Acetabular shell with screw access channels
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United States of America Patent
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Mar 23, 2004
Grant Date -
Jul 17, 2003
app pub date -
Jan 11, 2002
filing date -
Jan 11, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An outer shell for a socket of a joint prosthesis is disclosed. The outer shell includes an outer wall defining an outer surface of the shell and an inner wall defining an inner surface of the shell. The outer wall has pores to permit bone tissue to grow into the outer wall, and the inner surface of the shell engages the socket. The inner wall has access channels suitable for seating a bone screw. The access channels are closed off by an associated integral section of the shell. Preferably, each access channel is closed off by a section of the outer wall so that the shell retains maximal outer surface area for bone tissue ingrowth. When a number of bone screws are needed for affixation of the shell to bone, a number of locations for bone screws can be created in the shell by opening the closed access channels.
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