Range of motion of standard and high-flexion cruciate retaining total knee prostheses.
Recently, use of high-flexion design was introduced in cruciate-retaining (CR) total knee prostheses. The purpose of this study was to prospectively compare the ranges of motion (ROMs) of 89 knees with standard and 87 knees with high-flexion CR total knee prostheses. Differences in age, gender, diagnosis, preoperative ROM of the knee, and Knee Society Score between the 2 groups were not statistically significant. At 12-month follow-up, average ROM was 112.0 degrees +/- 12.6 degrees for standard, and 115.3 degrees +/- 13.4 degrees for high-flexion CR prosthesis (P = .101). To our knowledge, this is the first report on the ROM with the high-flexion CR total knee prosthesis. Using the technique of anterior referencing for femoral component sizing and using a fixed 7 degrees slope for the tibial component, we found no significant differences between groups with regard to ROM, clinical, or radiographic parameters.
Department of Orthopaedic Surgery, Kansai Rosai Hospital, Amagasaki, Hyogo, Japan. yminoda@msic.med.osaka-cu.ac.jp
Yukihide
Y
Minoda
Masaharu
M
Aihara
Akira
A
Sakawa
Shinichi
S
Fukuoka
Keiko
K
Hayakawa
Kenji
K
Ohzono
D000368:Aged; D001168:Arthritis / Q000601:surgery*; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D011446:Prospective Studies; D011474:Prosthesis Design; D016059:Range of Motion, Articular