What does it do?
Attachment, force distribution and sensing load.
← All explanationsPeriodontal ligament
Is a tooth rigidly fixed in bone?
The periodontal ligament is the narrow fibrous tissue between a tooth root and its socket. Its fibres connect root cementum to bone. It distributes forces and contains vessels and nerves; it is not a hard layer of the tooth.
For training & practice ↓
AI-generated
Choose a view
A living connection
Fibres run in different directions between root and bone, allowing slight physiological movement.
Sensing forces
Nerves help sense biting forces. A spring is only an analogy; this tissue is not a rubber band.
Assess symptoms
Pressure pain or unusual looseness has several possible causes and should be assessed. Repeatedly wiggling the tooth is not a useful self-test.
At a glance
When is it relevant?
In tooth support, tooth movement and biting symptoms.
What should be avoided?
Repeatedly testing looseness yourself.
Knowledge in motion
Explained in 36 seconds.
Three steps. No audio.
Each scene can also be selected manually.
Silent educational film with German on-screen text and simplified teaching images. Not a patient case or a promised treatment outcome. The full English explanation is available below.
Read the film text in English
A living connection
Fibres run in different directions between root and bone, allowing slight physiological movement.
Sensing forces
Nerves help sense biting forces. A spring is only an analogy; this tissue is not a rubber band.
Assess symptoms
Pressure pain or unusual looseness has several possible causes and should be assessed. Repeatedly wiggling the tooth is not a useful self-test.
Often confused
Ligament or cementum?
Cementum is hard tissue covering the root. The ligament is the fibrous connection to bone.
Quick answers
Is the ligament the pulp?
No. Pulp is inside the tooth; the ligament lies outside the root.
Does an implant have this tissue?
A healed dental implant has a different bone attachment and no natural periodontal ligament.
Does movement always mean periodontitis?
No. Slight movement is physiological; unusual changes need assessment.
At the practice
For a personal discussion
An editorially suggested question for a discussion with Dr med dent Niusha Barahmand Pour:
Which structure might explain pressure pain, and what needs assessment?
A tooth feels different on biting? Have the cause and its support assessed.
Discuss the symptomsAppointment selection at DoctolibLearning layer for training & practiceUnderstand terminology and deepen knowledge
- Periodontal ligament
- The fibrous attachment around a root.
- Sharpey fibres
- Fibre-bundle ends embedded in hard tissue.
- Physiological
- Within normal function.
Make the distinction
Cementum is hard tissue covering the root. The ligament is the fibrous connection to bone.
Sources and context
Editorial research: . General information, not an individual diagnosis or treatment recommendation. Teaching illustrations are simplified and do not depict a patient case.