Results 231 to 240 of about 1,046,684 (289)

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

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

Slippage Between Screwdriver and Bone Screw

Clinical Orthopaedics and Related Research, 2002
Cortical 3.5-mm stainless steel screws with hexagonal heads and corresponding screwdrivers from two manufacturers were investigated. Measurement of dimensions and torsional testing were done to study slippage between the screw and the driver bit. There were only small differences in dimensions between the manufacturers.
Jon K, Behring, Nils R, Gjerdet, Anders, Mølster   +2 more
openaire   +2 more sources

Fracture Fixation with Screws and Bone Plates

Veterinary Clinics of North America: Small Animal Practice, 1999
The treatment goal of fracture fixation is to restore the patient to normal function as quickly as possible. Fracture fixation can be accomplished by various means; fixation with screws and bone plates is not only a popular but a successful technique. In this article, the authors provide concepts that a surgeon must understand for successful screw and ...
M, Conzemius, S, Swainson
openaire   +2 more sources

An alternative to screws for plating osteoporotic bone

Journal of Biomedical Engineering, 1993
There are several problems with existing techniques used to plate broken bones. One of the most serious is that of screws pulling out during insertion or healing in patients suffering from osteoporosis. This paper investigates the mechanism of this pulling out, and proposes an alternative device to attach plates to weak bones.
T S, King, D, Cebon
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

Pedicle Screws and Bone Mineral Density

Spine, 1994
Thirty-five consecutive patients who underwent surgeries for decompression, and one-level fusions with Cotrel-Dubousset pedicle screws for spinal canal stenosis were included in this study. The relationship between bone mineral density of the lumbar spine and the rate of successful fusion and screw problems was studied.Bone mineral density of the third
K, Kumano, S, Hirabayashi, Y, Ogawa, Y, Aota   +3 more
openaire   +2 more sources

Strength comparison of allogenic bone screws, bioabsorbable screws, and stainless steel screw fixation

The Journal of Foot and Ankle Surgery, 2002
Allogenic bone screws are new to the fixation market and have yet to be tested against current fixation materials. An in vitro comparison of the same sizes of stainless steel, bioabsorbable, and allogenic bone screws was undertaken to assess screw resistance to the forces of bending, pullout, and shear.
James A, Rano, Ruth T, Savoy-Moore, Lawrence M, Fallat   +2 more
openaire   +2 more sources

Bone screws and plates in orthognathic surgery

International Journal of Oral Surgery, 1982
The almost universal use of bone plates and screws in orthognathic surgical procedures is surveyed. Based upon considerable personal experience, it is advocated that this technique should be used for better stabilization of the fragments, leading to faster bone healing and therefore to less relapse.
openaire   +2 more sources

fatigue behavior and osseointegration of the auxetic porous bone screw

Acta Biomaterialia, 2023
Scott J Hollister, Yubo Fan, Lizhen Wang
exaly