Osteoarthritis : degenerative joint
Osteoarthritis (OA, also known
as degenerative arthritis, degenerative joint disease),
is a condition in which low-grade inflammation results
in pain in the joints, caused by wearing of the
cartilage that covers and acts as a cushion inside
joints. As the bone surfaces become less well protected
by cartilage, the dog experiences pain upon weight
bearing, including walking and standing. Due to
decreased movement because of the pain, regional
muscles may atrophy, and ligaments may become more
lax. Osteoarthritis is the most common form of arthritis.
The main symptom is chronic
pain, causing loss of mobility and often stiffness.
"Pain" is generally described as a sharp
ache, or a burning sensation in the associated muscles
and tendons. OA can cause a crackling noise (called
"crepitus") when the affected joint is
moved or touched, and dogs may experience muscle
spasm and contractions in the tendons. Occasionally,
the joints may also be filled with fluid. Humid
weather increases the pain in many casa.