Measurement of bone mineral density by dual-energy X-ray absorptiometry around an uncemented knee prosthesis.
Dual-energy x-ray absorptiometry allows the measurement of bone mineral density (BMD) around an uncemented hip prosthesis, but has not so far been widely used to measure BMD around a knee prosthesis. We studied 16 patients undergoing total knee replacement using a Miller-Galante uncemented prosthesis for either osteoarthritis or rheumatoid arthritis of the knee. The precision of the measurement was improved by using a leg brace. The pattern of bone loss differed in the lateral projection by region (P = .001). There was significant loss of bone from the distal femur but not from the patella or proximal tibia over the 6-month period after insertion of a knee prosthesis.
Spittlehouse
A J
AJ
Osteoporosis Centre, Northern General Hospital, Sheffield, United Kingdom.
Getty
C J
CJ
Eastell
R
R
D015502:Absorptiometry, Photon / Q000379:methods*; D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000601:surgery; D015519:Bone Density; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery; D011474:Prosthesis Design