Results 111 to 120 of about 55,903 (167)

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

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

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

Cortical Bone Screw Fixation

2017
Placement of lumbar fixation screws using the cortical bone trajectory is a novel and potentially valuable technique. In this chapter, we discuss the current literature on clinical outcomes and biomechanical properties of the cortical bone trajectory. We examine indications for which this trajectory may be beneficial compared to a traditional pedicle ...
Mark Benjamin Frenkel, J. J. Renfrow, Charles L. Branch   +2 more
openaire   +1 more source

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

Alendronate Inhibits Bone Resorption at the Bone-screw Interface

Clinical Orthopaedics & Related Research, 2005
In the current study, we investigated whether the systemic administration of alendronate, a third-generation bisphosphonate, suppressed the loosening of screws at the bone-screw interface. We systemically administered alendronate to rats fitted with external fixators.
Takahiro, Miyaji, Takanobu, Nakase, Yoshiaki, Azuma, Nobuyuki, Shimizu, Yasuo, Uchiyama, Hideki, Yoshikawa   +5 more
openaire   +2 more sources

Bone screw design: analytical formulation

Proceedings of 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2002
Presents a formula for reliably predicting holding power of bone screws, something which has not previously been reported. This formulation is of value to the orthopaedic clinician in general and osteosynthesis research in particular. In this study, based on the experimental data and some biomechanical considerations, the authors proposed an analytical
K. Firoozbakhsh, T.A. DeCoster, M.S. Moneim   +2 more
openaire   +1 more source

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   +2 more sources