← All explanationsSubgingival instrumentation

What happens during cleaning below the gum line?

Subgingival instrumentation removes bacterial deposits and hard accumulations from accessible root surfaces below the gum. It is a treatment step for an appropriate periodontal diagnosis. The aim is inflammation control, not a permanently germ-free mouth.

For training & practice ↓

Teaching model of an instrument at a root surface below the gum margin. — Simplified cutaway model · not a treatment sequence

01 / 03

Disrupt accessible deposits

Fine hand and/or powered sonic or ultrasonic instruments are adapted to the root. Access determines the technique and instrument.

02 / 03

Place it within a plan

Preparation includes tailored oral hygiene and attention to risk factors. Local anaesthesia may improve comfort.

03 / 03

Review the response

After healing, pockets and signs of inflammation are reassessed. Further treatment and supportive maintenance depend on the response.

Watch the short explanation ↓

At a glance

Who is it for?

Appropriately diagnosed periodontal conditions.

How is it performed?

Mechanically with suitable instruments and anaesthesia when needed.

What follows?

Review and an individual maintenance plan.

Knowledge in motion

Explained in 36 seconds.

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

Landscape film (MP4) · Portrait film (MP4)

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

Disrupt accessible deposits
Fine hand and/or powered sonic or ultrasonic instruments are adapted to the root. Access determines the technique and instrument.
Place it within a plan
Preparation includes tailored oral hygiene and attention to risk factors. Local anaesthesia may improve comfort.
Review the response
After healing, pockets and signs of inflammation are reassessed. Further treatment and supportive maintenance depend on the response.

Often confused

Subgingival versus supragingival

Subgingival means below the gum margin; supragingival means above it. Location alone does not describe the whole treatment plan.

Quick answers

Is this the same as a routine professional clean?

No. Targeted treatment of periodontal pockets is different from a general professional cleaning.

Are antibiotics always necessary?

No. They are not a routine addition for every patient. Their indication is considered separately.

Can teeth feel more sensitive afterwards?

Temporary sensitivity or more visible spaces can occur, for example as swollen tissue settles. Symptoms should be reviewed.

At the practice

For a personal discussion

Editorially suggested question to discuss with Dr Niusha Barahmand Pour:

Which sites will be treated, and what will be reassessed afterwards?

A planned periodontal treatment step can be explained before it begins.

Discuss periodontal treatmentAppointment selection at Doctolib

Meet Dr. Niusha Barahmand Pour ↗

Learning layer for training & practiceUnderstand terminology and deepen knowledge

Instrumentation: Targeted mechanical treatment using instruments.
Subgingival calculus: Hard deposit on a root below the gum.
Reevaluation: Repeat assessment after a treatment phase.

Make the distinction

Subgingival means below the gum margin; supragingival means above it. Location alone does not describe the whole treatment plan.

Knowledge questionWhy is reevaluation needed?

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

Because every result is guaranteed.
To assess tissue response and further needs.
Only to select tooth colour.

View answer

To assess tissue response and further needs.

The next steps depend on the reviewed findings.

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.