Final answer:
The major radiographic features of osteoarthritis include joint deformities, loss of articular cartilage, joint space narrowing, and the presence of bone spurs or osteophytes.
Step-by-step explanation:
Osteoarthritis (OA) is a joint disease that results from the breakdown of joint cartilage and bone. The major radiographic features of osteoarthritis include joint deformities, such as bony nodules on the finger joints or bunions on the feet. X-rays can show the loss of articular cartilage, joint space narrowing, and the presence of bone spurs or osteophytes. These features help in diagnosing and assessing the severity of osteoarthritis.