← All explanationsFissure caries

Why do chewing-surface grooves matter?

Fissure caries starts around the pits and grooves of a chewing surface, where biofilm can remain. A dark groove alone does not prove decay needing treatment; the surface and surrounding enamel need assessment.

For training & practice ↓

Chewing-surface model with a stained central groove; colour alone does not establish lesion activity or depth. — Groove on a teaching model · colour alone is not diagnostic

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Find the groove

Fissures are part of normal chewing-surface anatomy. Their depth and accessibility vary.

02 / 03

Assess discolouration

The clean, dry tooth is examined. Additional methods may help when indicated; a photograph alone is insufficient.

03 / 03

Protect or restore

Prevention, sealing or a filling may be appropriate depending on the findings. Sealed surfaces still need reviews.

Watch the short explanation ↓

At a glance

Where?

In chewing-surface grooves.

Only in children?

No.

What to assess?

Surface integrity, activity and protection.

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

Find the groove
Fissures are part of normal chewing-surface anatomy. Their depth and accessibility vary.
Assess discolouration
The clean, dry tooth is examined. Additional methods may help when indicated; a photograph alone is insufficient.
Protect or restore
Prevention, sealing or a filling may be appropriate depending on the findings. Sealed surfaces still need reviews.

Often confused

Fissure versus decay

A fissure is a normal groove; a carious change there is fissure caries.

Quick answers

Is every black line a cavity?

No. Colour alone does not show lesion activity or depth.

What does a sealant do?

A thin material covers suitable grooves. This can aid cleaning and reduce decay risk at that site.

Should I scrape the groove myself?

No. Sharp objects can damage the surface. Have a concerning area examined.

At the practice

For a personal discussion

Editorially suggested question to discuss with Dr Niusha Barahmand Pour:

Is this groove only stained, or does it need treatment?

A concerning chewing surface can be assessed during a dental examination.

Have chewing surfaces assessedAppointment selection at Doctolib

Meet Dr. Niusha Barahmand Pour ↗

Learning layer for training & practiceUnderstand terminology and deepen knowledge

Occlusal: On the chewing surface.
Fissure: A chewing-surface groove.
Sealant: Thin material covering suitable pits and grooves.

Make the distinction

A fissure is a normal groove; a carious change there is fissure caries.

Knowledge questionWhat does a dark groove prove?

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

No caries diagnosis on its own.
Always deep decay.
Always a dead pulp.

View answer

No caries diagnosis on its own.

The surface and other findings must be considered together.

Sources and context

Editorial research: 2026-11-02. General information, not an individual diagnosis or treatment recommendation. Teaching illustrations are simplified and do not depict a patient case.