Coxarthrosis can be classified as primary when it is?

Coxarthrosis, also known as osteoarthritis of the hip, can be classified as primary when it develops without a clear associated cause. This type of coxarthrosis typically arises due to the natural aging process and wear-and-tear on the joint, which is why it is most often seen in individuals as they grow older, particularly in adulthood. Congenital factors can also contribute to the predisposition to primary coxarthrosis if there are structural abnormalities present from birth that lead to joint degeneration over time.

Choosing congenital in nature as the classification highlights that the condition is intrinsic and rooted in the body's development rather than being a direct consequence of trauma or injury, which aligns with the understanding of primary disease processes. Other potential causes, such as trauma, sports injuries, or direct mechanical stresses, would lead to a secondary form of the condition where external factors contribute to joint degeneration.