Oral manifestations of Crohn's disease are granulomatous lesions. It rarely involves periodntal tissue.However, Crohn's disease may be associated with food intolerance.Please review the book titled" food allergy and intolerance" written by Brostoff and Challacombe,2nd edition, saunders
Ninety five percent of the population has some level of periodontal disease. The severity of the disease is important.If you are taking medication for the Crohns it would be necessary to see if there are side effects related to your oral health.