Hi i am. going to be having a molar surgically extracted because it is close to my sinuses and am wondering what anesthetic will they probably use?

Probably local: anesthetic injection, and sedating or light sleep (nitrous oxide gas) or something like that. Their dental anesthesiologist or nurse anesthetist will discuss which is best for you depending on what has worked for you in the past, how long the procedure will last, and what will make you most comfortable. Most importantly, they'll chose something that will not make you remember the pain involved.

General Anesthesia: If your surgery is done in an operating room at an hospital, you most likely will have general anesthesia and be intubated once unconscious. The exact anesthetic agents will depend on your health status, medical conditions etc..If done in an oral surgeon office, you will receive sedating agents intravenously that will make you very sleepy, you will be breathing on your own.