This 1988 case series from Hospital for Special Surgery examines periprosthetic soft tissues from nine failed Ti-6Al-4V total hip arthroplasties. Using histology and atomic absorption spectrophotometry, it quantifies the metallic debris burden and determines whether debris arose from wear or corrosion. All nine hips were revised within 57 months — seven for aseptic loosening, two for infection.
When titanium was introduced as a femoral component material in the 1970s–80s, its corrosion resistance and biocompatibility in stable implants led most surgeons to assume that black tissue staining at revision was a benign cosmetic finding. Agins et al. Were the first to quantify the debris burden and prove — through elemental ratio analysis. That the black material represented true mechanical wear particles, present in concentrations orders of magnitude above normal and associated with tissue necrosis in every case.
The practical takeaway: titanium alloy is an excellent stem material (lower modulus, resistance to stem fracture) but a poor articulating surface material. This paper is the foundational evidence behind why modern THA uses cobalt-chromium or ceramic femoral heads rather than titanium.
When you revise a failed titanium THA and find black-stained tissues, recognize this as titanium metallosis with a predictable histologic response: histiocytes laden with submicron wear particles, focal necrosis, and foreign-body giant cells. In cases with the heaviest metal burden, a lymphoplasmacytic reaction may indicate metal hypersensitivity.
Carbon-fiber-reinforced polyethylene is contraindicated as an acetabular liner against a titanium femoral head. The authors explicitly state it enhances the abrasive effect.
This 1988 case series from Hospital for Special Surgery examines periprosthetic soft tissues from nine failed Ti-6Al-4V total hip arthroplasties. Using histology and atomic absorption spectrophotometry, it quantifies the metallic debris burden and determines whether debris arose from wear or corrosion. All nine hips were revised within 57 months — seven for aseptic loosening, two for infection.
When titanium was introduced as a femoral component material in the 1970s–80s, its corrosion resistance and biocompatibility in stable implants led most surgeons to assume that black tissue staining at revision was a benign cosmetic finding. Agins et al. Were the first to quantify the debris burden and prove — through elemental ratio analysis. That the black material represented true mechanical wear particles, present in concentrations orders of magnitude above normal and associated with tissue necrosis in every case.
The practical takeaway: titanium alloy is an excellent stem material (lower modulus, resistance to stem fracture) but a poor articulating surface material. This paper is the foundational evidence behind why modern THA uses cobalt-chromium or ceramic femoral heads rather than titanium.
When you revise a failed titanium THA and find black-stained tissues, recognize this as titanium metallosis with a predictable histologic response: histiocytes laden with submicron wear particles, focal necrosis, and foreign-body giant cells. In cases with the heaviest metal burden, a lymphoplasmacytic reaction may indicate metal hypersensitivity.
Carbon-fiber-reinforced polyethylene is contraindicated as an acetabular liner against a titanium femoral head. The authors explicitly state it enhances the abrasive effect.