Last updated: October 2026. Written by the Dentists Closeby editorial team using the British Society of Periodontology, SDCEP, NHS.uk and NHSBSA. See the numbered Sources list at the end for every figure quoted.
TL;DR A BPE (Basic Periodontal Examination) score rates your gum health in each part of your mouth from 0 (healthy) to 4 (the deepest gum pockets). It is a quick screening check, not a diagnosis. Codes 0, 1 and 2 often improve with better cleaning; codes 3 and 4 need closer examination and treatment, usually on NHS Band 2.
Your dentist runs a small probe around your gums, then calls out a number. For many people that number is the only thing they remember from the appointment, and there is almost no plain-English explanation of what it means. This guide decodes the BPE score so you know whether a 3 is something to worry about and what your dentist is likely to do next.
Around two in five adults in England (41%) have gum pockets deeper than 3.5mm, according to the Adult Oral Health Survey 2023 published in December 2025 [1]. The BPE is the routine check that picks this up early, often before you notice any symptom beyond a little bleeding when you brush.
What is a BPE score?
A BPE score is a gum-health rating from a quick screening check your dentist does at routine examinations. BPE stands for Basic Periodontal Examination, a screening tool first developed by the British Society of Periodontology (BSP) in 1986. The BSP's current guidance describes it as "a simple and rapid screening tool that is used to indicate the level of further examination needed and provide basic guidance on treatment needed" [2].
The single most important thing to understand is that the BPE is for screening only. The BSP is explicit that it "should not be used for diagnosis" [2]. A high score tells your dentist that more investigation is needed, not that a diagnosis has been made.
To record it, your dentist divides your mouth into six areas called sextants (upper right, upper front, upper left, and the same three along the bottom) and notes the single worst reading in each one [2]. So your score is not an average. One deep pocket in one area sets the score for that whole sextant.
The probe used is a World Health Organisation BPE probe. It has a tiny 0.5mm ball on the end and a black band running from 3.5mm to 5.5mm, and it is used with a very light touch of 20 to 25 grams [2]. SDCEP, the Scottish Dental Clinical Effectiveness Programme, likens that pressure to "the pressure needed to blanch a fingernail" [3]. The dentist gently walks the probe around each tooth and watches how far the black band disappears into the gum.
The BPE scores explained: 0 to 4
Here is what each code means, using the British Society of Periodontology's own wording [2].
| Code | What the probe finds | Plain English |
|---|---|---|
| 0 | Pockets under 3.5mm, no calculus or overhangs, no bleeding on probing (black band fully visible) | Healthy gums. No treatment needed. |
| 1 | Pockets under 3.5mm, no calculus, but bleeding on probing (black band fully visible) | Gums bleed when checked. Early inflammation. |
| 2 | Pockets under 3.5mm, with calculus (tartar) or an overhang on a filling or crown | Tartar or a rough edge is trapping plaque. |
| 3 | Probing depth 3.5mm to 5.5mm (black band partly disappears, pocket of about 4mm to 5mm) | A moderate gum pocket. Needs closer examination. |
| 4 | Probing depth over 5.5mm (black band disappears, pocket of 6mm or more) | A deep gum pocket. The highest code. |
| * | Furcation involvement | Bone loss where a tooth's roots divide. Recorded alongside the number, e.g. 3*. |
A quick word on the asterisk, because it is widely misreported online. In the BSP's current guidance the * means furcation involvement and nothing else [2]. A furcation is the point where the roots of a back tooth split apart. If gum disease has destroyed enough bone there, the probe can pass between the roots, and your dentist records the asterisk next to the number for that sextant, such as 3* [2][3].
You may also see a dash in your notes rather than a number. A sextant has to contain at least two teeth to be scored, so a gap or a single remaining tooth is simply marked with a dash [2].
What does a BPE score of 3 mean?
A BPE score of 3 means the probe found a gum pocket of 3.5mm to 5.5mm in at least one sextant, so the black band on the probe partly disappeared. It points to a moderate pocket of roughly 4mm to 5mm [2]. It is not, on its own, a diagnosis of gum disease, because the BPE is a screening check rather than a diagnostic one [2].
