Hi,
Here is a link to a article that discusses the procedure.
It states:
The first prosthesis is a surgical obturator prosthesis and it is placed in the mouth at the time of surgery. It immediately restores the contour of the mouth and allows for speech and swallowing after surgery. In most cases the patient is able to start a liquid diet immediately and then progresses to a soft diet within two or three days.
http://www.mdanderson.org/Departmen...p;pn=DC30F0BF-7545-11D4-AEC300508BDCCE3AAny surgery is serious and scary, but post-op I am sure you will get pain management meds, be sent home right away, and should do just fine.