Anthropometry of the proximal tibia to design a total knee prosthesis for the Japanese population.
Anthropometric data on proximal tibiae of 100 knees in 80 Japanese patients undergoing total knee arthroplasty were obtained. Anterior-posterior (AP) and medial-lateral (ML) lengths of the tibia were measured on computed tomography scans and intraoperatively on tibial resection surfaces. A special small component is unnecessary, and size variation should focus on ML length of 65 to 75 mm because this includes 90% of women's knees. AP-to-ML ratio had a negative correlation with ML length, indicating that small knees were longer in the AP direction. Most prostheses had AP mismatch up to 5 mm for small women's knees. These data could provide the basis for designing the optimal tibial component for most of the Asian-Pacific population.
Uehara
K
K
Department of Orthopaedic Surgery, Osaka City University Medical School, Abeno-ku, Osaka, Japan.
Kadoya
Y
Y
Kobayashi
A
A
Ohashi
H
H
Yamano
Y
Y
D000368:Aged; D000369:Aged, 80 and over; D000886:Anthropometry; D019645:Arthroplasty, Replacement, Knee; D044466:Asian People; D005260:Female; D006801:Humans; D007564:Japan; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D013977:Tibia / Q000033:anatomy & histology*