For any sextant scoring 3 or 4, the BSP recommends more detailed periodontal charting, where the dentist measures six points around each tooth rather than taking one quick reading, and radiographs of the affected area [2]. The management for a code 3 is oral hygiene instruction, removal of tartar and plaque-retentive factors, and root surface debridement (a deeper clean under the gum) "if required" [2].
In practice, modern UK guidance front-loads your own cleaning before any deep cleaning. The BSP's 2025 stepwise care pathway starts with coaching on home care and risk factors, then reassesses at around three months, and only then moves to deeper cleaning in patients who have engaged with the plan [5]. The BSP is blunt about why: deep cleaning "in patients with sub-optimal plaque control is ineffective and fails" [5]. So expect your dentist to focus on your brushing and interdental cleaning first.
Is a BPE score of 4 serious?
A BPE score of 4 is the highest code and means a gum pocket deeper than 5.5mm, but it is not an automatic sentence of specialist treatment or tooth loss. The black band on the probe disappears completely, indicating a pocket of 6mm or more in at least one sextant [2].
A 4 does trigger more work. The BSP recommends a full-mouth six-point pocket chart (not just the affected sextant) and radiographs, plus oral hygiene instruction and root surface debridement [2]. The guidance then says to "assess the need for more complex treatment" and that "referral to a specialist may be indicated" [2].
The word "may" matters. The BSP's referral guidance makes clear that most cases should have initial care in general practice first, with referral considered only if that is unsuccessful or the case is genuinely complex, such as advanced disease or difficult furcation defects [4]. A single code 4 is the worst reading in one sextant, not a verdict on your whole mouth. The BSP's own patient leaflet reassures that "gum disease is completely treatable if diagnosed early enough" [7].
What your dentist does after each score
The response to your BPE score climbs in steps, following the BSP's interpretation guidance [2].
- Code 0: No periodontal treatment needed. Keep up your routine.
- Code 1: Oral hygiene instruction. The dentist or hygienist shows you where plaque is collecting.
- Code 2: As for code 1, plus removal of tartar and any plaque traps such as overhanging filling edges.
- Code 3: As for code 2, plus detailed charting of that sextant and root surface debridement if needed, usually after a home-care review.
- Code 4: Full-mouth detailed charting, root surface debridement, and an assessment of whether more complex treatment or a referral is needed.
One thing to retire from your vocabulary is "scale and polish" as the fix for gum disease. The BSP now lists it as an obsolete term, replaced by professional mechanical plaque removal and, below the gum, root surface debridement [5]. If your dentist talks about debridement, they mean a careful clean of the root surfaces inside the pocket, not a quick polish.
Can a BPE score improve?
Yes, lower BPE scores can improve, and even higher scores can be stabilised, though the pattern differs by code. Codes 1 and 2 reflect bleeding and tartar, the features of gingivitis, which the BSP and BSPD describe as "preventable and reversible" [6]. With consistent brushing, daily cleaning between the teeth and a professional clean, these scores can genuinely return towards 0.
Codes 3 and 4 are a different story. They reflect pockets left by damage that has already happened, and the BSP patient leaflet is honest about the limit: "treatment cannot replace the support your teeth have already lost" [7]. The realistic goal here is to stop the disease progressing and to stabilise and improve your gum health, not to erase the pocket entirely.
What helps at every level is the same short list. Brush twice a day with fluoride toothpaste, clean between your teeth daily with interdental brushes or floss, and attend your check-ups [10]. The BSP leaflet adds that treatment "will only work if you clean your teeth properly, twice a day, to a high standard" [7]. Do not be alarmed if your gums bleed a little more when you first improve your cleaning; the leaflet advises you to "keep cleaning" [7].
Smoking is the single biggest modifiable risk. The BSP notes that smokers "are less likely to get better after treatment" and "are more likely to have a recurrence", and its 2020 guidance lists vaping among the modifying factors too [4][7].
One technical caveat worth knowing: the BPE itself is not used to track your progress after treatment. The BSP says it "cannot be used to monitor the response to periodontal therapy" because it does not capture how individual sites change [2]. Your dentist watches progress with the detailed pocket charts instead, recording full depths at least once a year once you are in the maintenance phase [2].
