Midterm outcomes of high-flexion total knee arthroplasty on Japanese lifestyle.
OBJECTIVE
To evaluate the clinical outcomes after total knee arthroplasty (TKA) using the Genesis II posterior stabilized prosthesis with a high-flex insert during the mid-term follow-up and to assess its effect on the Japanese lifestyle.


METHODS
Fifty-three consecutive patients (8 men and 45 women) underwent primary TKA. The mean follow-up time was 76 months (5-9 years). Clinical results were assessed with the Japanese Orthopedic Association osteoarthritis knee rating score (JOA knee score), range of motion, and lifestyle changes.


RESULTS
The postoperative JOA knee score improved significantly compared to the preoperative JOA knee score. The mean preoperative flexion range improved from 112° to 123° postoperatively (p < 0.05). Additionally, our findings showed that 39% of patients enjoyed a floor-sitting life preoperatively, but only 30% of patients enjoyed floor-sitting life postoperatively.


CONCLUSIONS
The postoperative range of knee motion and JOA knee score improved after TKA using the Genesis II posterior stabilized prosthesis with a high-flex insert, but the number of patients who enjoyed floor-sitting life decreased from 39% to 30% because of feelings of fear and discomfort.


METHODS
Level IV, Therapeutic study.
Kansai Medical University, Osaka, Japan. Electronic address: ohnoolive@gmail.com.
Hiroshi
H
Ohno
Kansai Medical University, Osaka, Japan.
Minoru
M
Murata
Kansai Medical University, Osaka, Japan.
Satoshi
S
Ozu
Kansai Medical University, Osaka, Japan.
Nariyasu
N
Matsuoka
Kansai Medical University, Osaka, Japan.
Hiroshi
H
Kawamura
Kansai Medical University, Osaka, Japan.
Hirokazu
H
Iida
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000534:rehabilitation*; D044466:Asian People; D005260:Female; D006801:Humans; D007564:Japan; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis / Q000009:adverse effects*; D008019:Life Style; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011446:Prospective Studies; D011474:Prosthesis Design; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012720:Severity of Illness Index; D016896:Treatment Outcome
Arthroplasty; Genesis II; High flexion; Japanese lifestyle; Knee
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