Luxation is defined as?

Luxation refers specifically to a complete dislocation of a joint, where the bones involved are entirely displaced from their normal anatomical position and lose all contact with each other. This severe condition indicates a total disruption of bone alignment and requires immediate medical intervention to restore proper positioning and function.

In contrast to the other options, which describe different conditions or presentations in the realm of joint and bone health:

• The partial separation referred to in the first choice describes a subluxation rather than a luxation. A subluxation involves a misalignment where the bones are still partially in contact.

• The second option pertains to inflammation of joint fluid, which relates to conditions such as synovitis or arthritis, but does not represent a displacement of bone.

• The final choice discusses degenerative changes in joint cartilage, commonly associated with osteoarthritis, which again does not involve the complete separation of bones that characterizes luxation.

Therefore, the definition of luxation as a complete dislocation with total disunion of bone apposition is accurate and encapsulates the seriousness and implications of the condition.