Morse taper
First Claim
1. An improved orthopedic taper joint for holding two bones together comprising two segments, one segment having a cylindrical male taper narrower at its connecting end and the other segment having a mating female taper wider at its connecting end, each segment having a face around the taper such that said faces are opposing when said segments are assembled, wherein a recess is located on the periphery of one of said faces such that a rotatable key can be inserted and rotated to force said segments longitudinally apart to disconnect the two bones held together, and wherein an interfitting lug is positioned on the face opposite the face defining said recess, said lug being substantially the width of said recess, but shorter than the depth of said recess, causing the formation of a slot between the end of the lug and the bottom of said recess when assembled, and wherein said rotatable key has a cam mounted on one end of a handle, wherein said cam is sized to fit within said slot and is rotatable therein, and wherein said segments have retaining wire mesh sections along the sides of said segments to allow tissue and bone to grow into said wire mesh sections and securely affix said structure to the bones to be joined.
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Accused Products
Abstract
An improved Morse taper consisting essentially of a male taper and a mating female taper, one of the tapers having a key recess at the periphery of a mating face such that a key can be inserted and rotated to force the segments longitudinally apart from its assembled embodiment such tapers are particularly useful in skeletal structures. A distraction key with a cam designed to fit in and rotate in the key recess is also described.
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Citations
4 Claims
- 1. An improved orthopedic taper joint for holding two bones together comprising two segments, one segment having a cylindrical male taper narrower at its connecting end and the other segment having a mating female taper wider at its connecting end, each segment having a face around the taper such that said faces are opposing when said segments are assembled, wherein a recess is located on the periphery of one of said faces such that a rotatable key can be inserted and rotated to force said segments longitudinally apart to disconnect the two bones held together, and wherein an interfitting lug is positioned on the face opposite the face defining said recess, said lug being substantially the width of said recess, but shorter than the depth of said recess, causing the formation of a slot between the end of the lug and the bottom of said recess when assembled, and wherein said rotatable key has a cam mounted on one end of a handle, wherein said cam is sized to fit within said slot and is rotatable therein, and wherein said segments have retaining wire mesh sections along the sides of said segments to allow tissue and bone to grow into said wire mesh sections and securely affix said structure to the bones to be joined.
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4. A bone joint comprising the combination:
- a first segment having an extending portion to be received within a bone cavity and terminating in an enlarged head portion having an inner set depending taper narrowest at its terminus; and
a second segment having an extending portion to be received within a bone cavity and having an opposed enlarged head portion having a recess adapted to receive said inner set depending taper in mating engagement, one of said enlarged head portions having a slot for receiving a tool such that upon rotation of said tool longitudinal forces are imparted to each of said first and second segments to separate the same.
- a first segment having an extending portion to be received within a bone cavity and terminating in an enlarged head portion having an inner set depending taper narrowest at its terminus; and
Specification