How often should a BPE be done?
Every new patient should have a BPE recorded, and it is repeated at routine examinations. The BSP recommends recording it for all new patients, and at every routine examination for anyone scoring 0, 1 or 2 [2]. SDCEP echoes that it should form part of the routine examination "at initial presentation and, with a few exceptions, at recall visits" [3].
How often you attend for those check-ups is a separate decision. NHS guidance says intervals range "from 3 months to 2 years" depending on your oral health and risk, and your dentist should tell you when to come back [11].
Children are screened with a simplified version called the sBPE. It looks at six index teeth rather than the whole mouth, uses only codes 0 to 2 for ages 7 to 11, and the full range of codes for ages 12 to 17, with the adult BPE applying from 18 [6].
What gum care costs on the NHS
A gum assessment is part of your routine dental examination, so the BPE itself does not carry a separate charge. In England, a check-up sits in Band 1 at £27.90, which the NHS Business Services Authority (NHSBSA) describes as covering "an examination, diagnosis (eg X-rays), advice on how to prevent future problems, a scale and polish if needed and application of fluoride varnish" [8].
If your score leads to actual gum treatment, that moves you into Band 2. The NHSBSA is specific that periodontal treatment, "both surgical and non-surgical, including root-planing; deep scaling, irrigation of periodontal pockets, subgingival curettage is always Band 2" [9]. Here are the current England charges from 1 April 2026 [8].
| NHS band (England) | Charge | What it covers |
|---|---|---|
| Band 1 | £27.90 | Examination, X-rays, advice, scale and polish if needed, fluoride varnish |
| Band 2 | £76.60 | Everything in Band 1, plus fillings, extractions, root canal work and gum treatment |
| Band 3 | £332.10 | Everything in Bands 1 and 2, plus crowns, dentures and bridges |
You pay one charge per complete course of treatment [8]. Gum disease, though, is often managed in stages over time, and the BSP's NHS pathway anticipates more than one course of care for an established problem [5]. That means you may be asked to pay a Band 2 charge more than once across different courses, so it is worth asking your dentist how they plan to stage your treatment. We have not quoted a total here because an honest figure depends entirely on how many courses you need. Private gum-treatment fees vary by practice, so ask for a written estimate before you start.
Charges differ across the UK. In Scotland, NHS dental examinations are free for everyone, treatment is charged at 80% of the cost up to a cap of £384 per course, and under-26s receive free NHS treatment [12]. Wales moved to fixed per-package fees from April 2026, and Northern Ireland uses a percentage-of-cost model. Check NHS inform, NHS 111 Wales or nidirect for the figures where you live.
Remember too that NHS dental treatment is free for some groups, including under-18s, under-19s in full-time education, pregnant women and those who have had a baby in the past 12 months, and people receiving qualifying benefits or holding an HC2 certificate.
How to read your own BPE notes
If you can see your record, the BPE usually appears as a little grid of six boxes, one per sextant, often written at the start of your notes. A row might read 2, 3, 3* across the top and 1, 2, 4 across the bottom. Read each box as the worst finding in that area: the 4 means one sextant had a pocket over 5.5mm, and the 3* means a moderate pocket plus furcation involvement in another.
You are entitled to ask what your score means for you specifically. The BSP leaflet encourages exactly this, advising patients to "ask your dentist to explain this, in particular in relation to your own BPE score" [7]. A good practice will happily walk you through the number and show you where the problem areas are.
Frequently asked questions
What does BPE stand for?
BPE stands for Basic Periodontal Examination. It is a quick screening tool, first developed by the British Society of Periodontology in 1986, that your dentist uses to rate the health of your gums in each part of your mouth and decide whether you need any further examination or treatment [2].
What is a normal BPE score?
A normal, healthy score is 0: gum pockets under 3.5mm, no tartar or overhangs, and no bleeding when the gums are gently probed [2]. A perfect set of zeros is uncommon, though. The Adult Oral Health Survey 2023 found only 7% of dentate adults in England had no observed periodontal conditions at all [1].
