Taken individually, your symptoms are non-specific, and could reflect a wide variety of different issues. However, taken together, they strongly suggest a chronic oral-antral fistula
-- an opening between your sinus and your mouth that was created at the time of your upper molar extraction
. This is a common complication of upper molar extraction, because the root tips of the upper molars are situated quite close to the floor of the sinus, and extraction can inadvertently remove the thin partition of bone that separates the sinus from the tooth.
An oral-antral fistula could cause a chronic inflammation in the sinus, but can also be difficult to detect on a CT scan; in fact, the opening allows sinus pus or other inflammatory exudate to drain out of the sinus, which can eliminate one of the tell-tale signs that would have tipped off the radiologist that you do indeed have a chronic sinusitis. The finding of "white blood cell growth" in your sinus and the "awful scent" to which you refer is further evidence that you have an active sinus infection. The widespread numbness, while possibly an independent issue, is suggestive of the dysesthesia or malaise that often accompanies any systemic infection.
Even though treatment of a sinus infection is not within the domain of dentistry
, in your case the cause is dental
, and you must close that oral-antral fistula in order for a resolution to your problem. Your real treatment omission was a failure to return to a dentist. I'm not suggesting you return to the same dentist; after all, he was the one that got you into this situation in the first place. You should schedule an appointment with an oral surgeon, so that the proper inspection of the surgical site can be done.
To find an oral surgeon, you may consult the online directory of the American Association of Oral and Maxillofacial Surgeons