It's kind of hard to say which model is most reliable. Taken care of properly, they'll all hold true. But there are some models more prone to certain things (subframe, etc) than others, but again, the main thing is how well it was looked after by the person before you.
obÂ·tuÂ·raÂ·tor forÂ·aÂ·men. A large, oval or irregularly triangular aperture in the hip bone, the margins of which are formed by the pubis and the ischium; it is closed by the obturator membrane, except for a small opening for the passage of the obturator vessels and nerve. Synonym(s): foramen obturatum [TA] .
The obturator ring fractures appear as cortical discontinuities as well as areas of increased density where the bone fragments are overriding.he whole pelvis forms yet another, larger ring. Each of the sets of ribs form a ring with the sternum and spine. Each vertebra has a ring (also known as the spinal canal). The mandible and skull form a ring system, and the zygomatic arch is also considered a ring bone.