The American Academy of Periodontology has released an online tool to help patients determine risk for periodontal diseases. The tool, which is located at www.perio.org/consumer/4a.html, includes a short questionnaire for patients to complete. Once submitted, a calculation based on the PreViser formula, determines whether the patient is at low, medium, or high risk for developing periodontal diseases. An individualised profile report appears, including referral recommendations.