Unable to open mouth wide after recent surgery is there some way to get it back to normal?

Partial dislocation. You need to contact the facility where you had surgery and inform the anesthesia provider. During the course of general anesthesia and endotracheal intubation, you might have partially dislocated your jaw. If you are not able to get back to the facility, get an xray of your jaw. If it is partially dislocated, it can and should be reduced, similar to any joint dislocation.