← All explanationsResin infiltration

How can an early decay lesion be infiltrated?

Resin infiltration introduces a low-viscosity resin into the pores of a suitable early caries lesion and hardens it. The aim is to limit progression. An appropriate, non-cavitated surface is required; prevention and follow-up remain important.

For dental trainees & teams
SMILE meets DESIGN
Medical teaching illustration: An early changeAI-generated
Light-coloured enamel area in an educational illustration · the image cannot establish its cause
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An early change

Early decay can remove minerals before a visible hole forms. Not every such lesion needs infiltration.

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Sealing the pores

After careful preparation, thin resin enters the lesion and is hardened. This forms a barrier inside the altered enamel.

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Not for every cavity

An open cavity or deeper damage may need other care. Fluoride toothpaste and monitoring remain part of management.

Watch the short film Download infographic (German)

At a glance

What is the aim?

Limit progression of a selected early caries lesion.

When might it fit?

For suitable non-cavitated lesions after dental assessment.

What remains necessary?

Prevention and review; it is not a general protective coating.

Knowledge in motion

Explained in 36 seconds.

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

Short film (German): How can an early decay lesion be infiltrated?

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

Often confused

Infiltration or sealant?

Infiltration acts within a porous lesion. A sealant forms a protective layer over a suitable surface, such as a fissure.

Quick answers
Is it a filling without drilling?

It is a microinvasive option for selected lesions. It does not replace a filling for every defect; the surface is deliberately prepared.

Will white spots disappear?

Some suitable white spots may become less noticeable. Causes differ, and colour matching is not guaranteed.

Does it prevent all further decay?

No. Personal caries risk and other tooth surfaces still need attention.

At the practice

For your consultation

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

What type of change is present, and which approach sensibly preserves tooth tissue?

At the practice, findings, personal wishes and possible next steps are discussed through a consultation and examination.

An early lesion can be understood better when its surface and progress are assessed.

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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.

Non-cavitated
The surface has not collapsed into a cavity.
Lesion body
The altered hard tissue beneath the surface.
Microinvasive
Involving a very limited intervention in the tooth surface, not no change at all.

Know the difference

White spot describes appearance first. Cause, depth and surface integrity must be assessed before infiltration.

Knowledge questionWhich situation may suit infiltration?

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

  1. Every deep defect.
  2. A selected early lesion with an intact surface.
  3. Every discolouration without examination.
Show answer and explanation

A selected early lesion with an intact surface.

Selecting suitable lesions matters; a white mark alone is not enough.

Sources for further learning
Related terms
Tooth decay White spots Fluoride
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.