The side-by-side comparison
| Routine cleaning | Periodontal maintenance | |
|---|---|---|
| Who | General-practice dental hygienist | Periodontal hygienist or periodontist |
| What is removed | Supragingival calculus (above gum line) and stain | Subgingival calculus (below gum line) and biofilm at the depths your pockets require |
| Pocket charting | Usually not done | Done at every visit |
| Bleeding scores recorded | Sometimes | Always |
| Frequency | Every 6 months (low-risk) | Every 3–4 months (most patients with treated periodontitis) |
| Time per visit | 30–45 minutes | 45–60 minutes |
| Purpose | Prevention in patients without history of periodontitis | Secondary prevention in patients with treated periodontitis |
| Evidence base | Standard preventive care | EFP S3 guideline-recommended protocol1 |
Why a periodontal hygienist, not a general-practice one
This is the question patients ask most often, and the honest answer is that a periodontal hygienist has additional training and clinical experience specifically in subgingival instrumentation.
A general-practice hygienist's training and routine work is on patients without significant periodontitis. The instrumentation skill required to remove early subgingival calculus at 5–6 mm depths, around root furcations, on roots that have been previously instrumented, is a higher level of difficulty. Periodontal hygienists work daily on these surfaces; they are calibrated to the specific instrumentation needs.
This is not a criticism of general-practice hygienists — it is a difference in scope. A periodontitis patient on quarterly maintenance is on a clinical pathway that is the periodontal hygienist's specific area. Mixing routine cleanings into that pathway (e.g. alternating one quarterly periodontal maintenance with one 6-monthly general cleaning) typically delivers worse outcomes than consistent quarterly periodontal maintenance.
Why 3 to 4 months and not 6 months?
The biological basis: a treated periodontitis patient who is brushing well still cannot reach every subgingival surface at home. Bacterial biofilm reforms below the gum line within weeks of cleaning, and in susceptible patients it can drive recurrent inflammation — which is why most treated periodontitis patients are seen every 3 to 4 months rather than every 6.
Trombelli and colleagues' systematic review found that long-term professional mechanical plaque removal limits tooth loss and attachment loss in treated periodontitis patients.2 The review did not single out a fixed interval; the exact recall is individualised, with a 2-to-4-month interval considered reasonable for moderate-to-advanced cases (Trombelli 2020, Periodontology 2000).3 In practice that means some long-stable, low-risk patients can extend to 4 or even 6 months, while some high-risk patients (smokers, poorly-controlled diabetics, patients with aggressive disease) need every 3 months indefinitely. The cadence is reviewed periodically and adjusted based on how the patient is doing.
The case for not slipping back to 6-monthly recall is concrete: in a 2015 meta-analysis, treated periodontitis patients who attended supportive therapy regularly had roughly half the tooth-loss risk of irregular attenders (risk ratio 0.56, 95% CI 0.38–0.82) (Lee et al. 2015, Journal of Dental Research).4
What happens at a maintenance visit
A typical 45–60 minute visit:
- Update of medical history — new medications, new conditions, new symptoms.
- Pocket re-charting — depths and bleeding scores at every tooth, recorded for comparison with previous visits.
- Detection of new problems — caries, mobility, restorations needing attention.
- Subgingival debridement — the hygienist works through the dentition with ultrasonic and hand instruments, removing biofilm and early calculus at the depths each site requires. Local anaesthetic is used where comfort requires.
- Polishing — supragingival stain removal.
- Oral hygiene reinforcement — refreshing the patient's home-care technique, particularly on any sites where bleeding or technique is slipping.
- Communication with the periodontist — any site that has deepened, become more inflamed, or otherwise changed since the previous visit is flagged.
- Recall scheduling for the next maintenance visit.
The patient leaves with a brief written summary of what was found, what was done, and any specific issues to attend to at home.
How long do you need to stay on maintenance?
The honest answer: indefinitely. A patient with treated periodontitis remains susceptible to the disease for life. The maintenance programme is what manages that susceptibility.
In practice:
- The first 1–2 years post-treatment are the highest-risk period; quarterly maintenance is standard.
- For patients who remain stable for 3+ years, the cadence may be extended in selected cases.
- For higher-risk patients (smokers, diabetics, aggressive-disease history), quarterly cadence is maintained.
Discharging a treated periodontitis patient from periodontal maintenance back to standard general-practice 6-monthly cleanings is not generally indicated — when it happens, recurrence rates rise.
When maintenance is not enough
Sometimes a site that has been stable starts to recur. The maintenance visit detects it (bleeding score has risen at that site; pocket has deepened by 1 mm). The next step is one of:
- An additional non-surgical session focused on that site.
- Adjunctive antimicrobials (locally-delivered or systemic, depending on the situation).
- Surgical re-entry for sites that do not respond to the above.
Maintenance is the surveillance and intervention pathway that catches recurrence early; what makes it work is that recurrence is detected and dealt with at the millimetre, not the centimetre.
What you can do between maintenance visits
Three things matter:
- Brush twice daily for two minutes, with a soft brush, using the technique the hygienist showed you.
- Clean between the teeth every day with interdental brushes (sized to your gaps) or floss where the gap does not fit a brush.
- Watch for changes — new bleeding, new sensitivity, new looseness — and tell the practice rather than waiting for the next scheduled visit.
Common questions
Is periodontal maintenance the same as a deep cleaning?
No. A deep cleaning (scaling and root planing) is part of the active treatment that brings periodontitis under control. Periodontal maintenance is the ongoing care that comes afterwards — full pocket re-charting plus subgingival cleaning every 3 to 4 months — to keep the disease from returning once it is controlled.
How often do I need periodontal maintenance?
Most patients with treated periodontitis are seen every 3 to 4 months. The exact interval is individualised by risk, with a 2-to-4-month range considered reasonable for moderate-to-advanced cases (Trombelli 2020, Periodontology 2000). Long-stable, low-risk patients can sometimes extend it; higher-risk patients stay on a 3-month cadence.
Can I go back to my regular dentist for cleanings after gum treatment?
Routine 6-monthly cleanings on their own are not generally enough once you have had periodontitis. In a 2015 meta-analysis, regular maintenance attenders had about half the tooth-loss risk of irregular ones (risk ratio 0.56, Lee et al. 2015). Your general dentist and the practice can share your care, but the maintenance schedule should not lapse.
Does periodontal maintenance hurt?
For most patients it is comfortable. The hygienist works with ultrasonic and hand instruments below the gum line, and local anaesthetic is used where a site is sensitive or pockets are deeper. Any discomfort is usually mild and short-lived; tell the practice beforehand if you have had pain at previous visits.
This article is general educational content. The right maintenance protocol for your specific case is determined at consultation by a registered specialist.