초록 ▼

A threaded washer with a central bore for use with a bone screw is disclosed. The washer is threaded into a counterbore extending below the bone surface and into cancellous bone material. The external washer threads are tapered to provide improved purchase. The bone screw is inserted through the cen

A threaded washer with a central bore for use with a bone screw is disclosed. The washer is threaded into a counterbore extending below the bone surface and into cancellous bone material. The external washer threads are tapered to provide improved purchase. The bone screw is inserted through the central bore of the washer and threaded into the fragment beyond the fracture. The washer provides improved compressive forces while permitting the bone screw head to be located beneath the bone surface.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for the fixation of small bone fractures, comprising a washer with a central bore, said central bore having a diameter, and an external tapered thread for engaging an outer bone fragment, and a bone screw having a shaft with a thread with a major diameter les

[ What is claimed is:] [1.] An apparatus for the fixation of small bone fractures, comprising a washer with a central bore, said central bore having a diameter, and an external tapered thread for engaging an outer bone fragment, and a bone screw having a shaft with a thread with a major diameter less than said diameter of said central bore for engaging an inner bone fragment, and having a screw head larger than said central bore, wherein an upper portion near said screw head of said shaft is disposed within said central bore, and said screw head is disposed exterior said washer and engages a portion of said washer.