DIRECT PEDICLE SCREW INSERTION PULLOUT STRENGTH [PDF]
Acta Ortopédica Brasileira, 2021 Objective: Study the in vitro pullout strength of SpineGuard/Zavation Dynamic Surgical Guidance Z-Direct Screw (DSG Screw), a screw pedicle designed to be inserted using a direct insertion technique.
RÔMULO PEDROZA PINHEIRO +5 more
doaj +8 more sources
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 +4 more sources
Can barb thread design improve the pullout strength of bone screws?: a biomechanical study and finite element explanation [PDF]
Bone & Joint Research, 2021 Aims: To draw a comparison of the pullout strengths of buttress thread, barb thread, and reverse buttress thread bone screws. Methods: Buttress thread, barb thread, and reverse buttress thread bone screws were inserted into synthetic cancellous bone ...
Xiaoreng Feng +5 more
doaj +4 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 +3 more sources
Pullout Strength of Pedicle Screws Inserted Using Three Different Techniques: A Biomechanical Study on Polyurethane Foam Block [PDF]
Bioengineering, 2023 Pullout strength is an important indicator of the performance and longevity of pedicle screws and can be heavily influenced by the screw design, the insertion technique and the quality of surrounding bone. The purpose of this study was to investigate the
Lien-Chen Wu +5 more
doaj +2 more sources
Mapping of the Inferior Glenohumeral Ligament for Suture Pullout Strength: A Biomechanical Analysis [PDF]
Orthopaedic Journal of Sports Medicine, 2021 Background: Suture pullout during rehabilitation may result in loss of tension in the inferior glenohumeral ligament (IGHL) and contribute to recurrent instability after capsular plication, performed with or without labral repair.
Sumit Raniga MSc, MBChB +5 more
doaj +2 more sources
Pullout strength of different pedicle screws after primary and revision insertion: an in vitro study on polyurethane foam [PDF]
BMC Musculoskeletal Disorders, 2023 Background Surgeons are routinely required to remove loose or failed pedicle screws and insert a new screw in their place. However, inserting a new screw into an existing hole may compromise the holding capacity of the pedicle screw.
Lien-Chen Wu +5 more
doaj +2 more sources
Insertional torque and pullout strength of reinserted screws for sacroiliac joint fusion: Effects of implant dimensions, bone density, and tapping [PDF]
North American Spine Society JournalBackground: Sacroiliac joint (SIJ) fusion is a common procedure for SIJ pain and dysfunction. Traditional threaded screws offer limited bony integration, prompting the development of additively manufactured, porous implants aimed at enhancing ...
Cale J. Hendricks, BS +6 more
doaj +2 more sources
The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength [PDF]
Revista Brasileira de Ortopedia, 2020 Objective Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws. Methods Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.5 and 6.5 mm, were inserted in polyurethane ...
Rodrigo Barra Caiado Fleury +5 more
doaj +5 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