Testing Pullout Strength of Pedicle Screw Using Synthetic Bone Models: Is a Bilayer Foam Model a Better Representation of Vertebra? [PDF]
Asian Spine Journal, 2018 Study Design A biomechanical study. Purpose A new biomechanical model of the vertebra has been developed that accounts for the inhomogeneity of bone and the contribution of the pedicle toward the holding strength of a pedicle screw.
Vicky Varghese +2 more
doaj +2 more sources
Intraoperative lateral wall breach simulation in the cadaveric spine and the impact of thread designs of screws on pullout strength in the osteoporotic thoracic vertebrae: A biomechanical study in human cadavers [PDF]
Acta Orthopaedica et Traumatologica TurcicaObjective: This study aimed (1) to simulate pedicle screw pullout after intraoperative external wall perforation and (2) to assess restoration strength with different thread designs in the pedicle screw instrumentation for osteoporotic thoracic ...
Ozcan Kaya +5 more
doaj +2 more sources
The effect of the trabecular microstructure on the pullout strength of suture anchors [PDF]
Journal of Biomechanics, 2010 This study investigates how the microstructural properties of trabecular bone affect suture anchor performance. Seven fresh-frozen humeri were tested for pullout strength with a 5mm Arthrex Corkscrew in the greater tuberosity, lesser tuberosity, and humeral head. Micro-computed tomography analysis was performed in the three regions of interest directly
Robert Guldberg +2 more
exaly +3 more sources
Evaluating Pedicle-Screw Instrumentation Using Decision-Tree Analysis Based on Pullout Strength [PDF]
Asian Spine Journal, 2018 Study Design A biomechanical study of pedicle-screw pullout strength. Purpose To develop a decision tree based on pullout strength for evaluating pedicle-screw instrumentation.
Vicky Varghese +2 more
doaj +2 more sources
Anisotropic pullout behavior of bauxite slag-geogrid interfaces [PDF]
Scientific ReportsThis study investigated the anisotropic pullout behavior of dry bauxite slag-geogrid interfaces to address a critical knowledge gap in abandoned bauxite slag deposits reinforcement. Laboratory tests were conducted on coarse sand (slag of 2.5–4.75 mm) and
Ziyang Zhao +3 more
doaj +2 more sources
Modification of a Two-Part Cancellous Locking Screw: A Pilot Study on Increasing Resistance to Axial Pullout Strength [PDF]
BioengineeringBackground/Objectives: The pullout failure of conventional locking screws (LSs, screws with a locking mechanism) may occur in patients with osteoporosis, particularly when inserted near joints or across periarticular fractures (e.g., proximal humerus ...
Chia-Hao Hsu +7 more
doaj +2 more sources
No Difference in Pullout Strength Between a Bio-inductive Implant and a Semitendinosus Tendon Graft in a Biomechanical Study of Medial Patellofemoral Ligament Repair Augmentation [PDF]
Arthroscopy, Sports Medicine, and RehabilitationPurpose: To compare the pullout strength of a bio-inductive implant (BI) used to augment a medial patellofemoral ligament (MPFL) repair with the pullout strength of semitendinosus graft in a biomechanical cadaveric model.
Austin Wetzler, M.P.H. +5 more
doaj +2 more sources
A novel UHMWPE anchor for improving the pullout resistance of pedicle screws [PDF]
Frontiers in Bioengineering and BiotechnologyIntroductionThe ability to maintain bone purchase and resist pullout is considered a basic requirement for pedicle screws. However, poor bone density or oversized pilot holes can increase the risk of screw loosening and pullout.
Che-Kuang Lin +3 more
doaj +2 more sources
Comparison of the Pullout Strength of Different Pedicle Screw Designs and Augmentation Techniques in an Osteoporotic Bone Model [PDF]
Asian Spine Journal, 2018 Study DesignMechanical study.PurposeTo compare the pullout strength of different screw designs and augmentation techniques in an osteoporotic bone model.Overview of LiteratureAdequate bone screw pullout strength is a common problem among osteoporotic ...
Gorkem Kiyak +3 more
doaj +2 more sources
Bone Quality Positively Correlates With Biomechanical Strength of All-Suture Anchors Utilized in Biceps Tenodesis [PDF]
Orthopaedic Journal of Sports MedicineBackground: All-suture anchors (ASAs) are increasingly used in biceps tenodesis (BT), and their fixation strength may vary with cortical bone and surgical position.
Andrew D. Posner MD +6 more
doaj +2 more sources