and efficacy of various head types.
David M. Nunamaker, Stephan M. Perren
openaire   +2 more sources

Effects of Screw Configuration on the Preload Force of Implant-Abutment Screws

The International Journal of Oral & Maxillofacial Implants, 2018
The aim of this study was to investigate the effects of tightening torque, screw head angle, and thread number on the preload force of abutment screws.The test specimens consisted of three self-manufactured components (ie, a thread sleeve serving as an implant analog, an abutment analog, and an abutment screw).
Holger, Zipprich, Florian, Rathe, Sören, Pinz, Luca, Schlotmann, Hans-Christoph, Lauer, Christoph, Ratka   +5 more
openaire   +2 more sources

Optimizing Bone Screw Pullout Force

Journal of Orthopaedic Trauma, 1990
Stability of internal fixation by plate and screw depends on the interface of bone and screw threads. Bone-screw thread design was tested in a synthetic bone model to determine maximum bone-screw pullout force. The model was confirmed to provide reproducible results in a clinically relevant range.
T A, DeCoster, D B, Heetderks, D J, Downey, J S, Ferries, W, Jones   +4 more
openaire   +2 more sources

Industrielle kraftgeregelte Schraubprozesse/Industrial force-controlled screw fastening – Robot-based industrial screw fastening with force control

wt Werkstattstechnik online, 2022
Manuelle Schraubmontagen profitieren von menschlichen feinmotorischen Fähigkeiten für die flexible Positionierung der Werkzeuge und Bauteile. Solche Prozesse lassen sich mithilfe eines kooperativen Robotersystems automatisieren, welches flexibel in einer dynamischen Umgebung agiert und insbesondere die Fähigkeit mitbringt, hohe Prozesskräfte ...
Arturo Bastidas-Cruz, Tanureza Jaya, Kevin Haninger, Jörg Krüger   +3 more
openaire   +1 more source

Compressive Force With 2-Screw and 3-Screw Subtalar Joint Arthrodesis With Headless Compression Screws

Foot & Ankle International, 2016
Background: Joint compression is an essential element of successful arthrodesis. Although subtalar joint compression generated by conventional screws has been quantified in the laboratory, compression obtainable with headless screws that rely on variable thread pitch to achieve bony contact has not been assessed.
Takumi, Matsumoto, Richard R, Glisson, Markus, Reidl, Mark E, Easley   +3 more
openaire   +2 more sources

Biomechanical Comparison of Endplate Forces Generated by Uniaxial Screws and Monoaxial Pedicle Screws

Orthopedics, 2012
Current surgical treatment of idiopathic scoliosis involves the use of various segmental instrumentation. Various pedicle screws have allowed for improved correction. Although monoaxial screws have improved rotational control compared with polyaxial screws, their use may increase screw–bone interface or vertebral endplate forces if not inserted in an ...
David A, Essig, Christopher P, Miller, Ming, Xiao, Paul, Ivancic, Kola, Jegede, Raghav, Badrinath, Brian G, Smith, Jonathan N, Grauer   +7 more
openaire   +2 more sources