What is involved?
The periosteum on the outside of bone.
← All explanationsPeriostitis
What is periostitis of the jaw?
Periostitis means inflammation of the periosteum, the thin tissue layer around bone that contributes to its nourishment and remodelling. In the jaw, irritation or inflammation may occur in connection with neighbouring disease. The term alone does not identify the cause or extent.
For training & practice ↓
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The periosteum lies on the outside
The periosteum covers the outer bone surface. It is not the same as the gums or the tooth-supporting tissues. A teaching image can show its location; a facial photograph cannot reliably identify periostitis.
A reaction can have different causes
The periosteum can react to various stimuli, including nearby inflammation. New bone visible on imaging may be described as a periosteal reaction. This finding alone does not prove a particular infection.
Assess the overall picture
Symptoms, examination and imaging when indicated are considered together. Rapidly increasing swelling, fever or restricted mouth opening call for urgent assessment. Breathing or swallowing difficulties are emergency warning signs.
Read the full explanation
The periosteum lies on the outside
The periosteum covers the outer bone surface. It is not the same as the gums or the tooth-supporting tissues. A teaching image can show its location; a facial photograph cannot reliably identify periostitis.
A reaction can have different causes
The periosteum can react to various stimuli, including nearby inflammation. New bone visible on imaging may be described as a periosteal reaction. This finding alone does not prove a particular infection.
Assess the overall picture
Symptoms, examination and imaging when indicated are considered together. Rapidly increasing swelling, fever or restricted mouth opening call for urgent assessment. Breathing or swallowing difficulties are emergency warning signs.
Notes on the teaching images
- Periosteum lies outside · teaching model
- Anatomy · no periosteal reaction shown
- Combine symptoms and findings
At a glance
What causes it?
This requires assessment; the term alone does not identify the cause.
Does every imaging reaction indicate infection?
No. Imaging and clinical findings must be interpreted together.
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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 as text.
Often confused
Periostitis or periodontitis?
Periostitis concerns the periosteum. Periodontitis is an inflammatory disease of the tissues supporting the teeth. The similar-sounding words refer to different structures.
Quick answers
Is periostitis the same as osteomyelitis?
No. Periostitis involves the periosteum. Osteomyelitis is a bone infection involving the marrow space. They can occur together but are not interchangeable terms.
Does a periosteal reaction prove bacterial infection?
No. It describes the periosteum responding to a stimulus. Several causes are possible, so the finding needs to be assessed in context.
Can it be recognised from a photograph alone?
No. A photograph cannot reliably establish which deeper tissues are involved. Examination is needed; further investigations depend on the findings.
At the practice
For the appointment
You can bring this question to your appointment:
Is the periosteum involved, and what explains the findings?
For new symptoms, contact a dental practice promptly. Emergency warning signs require immediate help.
Contact the practice · 0221 669 401 80Telephone contactLearning layer for training & practiceUnderstand terminology and deepen knowledge
- Periosteum
- Tissue covering the outer surface of bone.
- Periosteal reaction
- An imaging finding showing a periosteal response, often with new bone formation.
- Subperiosteal
- Located beneath the periosteum.
Make the distinction
Periostitis is an inflammatory interpretation; periosteal reaction is a descriptive imaging term. The latter does not automatically establish infection.
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.