← All explanationsDentofacial discrepancy (dysgnathia)

What is meant by a jaw or dentofacial discrepancy?

Dysgnathia is an umbrella term for discrepancies in tooth or jaw positions and how they fit together. Jaw size, position and the relationship between the dental arches may be involved. Function, symptoms, growth and individual findings determine whether and how treatment is considered.

For training & practice ↓
SMILE meets DESIGN
Photorealistic anatomical orientation model of the upper jaw, lower jaw and teeth, with no deformity depicted. Focus: Upper jaw base.AI-generated
Anatomical orientation: distinguishing tooth positions and jaw bases. The model shows no diagnosed jaw deformity.
01 / 03

Separate teeth and jaw bases

A dental discrepancy concerns tooth position. A skeletal discrepancy concerns the jaw bases. Both may contribute.

02 / 03

Assess function

Assessment includes the bite, chewing and growth. A profile photograph alone does not establish medical treatment need.

03 / 03

Plan the appropriate pathway

Some findings can be managed orthodontically; others require consideration of combined orthodontic and surgical care. Surgery is not automatic.

At a glance

Umbrella term?

Discrepancies involving teeth and jaws.

Always treat?

Individual assessment determines this.

First step?

Dental and, when appropriate, orthodontic assessment.

Knowledge in motion

Explained in 36 seconds.

Three steps. No audio.
Each scene can also be selected manually.

Dentofacial discrepancy (dysgnathia): short film

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
  1. Separate teeth and jaw bases

    A dental discrepancy concerns tooth position. A skeletal discrepancy concerns the jaw bases. Both may contribute.

  2. Assess function

    Assessment includes the bite, chewing and growth. A profile photograph alone does not establish medical treatment need.

  3. Plan the appropriate pathway

    Some findings can be managed orthodontically; others require consideration of combined orthodontic and surgical care. Surgery is not automatic.

Often confused

Dysgnathia and TMD

Dysgnathia describes dental or jaw discrepancies. TMD concerns disorders and symptoms of the masticatory system. One term does not establish the other.

Quick answers
Does the word always mean severe disease?

No. It includes a wide range of findings and does not alone establish symptoms or treatment need.

Is surgery always necessary?

No. Surgical involvement depends on the type and extent of the discrepancy.

Does a jaw discrepancy automatically explain TMD?

No. Jaw symptoms can have several causes. A bite discrepancy alone does not establish TMD.

At the practice

For a personal discussion

Editorially suggested question to discuss with Dr Niusha Barahmand Pour:

Does the discrepancy involve the teeth, the jaw bases or both?

Questions about the bite or jaw positions can be assessed and referred for specialist review where needed.

Discuss jaw relationshipsAppointment selection at Doctolib
Meet Dr. Niusha Barahmand Pour ↗
Learning layer for training & practiceUnderstand terminology and deepen knowledge
Dentoalveolar
Relating to teeth and their supporting alveolar bone.
Skeletal
Relating to the bony jaw bases.
Orthognathic surgery
Surgical correction of selected jaw discrepancies.

Make the distinction

Dysgnathia describes dental or jaw discrepancies. TMD concerns disorders and symptoms of the masticatory system. One term does not establish the other.

Knowledge questionWhich statement is correct?

For learning, not for assessing personal symptoms. Your answer is not stored or sent.

  1. Tooth positions and jaw bases need to be distinguished.
  2. Every discrepancy needs an operation.
  3. A profile photograph replaces an examination.
View answer

Tooth positions and jaw bases need to be distinguished.

Planning depends on several individual findings.

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.