louienm,
Psoas tenotomies (tenotomy means to release a tendon) can be done for painful snapping hip syndrome. Tenotomies of the medial adductor muscles are usually only done for adduction contractures which interfere with ambulation or hygiene.
It is rare to do a tenotomy just for groin pain.
If the pain is significantly hampering your lifestyle, you should seek another total joint surgeon. There are many things which can cause groin pain after a total hip replacement, from minor to major problems. Minor things would be things like a bursitis, major could be something like an indolent infection or loosing of the components.
Again, you might want to see another surgeon for an evaluation.
Good luck.