when and when ??
jin,
ingeneral patients are referref for outpatient PT to review progress or to start advanced exercises ... in TKR you must emphasis on reganing quadriceps control, the pt starts to walk with two cruches, partial-weight bearing for 6 weeks, during the time you can transfer to sticks if possible! full bearing depending on the pail level, swelling, muscle power and ROM.
close -chain quadriceps over spongy ball, progressing to open chain.
http://orthoinfo.aaos.org/booklet/vi...pcategory=Knee