Osteoarthritis is a degenerative disease. Hip joint is most commonly affected by osteoarthritis.Articular cartilage is the smooth lining, which protects the hip's ball-and-socket joint surfaces. By diminishing friction the cartilage allows joint freedom of movement. The bone layer just beneath the articular cartilage is called subchondral bone. Articular cartilage degeneration occurs in osteoarthritis.
The subchondral bone is exposed and brushes against bone as the articular cartilage degenerates. Small outgrowths in the joint can form, called as bone spurs or osteophytes.
Grade Of Hip Osteoarthritis- 4 Grades of hip OA:
Grade 1- (doubtful OA), possible narrowing of the joint space medially and possible osteophytes around femoral head;
Grade 2 -(mild OA), definite narrowing of the joint space inferiorly, definite osteophytes, and slight sclerosis;
Grade 3 -(moderate OA), marked narrowing of Inter articular space of hip joint
Grade 4-( Severe)
- Increasing age
- Family history of osteoarthritis
- Previous injury to the hip joint
- Improper formation of the hip joint at birth, a condition known as developmental dysplasia of the hip