Knee replacement is required when:-
1)severe swelling, pain & stiffness present in knee.
2)mobility is reduced
3)knee pain hampering your sleep and quality of life.
4)ADLs(active daily life activities)like stair climbing, walking or driving etc.are disturbed.
5) professional and social life is being affected because of knee pain
6)Oxford knee score is between 0-29
TO know your knee score please click on the given link below….