What does “Periodontal ligament” mean?
The periodontal ligament is the fibrous tissue around the tooth root that connects the tooth to the jawbone. It is part of the periodontal tissue that supports the teeth.
Tissue connecting roots and bones
Teeth are not directly attached to the bone. The fibers wrapped around the root connect the tooth and jawbone and form a support structure.
Distinguishing the periodontal ligament from the pulp
The pulp treated in root canal treatment is located inside the tooth. Because the periodontal ligament is on the outside of the tooth, root canal treatment and periodontal tissue health management require different evaluations.
Why the supporting tissues are assessed together
Periodontal disease can affect several tissues around the teeth. If a tooth feels loose or hurts when you chew, have your teeth and gums examined rather than assuming that a single tissue is responsible.
Frequently Asked Questions
Are periodontal ligaments and gums the same thing?
Both are tissues surrounding teeth, but their locations are different. The periodontal ligament is a fibrous tissue that connects the root to the bone.
If I receive root canal treatment, will the periodontal ligament disappear?
Root canal treatment deals with root canals inside the tooth. This treatment does not remove the supporting tissue on the outside of the tooth.
Questions to help you understand the periodontal ligament
Learn what the term means and how it relates to your dental condition.
- Sufficient understanding
Where does pain come from, inside or outside the teeth?
Explanation and evidenceWhen discussing the diagnosis, distinguish the location of the pulp from that of the periodontal ligament.
Australian Dental Association · Tooth anatomy - A choice suited to your condition
What is the overall condition of the supporting tissues?
Explanation and evidenceTooth mobility, gum inflammation, and the condition of the surrounding bone are assessed together.
National Institute of Dental and Craniofacial Research Periodontal (Gum) Disease

