K05.2: Acute periodontitis

Your periodontal ligament is inflamed.

The tooth is anchored firmly in the jawbone by the periodontal ligament. This ligament includes, among other things, the outermost layer of the tooth root and the gums. The periodontal ligament also includes the hole in the jawbone in which the tooth is located.

The periodontal ligament can become inflamed for instance if you do not clean your teeth properly. In that case, the inflammation develops due to the bacteria found in plaque. The periodontal ligament can also become inflamed as a result of other diseases.

It is common for the gums to be inflamed initially before other parts of the periodontal ligament are inflamed. If the gums are inflamed, they can be reddened and bleed more rapidly.

If the periodontal ligament is inflamed for a long time, the gums may retract from the tooth necks. The teeth may then also become loose. Every tooth consists of three sections: the crown, the tooth neck (cervix) and the tooth root. The crown is the visible part of the tooth. The tooth neck is covered by the gums. The tooth root keeps the tooth in the jawbone. As a result of the inflammation, pus may also accumulate. In that case, pain in the jaw is common.


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the diagnostic confidence indicator.
Your doctor will assist you with any health-related questions and explain the ICD code to you in a direct consultation if necessary.


Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).

Further articles

Gingivitis and periodontitis

Gingivitis is usually harmless and is soon gone again. But sometimes the inflammation spreads and damages the periodontium. Then it is called periodontitis.