Journal of orthopaedic surgery (Hong Kong)
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J Orthop Surg (Hong Kong) · Aug 2014
Insertional torque and pullout strength of pedicle screws with or without repositioning: a porcine study.
PURPOSE. To evaluate the insertion torque and pullout strength of pedicle screws with or without repositioning. METHODS. 20 fresh porcine lumbar vertebrae of similar size were used. ⋯ CONCLUSION. Repositioning pedicle screws should be avoided, especially when the pedicle wall is breached. If repositioning is deemed necessary, augmentation with polymethyl methacrylate or a screw with a larger diameter should be considered.
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J Orthop Surg (Hong Kong) · Apr 2014
Comparative StudyPolyaxial versus uniaxial volar locking plate for distal radial fractures.
To compare the penetration of the distal screws in relation to the thickness of the distal metaphysis in the polyaxial versus uniaxial volar locking plates. ⋯ The polyaxial volar locking plate system enabled deeper insertion of distal screws into the subchondral bone, and thus providing better buttress for the fracture fragments.
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To evaluate outcome in 20 patients treated for periprosthetic fractures after total knee arthroplasty (TKA). ⋯ The locked compression plate is effective in managing periprosthetic femoral fractures. Periprosthetic patellar and tibial fractures are uncommon. The latter often warrant revision arthroplasty owing to the loose implant.