Transcutaneous prosthesis

Abstract

A transcutaneous prosthesis includes a first component configured for attachment to a bone, the first component including flutes or grooves on a surface thereof for deterring rotation of the prosthesis within a bone; a second component adapted for location between the bone and the skin, the second component having a surface treatment for stimulation of fibroblastic cell proliferation and attachment of epithelial cells; and a third component adapted for location to extend from the skin surface and is adapted to extend directly from the skin surface in use, the third component having a coating of a non-stick material on an outer surface thereof, the coating having a surface energy that is lower than a surface energy of the first and second components and which is low enough to deter bacterial adhesion.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. application Ser. No. 11 / 306,584, filed Jan. 3, 2006, which is a continuation of U.S. application Ser. No. 10 / 311,589, filed on Apr. 28, 2003, which is now U.S. Pat. No. 7,014,661, which is a national stage filing of PCT / GB01 / 02771, filed on Jun. 22, 2001, which claims the priority of GB 0015479.9, which was filed on Jun. 23, 2000.FIELD OF THE INVENTION[0002]This invention relates to transcutaneous prosthesis and includes a method of fitting a prosthesis having a transcutaneous component to a patient.BACKGROUND OF THE INVENTION[0003]Amputation of limbs or digits can occur due to trauma or because of surgical removal. Examples of trauma include loss of fingers in machinery accidents, loss of limbs in car accidents or as a result of land mine explosions. Surgical removal can also be indicated as a result of cardiovascular disease, diabetes and cancerous tumours to the bone or soft tissues.[00...

AI Technical Summary

Benefits of technology

The present invention provides a prosthesis that overcomes disadvantages of previous designs. The prosthesis has three components: a first component that is implanted into bone, a second component that is located between the bone and the skin, and a third component that is located externally to the skin. The first component is attached to the bone, which allows for better load transmission and motion. The second component stimulates fibrous tissue growth and deters bacterial adhesion. The third component has a low surface energy that deters bacterial adhesion and is designed to encourage tissue ingrowth. The prosthesis is designed to be connected together or formed integrally with appropriate surface treatments. The external component has a safety device that breaks under an unusual load to prevent damage to the bone or skin. The second component may also be provided with through holes to facilitate tissue growth. Overall, the prosthesis has improved load transmission, motion, and reduced inflammation and discomfort.

Problems solved by technology

A number of disadvantages arise from the use of such endo-prosthetic devices.

(1) Skin is not a satisfactory high load bearing structure and often breaks down under load, becoming inflamed and uncomfortable and, in severe cases, pressure sores are formed which are difficult to heal.

(3) The use of sockets for receiving the stump are commonly sweaty and uncomfortable.

(4) Where a joint is involved, the external prosthesis is usually moved by muscle groups situated at a distance from the attached prosthesis and therefore motion is inefficient and unnatural.

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