Not sure it's just a case of a dynamic needing to be broken. That again assumes the woman has a sexual side ready and waiting as soon as the dynamic is broken through. The question is, if you try to break the dynamic, is there a sexual side to her?
Again, it's about like asking when am I going to be able to break through the dynamic of withholding my homosexuality? Uh, there's nothing there to break through to. The example helps me understand what some LD or ZD people are going through. If the world suddenly consisted only of men, and it was suddenly the norm for them to be married to each other, I'd be completely nonsexual, and spending my fantasy hours drawing sketches of mythical creatures I'd call "women". And I'm sure my male partner would send me to therapy for hours of useless counseling.
If there were no women on the world, society would be much like the "Planet of the Apes". We'd all be savages.
If there were no women on the world, society would not have advanced as far, as much of male achievement is based off the side benefit of the women he is able to draw.
ssmguy, perhaps in your case that the sexual drive and function is either non-existent, or she is using it elsewhere.
If I were in your shoes, I'd be willing to try anything to get it going again. Even by 10 years ago I would have been willing to try anything.
I would have already suggested "sex toys", I would ask her to go to a "male strip club", even taking her, if it got as bad as yours - I'd even suggest she take up a lover, if she really is shut down perhaps that would get things going again.
Plus female hormone replacements and the such, I believe you mentioned that you tried this avenue.
As for your own needs. You have already proven that you are loyal and dedicated, but at some point in time one would look at getting out the marriage or getting that need met outside of the relationship.