You wouldn't be able to see work done on the occlusal surface from a radiograph if it was pretty shallow. Fissure sealants and flowable composite don't have great radiopacity anyway. And if it flaked off like doctoothache had mentioned, you definitely wouldn't have seen anything at all.
But if work WAS done, I'm sure Mad Jack's dentist would have seen something intraorally upon Mad Jack's specific request. I don't know if a procedure was actually done, but if it was done on the labial of 22 as Mad Jack says...
I'm sure it would be noticeable. Maybe his dentist just ran the drill and prodded Mad Jack with an instrument to make it seem like he did something. Haha. But of all teeth in the mouth, and all the obscure surfaces, why pick an anterior tooth?