Forearm bone-anchored amputation prosthesis: a case study on the osseointegration

• BACKGROUND AND PURPOSE: Bone-anchored titanium implants have been used for anchorage of amputation prostheses for more than one and a half decades. Histo-logical and ultrastructural analyses were performed on a forearm amputation prosthesis after being in use for more than 11 years. MATERIAL, METHODS AND RESULTS: The implant was retrieved from the ulnar bone after a fatigue fracture of the titanium implant, and was clinically stable at the time of removal. The histological findings showed a large amount of bone within the threads and a high degree of apposition of mineralized bone to the implant surface. Ultrastructural analysis of thin samples prepared by focused ion-beam microscopy revealed an electron-dense layer at the interface and direct apposition of crystalline hydroxyapatite at the implant surface. INTERPRETATION: Our observations in this retrieval study provide a structural correlate to the functional properties and clinical results of amputation prostheses.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinsk bioteknologi -- Biomaterialvetenskap (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Medical Biotechnology -- Biomaterials Science (hsv//eng)

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine (hsv//eng)

Keyword

Aged

*Amputation

Amputation Stumps/pathology/surgery

Artificial Limbs

Biocompatible Materials

Durapatite

Forearm/pathology/*surgery

Humans

Male

*Osseointegration/physiology

*Prostheses and Implants/adverse effects

Prosthesis Failure

Stress

Mechanical

Time Factors

Titanium/adverse effects

TECHNOLOGY

Publication and Content Type

ref (subject category)

art (subject category)