With any major surgery it must be remembered that there is a small risk of complication, but these are always discussed in detail with you beforehand. Programmes of care and hospital routines are regularly revised to minimise these occurrences, which mean that issues such as pulmonary embolism and deep infection are rare.
After a total knee replacement the knee will always feel a little mechanical. Proprioception (natural stability) can be reduced in some situations but a good functional range of movement is the norm. For the vast majority of patients a knee replacement is the most effective procedure for providing pain relief for an arthritic knee.