What Is the Prognosis for Osteoarthritis?

I am looking for some information on cervical osteoarthritis. My father has been diagnosed with this and is unable to get any valuable information, please help! His disease is deteriorating very quickly.

Osteoarthritis is a condition whereby cartilage softens and wears over time. When this affects the cervical spine in the neck, it is referred to as cervical osteoarthritis.

Cervical osteoarthritis can cause pain, stiffness, and limitation of motion of the neck. Occasionally, new bony growths, called spurs, and/or disc wear can directly irritate adjacent nerves. This can cause pain, numbness, and tingling radiating to the arms.