Results 81 to 90 of about 1,892,246 (283)

The Effect of “Toggling” on the Pullout Strength of Bone Screws inNormal and Osteoporotic Bone Models

, 2013
This study tests the hypothesis that screw toggling will reduce the pullout strength of bone screws. Pullout strength of cortical (cylindrical) and cancellous (tapered by 4°) bone screws were measured without and after toggling (movement caused by a ...
P. S. Patel, D. Hukins, D. Shepherd
semanticscholar   +1 more source

A novel model of locking plate and locking spongious screw: a biomechanical in vitro comparison study with classical locking plate

Journal of Orthopaedic Surgery and Research
Background Locking plates are commonly used for the fixation of comminuted, periprosthetic and osteoporotic bone fractures. These plates are secured to the bone with screws, creating a stable connection with fixed angle between the plate and the screws ...
Fatih Parmaksizoglu, Sinan Kilic, Onur Cetin   +2 more
doaj   +1 more source

Cortical bone trajectory fixation cause low compression force in anterior vertebral column

North American Spine Society Journal, 2022
Background: The cortical bone trajectory (CBT) screws follow a caudocephalad and lateral path from the pedicle to the vertebral body. The bone fusion rate of CBT fixation is equal to or lower than conventional pedicle screw fixation.
Sho Fujiwara, Yuichiro Ohnishi, Koichi Iwatsuki, Haruhiko Kishima   +3 more
doaj  

Opposing Flanks vs Parallel Flanks – the Influence of Headless Screw Design on Compression and Pull- Out Resistance

Foot & Ankle Orthopaedics, 2023
Category: Basic Sciences/Biologics; Basic Sciences/Biologics Introduction/Purpose: Screws generate and maintain compression against distracting forces when performing osteotomy or fusion surgery.
Rachel Tan, Alba Morillo Patterson, Stephen JG Taylor PhD, Shelain Patel FRCS(Orth), Alessio Bernasconi MD, PhD, FEBOT, Karan Malhotra MBChB (Hons), MRCS, FRCS (Tr&Orth)   +5 more
doaj   +1 more source

The optimal angle of screw for using cement-screw technique to repair tibial defect in total knee arthroplasty: a finite element analysis

Journal of Orthopaedic Surgery and Research, 2022
Background The cement-screw technique is a convenient method to repair tibial plateau defects in primary and revision total knee arthroplasty (TKA). However, the optimal angle of screw insertions is unknown.
Guanghui Zhao, Shuxin Yao, Jianbing Ma, Jianpeng Wang   +3 more
doaj   +1 more source

Spinal stabilization for patients with metastatic lesions of the spine using a titanium spacer [PDF]

, 1992
Anterior decompression in spinal metastases of the corporal type with impending (n=5) or present (n=36) neurological complications was performed in 41 patients.
Hertlein, H., Kauschke, T., Lob, G., Mittlmeier, T., Piltz, Stefan, Schürmann, M.   +5 more
core   +1 more source

Biomechanical evaluation of bone screw fixation with a novel bone cement

BioMedical Engineering OnLine, 2015
Bone cement augmentation is commonly used to improve the fixation stability of orthopaedic implants in osteoporotic bone. The aim of this study was to evaluate the effect of novel bone cements on the stability of bone screw fixation by biomechanical testing and to compare them with a conventional Simplex(®)P bone cement and requirements of the ...
Juvonen, Tiina, Nuutinen, Juha-Pekka, Koistinen, Arto P, Kröger, Heikki, Lappalainen, Reijo   +4 more
openaire   +5 more sources

Novel placement of cortical bone trajectory screws in previously instrumented pedicles for adjacent-segment lumbar disease using CT image-guided navigation.

Neurosurgical Focus, 2014
OBJECT Symptomatic adjacent-segment lumbar disease (ASLD) after lumbar fusion often requires subsequent surgical intervention. The authors report utilizing cortical bone trajectory (CBT) pedicle screw fixation with intraoperative CT (O-arm) image-guided ...
Analiz Rodriguez, M. Neal, Ann Liu, A. Somasundaram, Wesley Hsu, C. Branch   +5 more
semanticscholar   +1 more source

Dynamic Torque Limitation vs Static Torque Limitation for Bone Screws in Pig Bone

Current Directions in Biomedical Engineering
Correctly torquing bone screws is important to achieve good patient outcomes. An automated system has been previously proposed that may allow more objective torquing of bone screws. Here the system is tested vs. a static torque limit in pig bone.
Wilkie Jack, Richard Jordan, Joshi Aditya, McFarlane Zoe, Staiger Mark, Rauter Georg, Möller Knut   +6 more
doaj   +1 more source

An Elastic Analysis of a Plated Bone to Determine Fracture Gap Motion [PDF]

, 1985
An elastic analysis to determine fracture gap motions occurring in the osteotomized and plated canine femur was performed using the finite element program NASTRAN.
Cooke, F. W., Vannah, W. M.
core   +1 more source