Periodontal maintenance, explained

What periodontal maintenance actually is

After a patient has been treated for periodontitis (non-surgically or surgically), the disease is controlled but not cured — the bacteria that drove the original disease are still in the mouth, and without ongoing intervention they re-form biofilms and the disease can recur. Periodontal maintenance — also called supportive periodontal therapy (SPT) — is the structured programme that keeps the disease controlled.

The standard maintenance visit, performed every 3 to 4 months, includes:

1. Re-charting: re-measuring pocket depths, recession, and bleeding indices at every tooth.
2. Subgingival debridement: removing the early calculus and biofilm that has reformed below the gum line since the last visit.
3. Polishing: removing any surface stain and supragingival plaque.
4. Oral hygiene reinforcement: refreshing technique on areas that the patient is missing, sometimes introducing new aids if anatomy or dexterity has changed.
5. Risk-factor review: smoking status, diabetic control, any new medications.
6. Early detection: any site that has started bleeding again or has deepened is flagged and either addressed at the maintenance visit or scheduled for further attention.

The 2020 EFP S3 clinical practice guideline includes the criteria and recommended cadence for periodontal maintenance.¹

How is it different from a routine cleaning?

A routine cleaning at a general dental practice is typically:

• Performed by a general dental hygienist.
• Focused on supragingival calculus removal (above the gum line).
• 30–45 minutes per visit.
• Every 6 months (the standard recall interval for low-risk patients).
• Not preceded by pocket re-charting.
• Priced as a routine cleaning.

A periodontal maintenance visit is:

• Performed by a periodontal hygienist (specifically trained for sub-gingival work) or a periodontist.
• Focused on subgingival debridement at the depths the patient's specific pockets require.
• 45–60 minutes per visit.
• Every 3 to 4 months (sometimes longer if disease has been stable for years; sometimes shorter for high-risk patients).
• Preceded by full pocket re-charting.
• Priced as a specialist visit.

The differences are clinically substantive, not just procedural. A general-practice hygienist scaling supragingivally on a patient with active subgingival periodontitis is not addressing the disease — and that mismatch is a common reason for recurrence after specialist treatment.

Why every 3 to 4 months?

The biological basis: a treated periodontitis patient who is brushing well still cannot reach all the subgingival surfaces at home. Bacterial biofilm reforms below the gum line within weeks of cleaning, and in susceptible patients it can drive recurrent inflammation. Removing it before that happens is what keeps the patient stable — 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 professional mechanical plaque removal performed on a regular long-term basis limits tooth loss and attachment loss in treated periodontitis patients.³ The exact recall interval is not fixed: it is set by individual risk, with a 2-to-4-month interval considered reasonable for moderate-to-advanced cases (Trombelli 2020, Periodontology 2000).⁴

Some patients, particularly those whose disease has been stable for many years and who are low-risk for other reasons, can extend the interval to every 4 to 6 months under specialist guidance. Some patients (smokers, poorly-controlled diabetics, patients with aggressive disease history) need every 3 months indefinitely.

What does the published evidence show?

The most directly relevant figure for treated periodontitis comes from a 2015 systematic review and meta-analysis: patients who complied regularly with supportive periodontal therapy lost teeth at roughly half the rate of erratic attenders (risk ratio 0.56, 95% CI 0.38–0.82) (Lee et al. 2015, Journal of Dental Research).⁵ Compliance with maintenance, in other words, is one of the decisive factors in whether treated periodontitis stays controlled.

The longest-running supporting evidence is a primary-prevention study. Axelsson and colleagues followed a general adult Swedish population on a structured professional plaque-control programme — recall every two months in the early years, then individualised — and reported very high tooth retention and stable periodontal attachment over 30 years.² That cohort was unusual (well-motivated patients in a structured Scandinavian healthcare programme), so the absolute numbers do not generalise to all populations, but the direction of the effect is consistent: long-term structured professional cleaning plus recall preserves teeth.

The honest framing: maintenance is not a "nice to have". It is the work that determines whether treated periodontitis stays controlled or returns.

What does periodontal maintenance cost in South Africa?

A periodontal maintenance visit is set by each practice — South African specialist dentistry has no statutory tariff, and medical schemes publish procedure codes, not prices. The fee depends on the time the visit takes and the complexity of the patient's case, and is priced as a specialist visit.

How a medical scheme contributes is harder to predict than for a general consultation. Most schemes cover a routine scale-and-polish (codes 8155/8159) as a limited dental benefit — typically about twice a year — which does not match a quarterly periodontal-maintenance cadence. Enhanced periodontal cover usually has to be applied for through a scheme's dedicated periodontal programme (for example the GEMS Periodontal Programme).⁶ Because this practice is not contracted in to medical schemes, there is usually a co-payment, and the gap can be larger on a four-visits-a-year schedule. We can give you the relevant tariff codes before treatment so you can confirm your own benefit with your scheme.

A patient on quarterly maintenance for life is paying for four specialist visits per year. That is not trivial, and we are transparent about it. The implicit alternative — losing teeth to recurrent periodontitis and replacing them with implants — is substantially more expensive.

What happens if you skip maintenance?

The risk profile rises as the interval since the last visit extends:

• Under 6 months: minimal additional risk for most low-to-moderate-risk patients.
• 6–12 months: subgingival biofilm and early calculus that the hygienist can no longer remove with routine instrumentation; bleeding scores rise.
• Over 12 months: detectable recurrence in susceptible sites; sometimes a full re-treatment course is needed to re-stabilise.

If you have missed maintenance visits, the right move is to come back rather than wait further. The cost of a re-evaluation and one or two additional visits to catch up is much lower than the cost of re-treating recurrent active disease.

Linking the L3

See what is periodontal maintenance and how is it different from a regular cleaning? for a deeper dive into the differences and what to expect from each visit.

This pillar is general educational content. The right maintenance cadence and protocol for your specific case is determined at consultation by a registered specialist.