The dog's physiologic response to joint laxity is proliferative fibroplasia or thickening of the joint capsule and formation of osteophytes or new bone on the rim of the acetabulum and the femoral neck. (homevet.com)
This is a multifactorial disease and is caused by a combination of many issues, such as Hansen type - II interverteblral disk protrusion, ligamentous and articular process hypertrophy, osteophyte formation, and vertebral misalignment. (vetneurochesapeake.com)
Regardless of cause, CCL rupture results in stifle instability which sets into motion a cascade of events including synovitis, articular cartilage degeneration, periarticular osteophyte development, capsular fibrosis and medial meniscus injury. (homevet.com)