← All explanationsMolar-incisor hypomineralisation (MIH)

Why can newly erupted molars be fragile?

MIH affects enamel quality in one or more first permanent molars; incisors may also be involved. In German, these teeth are often called 'Kreidezähne'. They can be sensitive and more prone to breakdown.

For dental trainees & teams

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Enamel with different quality

In MIH, enamel develops with altered mineralisation. Affected areas can look white, cream-coloured or yellow-brown.

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Not caused by poor brushing

This developmental condition is not caused by inadequate cleaning. Sensitivity may, however, make oral care more difficult.

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Recognise early and protect appropriately

Support depends on severity. Regular checks help address sensitivity and possible enamel breakdown in good time.

Watch the short film Download infographic (German)

At a glance

What is MIH?

A developmental enamel quality disturbance affecting typical permanent molars and sometimes incisors.

How does it develop?

During tooth development; a single cause does not reliably explain all cases.

Why identify it early?

Affected teeth may be sensitive and more prone to losing enamel.

Knowledge in motion

Explained in 36 seconds.

Three steps. Straight to the point.
Explanations are also shown on screen.

Short film (German): Why can newly erupted molars be fragile?

Open the short film directly: Landscape film (MP4, German) · Portrait film (MP4, German)

Silent film in German · English explanations in the three views above

Often confused

MIH or decay?

MIH is a disturbance of enamel development. Decay results from a recurring imbalance between mineral loss and repair at tooth surfaces.

Quick answers

Is every white spot MIH?

No. Pale enamel changes have different causes. The characteristic pattern of affected teeth matters for MIH.

Can an MIH tooth also develop decay?

Yes. MIH and decay are different processes but can occur in the same tooth.

Has a single cause been proved?

Development of MIH is complex. One cause does not reliably explain all affected cases.

At the practice

For your consultation

A question to discuss with Dr. med. dent. Niusha Barahmand Pour:

Does the enamel change fit MIH, and what care would be appropriate?

Specific treatment is selected only after the circumstances have been assessed.

Unusual enamel changes can prompt a discussion of suitable assessment or care.

Ask about assessmentArrange an appointment with the practice

Meet Dr. med. dent. Niusha Barahmand Pour

Learning for dental trainees & teamsUnderstand clinical terms and build your knowledge

Build on the simple explanation with clinical terms, key distinctions and a knowledge question.

MIH: Molar-incisor hypomineralisation: an enamel quality disturbance affecting typical permanent teeth.
Hypomineralisation: Disturbed mineral quality during tooth development.
Post-eruptive breakdown: Loss of tissue after an already weakened tooth has erupted.

Know the difference

MIH affects enamel quality. Enamel hypoplasia, in contrast, means a reduced amount of enamel.

Knowledge questionWhich statement about MIH is correct?

This question supports learning. It does not assess personal symptoms.

It is caused exclusively by poor brushing after eruption.
Every white spot on an incisor proves MIH.
It is developmental and can also increase susceptibility to decay.

Show answer and explanation

It is developmental and can also increase susceptibility to decay.

MIH arises during development; diagnosis considers the pattern and other features.

Sources for further learning

Sources and context

Editorial research: 23 October 2026. This explanation covers general principles and does not replace a personal examination. Suitable treatment is discussed following individual assessment.