Results 321 to 330 of about 1,942,127 (402)

Cancellous Screws Are Biomechanically Superior to Cortical Screws in Metaphyseal Bone

Orthopedics, 2016
Cancellous screws are designed to optimize fixation in metaphyseal bone environments; however, certain clinical situations may require the substitution of cortical screws for use in cancellous bone, such as anatomic constraints, fragment size, or available instrumentation.
Tim, Wang, Christopher, Boone, Anthony W, Behn, Justin B, Ledesma, Julius A, Bishop   +4 more
openaire   +3 more sources

Extraction Strength of Cannulated Cancellous Bone Screws

Journal of Orthopaedic Trauma, 1993
The purpose of this study was to determine whether the alterations in the relative dimensions of thread and core diameter that accompany cannulation of cancellous bone screws affect their holding strength. The screws were inserted in bovine femoral cancellous bone and mounted in the load train of a materials testing system.
T C, Hearn, J, Schatzker, N, Wolfson
openaire   +3 more sources

Orthodontic bone screws: A quick update and its promising future.

Orthodontics & craniofacial research, 2020
Orthodontic bone screws (OBSs) provide intraoral anchorage by penetrating oral mucosa and seating firmly in basilar bone (BB). Retromolar (prosthetic-type) implants introduced the extra-alveolar (E-A) concept for BB anchorage to move teeth throughout the
Chris H. Chang, Lexie Y Lin, W. Roberts
semanticscholar   +1 more source

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

Comments on bone screws

Techniques in Orthopaedics, 1991
Metal bone screws are a fundamental element of fracture fixation. Screws are described by their thread diameter, thickness of the root of the screw, and pitch. Bone screws are inserted by first making a pilot hole. When screws are used to coapt or lag bone, then a channel has to be drilled the same diameter as the threads. Cannulation of a screw allows
Jeff Mason, Jeff Jones, David Seligson, Stephen Henry   +3 more
openaire   +1 more source

Biomechanical properties of small bone screws

Journal of Oral and Maxillofacial Surgery, 1994
To evaluate systematically the biomechanical properties of 13 popular screw designs, ranging from 0.8 to 2.0 mm in diameter.Screws were characterized in terms of external, core, and drill diameter; cutting flute and head design; material; pitch, thread depth; and height of shank (unthreaded portion) and shank with plate.
Z H, You, W H, Bell, E D, Schneiderman, R B, Ashman   +3 more
openaire   +2 more sources

Biomechanical comparison of bone-screw–fasteners versus traditional locked screws in plating female geriatric bone

Injury, 2020
To biomechanically compare plated constructs using nonlocking bone-screw-fasteners with interlocking threads versus locking screws with traditional buttress threads in geriatric female bone.Eleven matched pairs of proximal and distal segments of geriatric female cadaveric tibias were used to create a diaphyseal fracture model.
Malcolm R. DeBaun, Steven T. Swinford, Michael J. Chen, Timothy Thio, Anthony A. Behn, Justin F. Lucas, Julius A. Bishop, Michael J. Gardner   +7 more
openaire   +2 more sources

Remodeling along the Bone-screw Interface

Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie, 2008
The stability of cortical miniscrews depends on the contact between bone and implant. The aim of this study was to compare bone remodeling along the contact surface between the screw and bone with and without pre-drilling.Twenty-four FAMI miniscrews (length 10 mm, diameter 2 mm) were inserted into the mandibular alveolar process apical to the premolars
Thomas Michael, Präger, Robert, Mischkowski, Nico, Laube, Paul-Georg, Jost-Brinkmann, Ralf, Müller-Hartwich   +4 more
openaire   +2 more sources