Re: neuroma surgery complications
From your discussion, it sounds like a few things were done. First, the osteotomy was for a bunion correction, and the "neuroma" was excised from the space between the 2 and 3 toes. Was there any procedure done to the second toe? Often, these "neuromas" in this position aren't truely neuromas at all, but an irritation at the base or bottom of the second toe, which can manifest as symptoms similar to that of a "neuroma". Usually, "proper" treatment for this condition would consist of a different type of bunion procedure to decrease the pressure on the base of the second toe.
With that being said, during a "neuroma" procedure, the nerve that is being resected is close to muscles that control the inward and outward stabilization of the toes. Occasionally, the nerve looks like a tendon that is coursing from one of these muscles. If this tendon is cut (as opposed to the nerve), then the opposing muscle (on the other side of the toe) can then pull the toe that direction.
From the sounds of things, the doctor cut the tendons that your body uses to flex/extend your toe, which will deem the toe "floppy". Unfortunately, there is no way to repair this floppiness and occasionally IF it scars, it will be less floppy. It may require a fusion of one of the joints within the toe to gain some stability, but if I were you, I would get a second opinion prior to any further procedures on this foot.