BSP Periodontal Treatment Guideline (S3): Steps 1-4 and What to Record

Periodontal disease is a frequent subject of dento-legal claims in UK general practice: the DDU reported it as the subject of about 10% of the general dental practitioner claims notified to it in 2017 (DDU, via Dentistry, 2019). Most of these allegations follow the same pattern: the disease was present, it was not diagnosed, or it was diagnosed and not treated, or it was treated and not documented. The British Society of Periodontology (BSP) provides clear guidance on how periodontal disease should be classified, managed, and recorded — yet documentation failures in perio cases remain stubbornly common.

This guide breaks down BSP periodontal guidelines into what you need to document at every stage of the perio care pathway — from initial BPE screening through to supportive periodontal therapy. If your notes cannot demonstrate that you followed a systematic, evidence-based approach to periodontal management, they will not withstand scrutiny from a GDC case examiner, dental defence expert, or court-appointed periodontist. For broader dental documentation standards, see our complete dental documentation guide.

The three BSP documents you need

1. The BSP Basic Periodontal Examination (BPE) guidance (2019). The BPE is a screening tool that tells you what level of further examination is needed. The BSP is explicit that it “should be used for screening only and should not be used for diagnosis”. It sets the minimum follow-up for each code, for example a 6-point pocket chart of the whole dentition when any sextant scores 4. Read the BSP BPE guidance.

2. The BSP implementation of the 2017 classification. The BSP’s flowchart for diagnosing periodontitis by stage, grade and current status in UK practice (Dietrich et al., British Dental Journal 2019; 226: 16–22). Read the BDJ paper.

3. The BSP UK version of the EFP S3 treatment guideline. The UK adaptation of the European Federation of Periodontology S3-level guideline for treating stage I–III periodontitis (West et al., Journal of Dentistry 2021; 106: 103562). It sets out four steps of therapy:

• Step 1 — building foundations: behaviour change for oral hygiene, risk-factor control (including smoking cessation and diabetes control), tailored oral hygiene advice and professional mechanical plaque removal.
• Step 2 — subgingival instrumentation (hand or powered), with adjunctive systemic antimicrobials only where determined by a practitioner accredited for Level 2 and 3 care. Re-evaluate after about 3 months.
• Step 3 — managing non-responding sites: re-instrumentation of moderate residual pockets, or referral for surgery.
• Step 4 — supportive periodontal care, with recall intervals tailored to the individual between 3 and 12 months.

Read the BSP UK clinical practice guidelines and treatment flowchart.

Staging, grading and BPE: where the criteria live

This page covers the treatment guideline and what to record at each step. The criteria themselves have one home each: the stage (I–IV) and grade (A–C) tables, the stability definitions and a worked example are in the periodontal staging and grading reference, and the BPE codes, the follow-up each code needs and the furcation asterisk are in the BPE scoring guide. Both follow the BSP sources listed above.

Documentation requirement: Every periodontal diagnosis in your clinical notes should follow the BSP statement: extent, stage, grade, current stability and risk factors — for example, “Generalised periodontitis, Stage III, Grade B, currently unstable, risk factors: smoker 15/day.” Records that state only “periodontitis” or use the old terminology (“chronic periodontitis”) do not meet BSP guidelines and may be criticised by an expert reviewing the case.

BPE at a glance

The Basic Periodontal Examination (BPE) is a screening tool that should be recorded at every new patient examination and every recall appointment for adult patients. It is the entry point to the entire perio pathway — and its absence from the clinical record is one of the most common findings in dento-legal cases involving undiagnosed periodontal disease.

In brief (BSP BPE guidance, January 2019): codes 0–2 mean no pocket deeper than 3.5mm (code 1 adds bleeding, code 2 calculus or overhangs), and the BPE is repeated at every routine examination. Code 3 (a pocket of about 4–5mm) calls for initial therapy, then a 6-point chart of that sextant; code 4 (6mm or more) calls for a 6-point chart of the whole dentition. Radiographs should be available for every code 3 and code 4 sextant, an asterisk (*) records furcation involvement, and the BPE is not used around implants.

Full BPE codes and actions: see our BPE scoring guide. Source: BSP Basic Periodontal Examination (BPE) guidance, January 2019.

The critical transition: The most dangerous documentation gap in periodontal care is between BPE screening and detailed assessment. A BPE of 3 or 4 that is recorded but not followed up with the appropriate level of assessment represents a failure of the care pathway — and one that expert witnesses will immediately identify. Your notes must show that when a BPE of 3 or 4 was recorded, the next appointment included the appropriate detailed assessment.

