The most proximal aspect of the socket, the brim, includes ischial ramus containment (IRC) and associated trim lines proximal to the ischial tuberosity (IT).
Abbreviations: AB = abduction, AD = adduction, IRC = ischial ramus containment, IT = ischial tuberosity, TFA = transfemoral amputation, VAS = vacuum-assisted suspension.
In their evaluation of acetabular anteversion on revised, cemented polyethylene cups, Hultmark and colleagues (22) measured anteversion as the angle between the anterior cortex of the ischial ramus
and the cup.
The fibres to the ischial ramus
, which form a sickle shaped extension, are known as the falciform ligament (Romanes, 1964) (Figure 2).
I did not have an ray until recently, months after the pain developed, and now I found out that I had a stress fracture of the pubic ischial ramus
all this time.