The Illinois Appellate Court, 1st Dist. Caywood v. Gossett, No. 1-06-2458 (April 11, 2008) 6th div. (OMALLEY) Affirmed; Because plaintiff knew, or should have known, that her condition, with severe sinus infection and fistula between site of tooth extraction and her sinuses was the result of treatment provided by defendant, dentists, on or before her third surgery to correct it, it is barred by limitations period of Section 13-212 of Code of Civil Procedure. Further, the continuous course of negligent treatment exception does not apply to her circumstances; because she saw several specialists during relevant time period, some of whom told her that her tooth extraction caused her problems.