Yup, my primary stapedectomy failed the same way after 6 months. I was able even had a hearing test done while I pressurized my ears and did score a little better. Secondary stapedectomy revealed an eroded incus and that failed in about 3 weeks with a conventional wire-piston prosthesis. Second revision survery with lippy prosthetic is entering into year 3 with no degradation.
iprickle had it almost right. You want to see the best surgeon for revision stapedectomies. When I had mine done, two years ago, this was W.Lippy in Warran Ohio (google lippy video library for lots of great info, watch the eroded incus one in particular). I believe he has retired, but his practice is still open and I know he has been mentoring a Dr.Bernholtz for many years. At least one member here has had a successful primary from Dr.B. This practice is very receptive to written requests, I suggest you send them all the information in a letter and see what they say.