Thanks for query,
As age advances there are degenerative changes take place.
Osteo artherits is such degenerative changes took place in joint.
Osteophytes and space reduction and loose body are result of these changes giving rise to pain,lock joint,stiffness
at the joint and restricted movement at the joint.
Go for physiotherapy
Give calcium,Vit A,D.and multivitamin
Ok and bye.