Compliant Implantable Prosthetic Joint With Preloaded Spring
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United States of America Patent
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Issued Date -
Feb 4, 2010
app pub date -
Jan 23, 2009
filing date -
Jan 25, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An implantable prosthetic joint has a first component for attaching to a first bone and a second component for attaching to a second bone wherein the first and second components are connected in an articulating manner to provide the motion of a prosthetic joint. The joint includes at least one spring to provide compliance to the prosthetic joint. The at least one spring is preloaded in the artificial joint such that the spring is not allowed to move to a completely relaxed position. This preloading of the spring allows the maximum deflection of the spring to be used for shock absorption because the spring does not deform substantially when the implanted prosthetic joint is moved from an at rest position to a loaded or standing position. The prosthetic joints according to the present invention can include artificial hips, knees, shoulders, ankles, and intervertebral discs.
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