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] .
Obturator internus. The obturator internus is a fan-shaped muscle located in the pelvis. The muscle originates partly from the inner surface of the obturator membrane that covers most of the obturator foramen, an opening between two sections of the hip bone.The rest of the muscle originates along the bony back edge of the foramen.bturator internus. The obturator internus is a fan-shaped muscle located in the pelvis. The muscle originates partly from the inner surface of the obturator membrane that covers most of the obturator foramen, an opening between two sections of the hip bone.