Picture montage periodontitis (IMAGE) Umea University Caption The image on the left shows a upper front tooth in an individual with periodontitis. On the right is an X-ray of the same tooth, revealing a significant reduction in the tooth's bone support. Normally, the jawbone level would be at the green line, but it has now receded to the red line. Consequently, the tooth root has almost no attachment to the jaw. Credit Elin Kindstedt Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.