Results 331 to 340 of about 1,942,127 (402)

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

Additive manufacturing-based design approaches and challenges for orthopaedic bone screws: a state-of-the-art review

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2022
Rajet Agarwal, Vishal Gupta, Jaskaran Singh   +2 more
semanticscholar   +1 more source

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

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

Bone Allograft Pedicle Screw Augmentation

Clinical Spine Surgery
Study Design: We performed a comprehensive cadaveric biomechanical study to compare the fixation strength of primary screws, screws augmented with bone allograft, and screws augmented with polymethylmethacrylate cement. Objective: To evaluate a novel technique for screw augmentation
Lauren, B., Paul, K., Lorne, B., Rizkallah, M., Steffen, T., Loon, J.V., Aoude, A., Ouellet, J., Kroeze, R.J., Spruit, M.   +9 more
openaire   +3 more sources

Cortical bone failure mechanisms during screw pullout

Journal of Biomechanics, 2012
An experimental and computational study of screw pullout from cortical bone has been conducted. A novel modification of standard pullout tests providing real time image capture of damage mechanisms during screw pullout was developed. Pullout forces, measured using the novel test rig, have been validated against standard pullout tests.
Emer M, Feerick, J Patrick, McGarry
openaire   +2 more sources