Which factors are classified under intraarticular mechanisms of spinal fixation?

Intraarticular mechanisms of spinal fixation primarily relate to the changes and conditions occurring within the joint space itself. The classification includes factors such as degeneration and intraarticular fluid, which directly affect the joint's motion and overall mechanics.

Degeneration refers to the wear and tear of the joint components, including articular cartilage, which can lead to altered biomechanics. Intraarticular fluid, including synovial fluid, plays a crucial role in joint lubrication and helps maintain motion and health. Changes in the quality or quantity of this fluid can impact joint function and contribute to spinal fixation.

These factors can lead to restricted motion and increased stiffness within the affected joints, which are considerations in understanding both the pathology and treatments related to spinal fixation. Hence, the classification of degeneration and intraarticular fluid as intraarticular mechanisms is justified by their direct influence on the joint environment and functioning.