US 6,663,670 B2 · Adjustable long bone prosthesis

Abstract

A long bone prosthesis includes upper and lower articulating components, with the free ends of the components configured to engage a corresponding prosthetic joint. The overall length of the articulating components is adjustable to approximate the length of a patient's long bone, such as the humerus. The articulating components include a stem and collet arrangement for fixing the relative axial and rotational position of the components. A tapered lock nut is threaded onto the outer threaded surface of the collet portion to provide a pressure engagement of the articulating elements. Various surface features can be implemented among the components of the prosthesis to enhance the pressure fixation, restrict rotation or provide indexed movement of the articulating components relative to each other.

Claims26

Dependent claims

An adjustable long bone prosthesis comprising:

a first elongated component having a free end and an opposite end having an elongated stem;
a second elongated component having a free end and an opposite end having an articulating portion adjustably mateable with said elongated stem so that said first and second components define an adjustable length to approximate the length of a long bone, said articulating portion including a collet having a threaded outer surface and an inner surface arranged for pressure engagement with said elongated stem when said collet is compressed about said stem;
and
a nut having a threaded inner surface in threaded engagement with said outer surface of said collet, wherein at least one of said collet and said nut defines a tapered surface arranged so that threading said nut onto said collet compresses said collet about said elongated stem.

1 more element

Dependencies are inferred from the claim text.

Adjustable long bone prosthesis

Life of this patent

Adjustable long bone prosthesis

Life of this patent

Abstract

Claims26