Hydroxyapatite coating of hip prostheses. Effect on migration into the femur.
We studied two groups of femoral hip prostheses: 43 TiAlV ridged press-fit stems, and 26 with similar stems coated with hydroxyapatite on the proximal half. At one year, radiological measurement showed a mean downward migration of 0.99 mm for the TialV prostheses and 0.12 mm for the HA-coated prostheses (p = 0.0002). Hydroxyapatite coating appeared to provide effective bio-active supplementary fixation.
Kroon
P O
PO
Bone and Joint Research Unit, Royal London Hospital Medical College, England.
Freeman
M A
MA
D000328:Adult; D000368:Aged; D000497:Alloys; D017886:Durapatite; D005500:Follow-Up Studies; D005548:Foreign-Body Migration / Q000000981:diagnostic imaging*; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D006882:Hydroxyapatites; D008875:Middle Aged; D011474:Prosthesis Design; D011859:Radiography; D014025:Titanium
D000497:Alloys; D006882:Hydroxyapatites; C031462:titanium alloy (TiAl6V4); D017886:Durapatite; D014025:Titanium