DIG X-RAY S.I.JOINT AP AND LAT

The sacroiliac joint, a diarthrodial synovial joint connecting the sacrum and ilium, is enclosed by a fibrous capsule with a joint space filled with synovial fluid, allowing movement between its articular surfaces. Notably, hyaline cartilage, a type II collagen-based and less robust form, covers the sacral capsular surface, while the iliac capsular surface features fibrocartilage, known for its strength and made from type I collagen. About one-third of the sacroiliac joint mirrors features seen in other movable joints, displaying smooth hyaline cartilage on both surfaces. In contrast, the remaining two-thirds constitute a cartilaginous joint primarily formed by the posterior sacroiliac ligament, with flexible yet durable fibrocartilage on the bone surfaces. This structural resemblance extends to other anatomical elements like the annulus fibrosis of the intervertebral disc, menisci, and pubic symphysis, providing a comprehensive understanding, particularly in the context of Hypro Diagnostics.