Re: Basal thumb joint pain
I think that if you check you will find that this method-remove the trapezium and divide a tendon and use it rolled up as a spacer between the bones is the most common surgery for basal thumb arthritis and very successful. There are several variants of this surgery, all with excellent outcomes. I am almost through recovery from that surgery and it was the easiest surgery I have had. If you check Hadena's thread you can find out more about it.
Depending on how bad your thumb is, you may be able to get away with just a cortisone shot to calm things down for several months to a year, with bracing, or with other surgeries that re-align the joint.
Good luck on your appointment and let us all know how it goes.