acetabuli definition
n. pl. ac·e·tab·u·la (-lə) 1  1. Anatomy The cup-shaped cavity at the base of the hipbone into which the ball-shaped head of the femur fits. 2  2. Zoology A cavity or socket in the body of an insect into which an appendage fits. 3  3. Zoology A cup-shaped structure, such as the sucker of a tapeworm or leech. Os acetabuli are unfused secondary ossification centres of the acetabulum. Os acetabuli are located at the anterosuperior margin. They are rounded in shape with a concave lateral border and convex medial border. They may be bilateral and partially fused to the acetabulum. Os acetabuli are normally seen in children but typically fuse in mid-to-late teens, being uncommonly seen in adults. Protrusio acetabuli. Radswiki et al. Acetabular protrusio (also known as acetabular protrusion) is intrapelvic displacement of the acetabulum and femoral head, so that the femoral head projects medial to the ischioilial line. It should be differentiated from coxa profunda. The socket in the side of the bony pelvis into which the spherical head of the thigh bone (FEMUR) fits. The word is derived from the Latin acetum , vinegar and abulum , the diminutive of abrum , a container. The acetabulum was thought to resemble a small vinegar cup. a disease characterized by an inward bulging of the acetabulum into the pelvic cavity, resulting in protrusion of the femoral head; found in association with arthritis of the hip joints, usually rheumatoid arthritis. Synonym(s): Otto pelvis, protrusio acetabuli. A rare sporadic condition characterised by joint contractures, dislocations, rigid skeletal deformities (e.g., clubfoot or talipes equinovarus), skin atrophy and replacement of limb muscles with fibrous tissue. Protrusio acetabuli. Protrusio acetabuli is an uncommon defect of the acetabulum. The acetabulum is the socket that receives the femoral head to make the hip joint. The hip bone of the pelvic bone/girdle is composed of three bones, the ilium, the ischium and the pubis. Medical Definition of Acetabular. Acetabular: Pertaining to the acetabulum, the cup-shaped socket of the hip joint which is a key feature of the pelvis. The head (upper end) of the femur (the thighbone) fits into the acetabulum and articulates with it, forming a ball-and-socket joint. The acetabulum is not just cup-shaped. In protrusio deformity, there is medial displacement of the femoral head in that the medial aspect of the femoral cortex is medial to the ilioischial line. The socket is too deep and may protrude into the pelvis. 1 Classification 1.1 Primary protrusio acetabuli. (ăs′ĭ-tăb′yə-ləm) n. pl. ac·e·tab·u·la (-lə) 1. Anatomy The cup-shaped cavity at the base of the hipbone into which the ball-shaped head of the femur fits. 2. Zoology A cavity or socket in the body of an insect into which an appendage fits. Diagnosis of protrusio acetabuli is made on the basis of an antero-posterior radiograph of the pelvis that demonstrates a centre-edge angle greater than 40 degrees and medialization of the medial wall of the acetabulum past the ilioischial line (4).
Protrusio acetabuli is an uncommon defect of the acetabulum.