Abstract
To describe a novel construct for proximal interphalangeal (PIP) joint arthrodesis using headless cannulated screws as an intramedullary washer to augment 90/90 intraosseous wiring and compare the biomechanical properties of this construct with those of the 90/90 intraosseous wiring without headless screw augmentation. Biomechanical evaluation of augmented 90/90 intraosseous wiring with headless cannulated screws (group 1) or 90/90 intraosseous wiring without augmentation (group 2) for PIP joint arthrodesis was performed in 3 matched-pair cadaveric specimens (12digitsper group). Each group was loaded to 10 N in the sagittal and coronal planesand theresultant stiffness from the load-displacement curve was calculated. In extension, eachgroup then underwent load to permanent deformation and load to catastrophic failure. The augmented 90/90 intraosseous wiring with cannulated screws construct demonstrated significantly greater stiffness by 132%, 64%, 79%, and 75% in flexion, extension, ulnar, and radial displacement, respectively. During load to permanent deformation testing, a 42% greater force was required to create permanent deformation in group 1 compared than group 2. There was no significant difference between the 2 groups during load to catastrophic failure testing. Augmenting 90/90 intraosseous wiring for PIP joint arthrodesis with 2 headless cannulated screws in the sagittal plane that serve as intramedullary washers for the sagittal wire and posts for the coronal wire significantly increases stiffness in all directions as well as load to permanent deformation compared with 90/90 intraosseous wiring without cannulated screw augmentation. Augmentation of the 90/90 intraosseous wire construct with headless cannulated screws can be considered in patients at risk for wire cutout or implant failure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.