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 (noun). an apparatus designed to close an unnatural opening, as a fissure of the palate. Obturator (adj). serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve.Origin: [NL., fr.L. obturare to stop up: cf.n apparatus designed to close an unnatural opening, as a fissure of the palate. Obturator (adj). serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. Origin: [NL., fr.