General dentistry · Hygiene
Ultrasonic scaling: what the evidence actually shows
Ultrasonic scaling is offered almost everywhere as universal prevention. The evidence is more nuanced: the benefit depends on whether you have periodontitis or attend regularly with healthy gums.
The short answer
In regularly attending adults without severe periodontitis, a Cochrane review of 2 trials with 1,711 participants found high-certainty evidence that routine scale and polish makes little or no difference to gingivitis or probing depths over 2 to 3 years. In patients who do have periodontitis, subgingival instrumentation reduces pocket depth by 1.4 mm.
Key points
- In regularly attending adults without severe periodontitis, a Cochrane review of 2 trials with 1,711 participants found high-certainty evidence of little or no difference from routine scaling for gingivitis, probing depths and quality of life over 2 to 3 years.
- In patients with periodontitis, subgingival instrumentation produced a weighted pocket depth reduction of 1.4 mm at 6 to 8 months, with an estimated 74% of pockets closing.
- No significant difference has been found between hand instruments and sonic or ultrasonic instruments.
- Ultrasonic scaling removes calculus and plaque but does not whiten teeth and does not replace home care.
- Scaling is priced at 70 EUR on the published price list.
What ultrasonic scaling is
An ultrasonic scaler works with a tip that vibrates at high frequency and is cooled by a water spray. The vibration breaks the bond between calculus and the tooth surface, while the water washes away the released particles and cools the tooth. The instrument does not cut or grind enamel; it disrupts mineralised deposits.
The distinction that matters most is between supragingival and subgingival cleaning. Supragingival scaling removes visible calculus and staining above the gum margin. Subgingival instrumentation works inside the pocket, along the root surface, and forms the core of periodontitis treatment.
In conversation both are called the same thing, yet they have different aims, different durations and different evidence behind them. Much of the confusion about how often cleaning is needed comes from exactly that. Our service page covers the practical side of dental hygiene in Varna.
What the evidence shows for healthy gums
For adults who attend the dentist regularly and do not have severe periodontitis, the picture is more modest than it is usually presented. A Cochrane review of 2 trials with 1,711 participants found high-certainty evidence that routine scale and polish makes little or no difference to gingivitis, probing depths or oral-health-related quality of life over 2 to 3 years.
The same review recorded only a small reduction in the amount of calculus, of unclear clinical importance. In other words the calculus is removed, but for this group that does not translate into measurably better gum health in the medium term.
That is an inconvenient result for advertising and a useful result for patients. It does not mean cleaning is pointless; it means that for a regular attender with healthy gums, no one should promise an effect the trials did not show.
What the evidence shows in periodontitis
The other half of the picture matters just as much. In patients who genuinely have periodontitis, mechanical subgingival instrumentation is efficacious. The systematic review prepared for the European Federation of Periodontology S3-level guideline reported a weighted pocket depth reduction of 1.4 mm (95% CI 1.0 to 1.7 mm) at 6 to 8 months, with an estimated 74% of pockets closing.
That is a substantial change and it is the foundation of non-surgical periodontal therapy. Here cleaning is not a freshening-up procedure but treatment with a defined goal: reducing the bacterial load on the root surface, reducing inflammation and stabilising attachment.
The first question before any cleaning is therefore not how often, but what state the gums are in. Assessment includes pocket measurements and, where indicated, radiographs. If periodontitis is found, treatment is planned as gum disease treatment rather than as a one-off hygiene appointment.
Hand instruments or ultrasonic
This question comes up often and the evidence answers it clearly: no significant difference has been found between hand instruments and sonic or ultrasonic instruments in terms of outcome. The same review also found no significant difference between quadrant-wise delivery and full-mouth delivery in a single visit.
The practical consequence is that instrument choice is a matter of access, comfort and clinical judgement rather than superiority. In most appointments a combination is used: ultrasonic for bulkier deposits, hand curettes for fine finishing and for sites with restricted access.
If a particular technology is presented anywhere as the decisive advantage, that is a reason for a question rather than for confidence. The difference in outcome comes from the diagnosis, the thoroughness and the maintenance that follows.
How the appointment goes and what it feels like
The appointment starts with an examination and assessment of the gums. Calculus is then removed with the ultrasonic scaler, hand instrumentation is added where needed, and the surfaces are polished. Where sensitivity is marked, or for subgingival work, local anaesthesia can be used, and this is discussed beforehand.
The sensation is mainly vibration, water and sometimes sensitivity, particularly around exposed necks of teeth and inflamed gums. Slight bleeding during the appointment where the gums are inflamed is expected and usually settles over the following days if home care is adequate.
