Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1994-12-07
1996-07-09
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
411369, 411537, 411915, A61F 230
Patent
active
055340326
ABSTRACT:
An orthopaedic implant assembly I including a securing member or screw 10 and sealing washer 20 assembled thereto. The assembly 1 further includes a base member 30 with a hole 31 therein for receiving the screw 10 and washer 20. The screw 10 includes an enlarged head 11 with an arcuate undersurface 14 with a groove surrounding head 11 for receiving the sealing washer 20 therein. The screw hole 31 includes a complementary arcuate surface to enable screw 10 to be inserted in a selectively variable angled orientation with respect to the screw hole 31 while the washer 20 provides a seal between the head 11 of screw 10 and the base member 30. The assembly 1 may further include an additional member 40 over the hole 31 and screw 10 and washer 20, such that this layer 40 generates wear debris. The sealing washer 20 provides a barrier to the advancement of the wear debris or particulate matter beyond the sealing washer 20.
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Geringer Margaret L.
Willse David H.
Zimmer Inc.
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