Importance

Loading Importance Indicators...

Abstract

Disclosed is an endoprosthesis device and method of installing the same immovably in a medullary canal under a constant predetermined uniformly distributed pressure. The rigid prosthesis stem is typically embraced by an elastomeric element designed for continuous pressurization into compressed resilient anchorage with the medullary canal surface. The tubular elastomeric element can be pressurized in various ways such as by a captive gas, or by a fluent material until this material takes a set, or by a combination of pressurized gas and settable fluent material. When a captive pressurized gas is used, along or with a settable material, it provides a major portion of the elastic energy anchoring the prosthesis immovably in place; and when a settable pressurizing medium is used, the elastic energy is stored in the compressed thick elastomer. The constant elastic energy fosters bone growth to augment prosthesis anchorage. Permanent anchorage is achieved virtually instantly following alignment and pressurization of the prosthesis. When a settable material is used, the stem may include a withdrawable wedge to facilitate separation of the remainder of the prosthesis from the medullary canal. The expandable/compressible elastic component readily compensates for irregularity in the canal wall and requires a minimum of preliminary preparation of its surface.

Loading the Abstract Image...

First Claim