NEET PG DENTAL EXAM

Detailed explanation-1: -Structure and Function. The sacrum is made of five fused vertebrae configured as an inverted triangular bone that is concave anteriorly and convex posteriorly. Within the sacrum lies the sacral canal, which is a continuation of the vertebral canal. It terminates as the sacral hiatus.

Detailed explanation-2: -The sacrum is composed of three fused segments that become smaller progressively from cranial to caudal. The sacrum is fused to the ilium, thus connecting the spine to the pelvis and the pelvic limbs. The normal fusion of the three sacral segments defines the sacrum as a block vertebra (Figure 3-48).

Detailed explanation-3: -Components of the Sacral Region (Sacrum) As part of the pelvic girdle, the sacrum forms the back wall of the pelvis and also forms joints at the hip bone called the sacroiliac joints. The sacrum contains a series of four openings on each side through which the sacral nerves and blood vessels run.

Detailed explanation-4: -The sacrum forms the posterior pelvic wall and strengthens and stabilizes the pelvis. Joined at the very end of the sacrum are two to four tiny, partially fused vertebrae known as the coccyx or “tail bone". The coccyx provides slight support for the pelvic organs but actually is a bone of little use.