Afterwards it is normal for teeth to be temporarily more sensitive to cold for a few days and for the gums to feel tender. If the deposits were bulky, you may notice spaces between teeth that were previously filled by calculus. That is an existing situation being revealed, not a consequence of the cleaning.
What scaling does not do
Scaling does not whiten teeth. It removes external staining from coffee, tea and tobacco and returns the tooth to its own colour, but it does not change the colour of the enamel itself. Changing the shade is a separate procedure with separate indications.
It does not by itself treat advanced periodontitis, it does not rebuild bone that has already been lost, and it does not replace home care. Between appointments the result is maintained with a brush, interdental cleaning and the technique demonstrated in the surgery.
Finally, cleaning is not indicated at the same frequency for everyone. In severe periodontitis, longer intervals carry risk; with healthy gums and good hygiene, shorter intervals have no demonstrated additional benefit.
Cost and how frequency is decided
Scaling is 70 EUR on the published price list. An examination with diagnostics is 25 EUR. If the assessment finds periodontitis, treatment is planned separately and priced by extent; see our prices page.
Frequency is set by risk rather than by the calendar: gum condition, pocket depths, smoking, diabetes, a tendency to rapid calculus formation, the presence of implants, prosthetic work and orthodontic appliances, and the quality of home care.
The sensible approach is to assess the starting point, then set an individual interval and review it. If you are not sure which category you fall into, start with an examination. You can book an appointment and the first consultation costs nothing.
| Group | What was studied | Result |
|---|---|---|
| Adults without severe periodontitis attending regularly | Cochrane review, 2 trials, 1,711 participants, 2-3 years | Little or no difference in gingivitis, probing depths or quality of life; high-certainty evidence |
| Same group, amount of calculus | Same review | Small reduction in calculus of unclear clinical importance |
| Patients with periodontitis | Systematic review for the EFP S3-level guideline, 6-8 months | Pocket depth reduced by 1.4 mm, an estimated 74% of pockets closing |
| Hand versus ultrasonic instruments | Same systematic review | No significant difference in outcome |
The Club awaits you
At an examination we measure the condition of your gums and tell you honestly whether you need treatment or maintenance. Tel. +359 896 121 314.
What the evidence shows
1.4 mm
pocket depth reduction after non-surgical therapy
Systematic review commissioned for the European Federation of Periodontology S3-level clinical practice guideline: subgingival instrumentation produced a weighted pocket depth reduction of 1.4 mm (95% CI 1.0–1.7 mm) at 6–8 months, with an estimated 74% of pockets closing.
Sources
Suvan J, et al. Subgingival instrumentation for treatment of periodontitis: a systematic review. J Clin Periodontol 2020;47(S22):155–175. (opens in a new window) · Sanz M, et al. Treatment of stage I–III periodontitis — the EFP S3 level clinical practice guideline. J Clin Periodontol 2020;47(S22):4–60. (opens in a new window)
Frequently asked questions
Frequently asked questions
Performed correctly, the procedure acts on mineralised deposits rather than on enamel and is cooled with water. Excessive pressure and unsuitable settings can traumatise the surface, so technique matters. Where root surfaces are exposed or restorations are present, appropriate tips and gentler settings are chosen, which is judged at the examination.
Bleeding usually means the gums were already inflamed rather than that the procedure injured them. Healthy gum tissue rarely bleeds. Once plaque and calculus are removed, inflammation settles over days to weeks provided home care is adequate. If bleeding persists after that, an assessment for periodontitis is needed rather than more frequent cleaning.
They will look cleaner and often visibly lighter, because external staining from coffee, tea, red wine and tobacco is removed. That is a return to the tooth own colour rather than whitening. Changing the shade of the enamel itself requires a separate procedure with separate indications and is discussed after an examination.
The interval depends on risk rather than on a general rule. Where periodontitis has been diagnosed, maintenance visits are more frequent and form part of treatment. With healthy gums, good hygiene and regular check-ups, the evidence does not show benefit from a shorter schedule. The sensible approach is assessment, an individual interval and periodic review.
Most people feel vibration and water, with some discomfort where the necks of teeth are sensitive or the gums are inflamed. For subgingival work and for marked sensitivity, local anaesthesia can be used and is discussed before starting. Say so if the sensation is unpleasant: settings, tip and pace are adjusted to what you tolerate.
The clinic holds a national health fund contract, but the scope and conditions depend on the specific activity and on your insurance status rather than on preference. We clarify your case in advance so that you know what you are paying for. On the published price list, scaling is 70 EUR.
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