What does a BPE score of 3 mean?
A score of 3 means the probe found a gum pocket of 3.5mm to 5.5mm (roughly 4mm to 5mm) in at least one sextant [2]. Your dentist will usually do detailed charting of that area, take X-rays, and focus first on improving your cleaning before any deeper cleaning under the gum [2][5].
Is a BPE score of 4 serious?
A 4 is the highest code and signals a pocket deeper than 5.5mm, so it needs fuller investigation and treatment [2]. It is not automatic that you will be referred or lose a tooth. The BSP says most cases start with initial care in general practice, with referral considered only if that does not work or the case is complex [4].
Can a BPE score improve?
Yes. Codes 1 and 2 reflect reversible gingivitis and often return towards 0 with good home cleaning and a professional clean [6]. Codes 3 and 4 can be stabilised and improved, but the BSP notes treatment "cannot replace the support your teeth have already lost", so lost bone does not grow back [7].
Does a BPE check hurt?
It should not. The probe has a tiny 0.5mm ball end and is used with a very light touch, around 20 to 25 grams, comparable to the pressure needed to blanch a fingernail [2][3]. Inflamed gums can feel tender and may bleed slightly, which is itself a finding, so tell your dentist if any area feels sore.
How often should a BPE be done?
Every new patient has a BPE recorded, and it is repeated at routine examinations for anyone scoring 0, 1 or 2 [2]. After gum treatment, your dentist monitors progress with detailed pocket charts rather than the BPE [2]. How often you attend check-ups ranges from 3 months to 2 years depending on your risk [11].
Is a BPE the same as a gum assessment on the NHS?
The BPE is the screening step inside your NHS examination, which sits in Band 1 [8]. If it leads to gum treatment, that treatment is charged in Band 2 [9]. So the check is part of a standard appointment, and only treatment that follows adds to the cost.
Looking after your gums from here
A BPE score is a snapshot, not a sentence. A 1 or a 2 is a nudge to tighten up your cleaning; a 3 or a 4 is a prompt to work with your dentist on a proper plan. The number that matters most is the one at your next visit, and that one is partly in your hands.
If you do not currently have a dentist, or you want a second opinion on your gum health, you can search for a GDC-registered dentist near you on Dentists Closeby and compare practices in your area. Finding the right practice is the first step to getting your gums back on track.
For more on what your gums are telling you, read our guides on bleeding gums when brushing, the cost of gum disease treatment and how to floss and use interdental brushes. If your score followed a routine appointment, our guides to dental check-up costs, the cost of a hygienist scale and polish and NHS dental charges and bands explain what you will pay.
Sources
- Adult Oral Health Survey 2023: Clinical oral health -- OHID/DHSC, published 9 December 2025, accessed 2026-10-02
- Basic Periodontal Examination (BPE) Guidelines -- British Society of Periodontology, published January 2019, accessed 2026-10-02
- Periodontal probing and interpretation of BPE scores -- SDCEP, accessed 2026-10-02
- Guidelines for Periodontal Patient Referral -- British Society of Periodontology, 2020, accessed 2026-10-02
- Delivering Stepwise Personalised Care for Periodontitis Patients -- British Society of Periodontology, version 2, 7 August 2025, accessed 2026-10-02
- Simplified BPE for the Under 18s (Executive Summary) -- BSP/BSPD, updated 2021, accessed 2026-10-02
- Periodontal Health for a Better Life (Patient Information Leaflet) -- British Society of Periodontology, 2017, accessed 2026-10-02
- NHS dental charges from 1 April 2026 -- NHSBSA, March 2026, accessed 2026-10-02
- Which band does periodontal treatment fall into? (KA-02041) -- NHSBSA, accessed 2026-10-02
- Gum disease -- NHS.uk, last reviewed 20 April 2026, accessed 2026-10-02
- Dental check-ups -- NHS.uk, last reviewed 1 April 2025, accessed 2026-10-02
- Receiving NHS dental treatment in Scotland -- NHS inform, last reviewed 27 July 2026, accessed 2026-10-02