What to document at each stage of the perio care pathway

Periodontal management follows a defined pathway: screening, assessment, cause-related therapy, reassessment, and supportive periodontal therapy (or referral). Each stage has specific documentation requirements. Missing any stage creates a gap that a case examiner or expert witness will identify.

Free downloadable PMS-paste templates aligned with each BSP step:

• Scale & Polish (PmPR) template — Step 1 supragingival debridement + OHI
• Periodontal Assessment template — full 6-point chart + BSP staging & grading
• Root Surface Debridement (Step 2 NSPT) template — subgingival PmPR per quadrant
• Perio Review / SPC template — Step 4 supportive periodontal care
• Periodontal Surgery template — Step 3 surgical access / regenerative
• Guided Biofilm Therapy (GBT) template — disclosure-based maintenance

Pathway step: screening (BPE)

Record the BPE score for all six sextants in a clear format (e.g. “BPE: 2|1 / 1|3 / 2|2”). Document the highest code found and the corresponding clinical action. If all sextants score 0–2, record the matching action from the table above. If any sextant scores 3 or 4, state that detailed assessment is required and arrange the appropriate follow-up.

Pathway step: assessment and diagnosis

When BPE triggers a detailed assessment, the following must be documented:

• Six-point pocket charting — all teeth, both arches. Record the deepest reading at each of six sites per tooth.
• Bleeding on probing (BoP) — recorded as a percentage or by individual site. A BoP of 10% or less indicates good periodontal stability.
• Clinical attachment loss — measured as probing depth plus recession. This is the primary determinant of staging.
• Furcation involvement — teeth affected and grade (I, II, or III). Furcation involvement is a complexity factor that can upstage the diagnosis.
• Mobility — teeth affected and grade (I, II, or III). Progressive mobility suggests active disease or secondary occlusal trauma.
• Radiographic bone loss — percentage, pattern (horizontal or vertical), and teeth affected. The bone loss/age ratio determines grading.
• Plaque score — recorded as a percentage. Establishes the baseline for monitoring patient compliance.
• Risk factors — smoking status (including quantity per day) and diabetes status (HbA1c if available). Both are recorded as risk factors in the BSP diagnosis statement.
• Periodontal diagnosis — using the BSP staging and grading classification. For example: “Generalised periodontitis, Stage III, Grade B, currently unstable, risk factors: smoker 15/day.”
• Treatment plan discussed — including all options, risks of no treatment, and the patient’s decision. Record consent for the agreed treatment plan.

Pathway Step: Step 1–2 Therapy (Including Subgingival Instrumentation)

Each debridement appointment requires individual documentation. Record which sextants or quadrants were treated, the instrumentation used (ultrasonic and hand instruments with specifics), local anaesthesia (type, dose, site), any sub-gingival irrigation, oral hygiene instruction reinforced with specific advice, and post-operative instructions given. If the patient’s plaque control is poor despite repeated OHI, document this explicitly — it supports your clinical decisions if treatment outcomes are later questioned.

Pathway step: re-evaluation (about 3 months after Step 2)

The reassessment is the most important documentation point in the entire perio pathway. Your notes must demonstrate a direct comparison with baseline findings:

• Repeat six-point pocket charting — same format as baseline.
• Sites ≥4mm with bleeding on probing — compared with baseline count. These are the residual active disease sites that determine the next step.
• Plaque score — compared with baseline. Demonstrates patient compliance trajectory.
• Bleeding on probing percentage — compared with baseline. Stable = BoP <10%, all PPD ≤4mm, no BoP at 4mm sites; in remission = BoP ≥10%, PPD ≤4mm, no BoP at 4mm sites; unstable = any PPD ≥5mm, or 4mm with BoP (BSP).
• Treatment response assessment — documented as good, partial, or poor with evidence supporting the classification.
• Clinical decision — transition to SPT (with recall interval and rationale), further debridement, periodontal surgery, or referral to specialist. Document why.

Pathway step: Step 4 supportive periodontal care (SPC)

SPT is ongoing maintenance for stable periodontal patients. At each SPT visit, document: medical history update, smoking status, plaque score, bleeding on probing, probing depths at previously affected sites at every visit (with full-mouth probing depths recorded at least annually, BSP BPE guidance 2019), comparison with the most recent full charting, treatment provided (supra-gingival scaling, sub-gingival debridement of specific sites, OHI reinforcement), and the next recall interval with its clinical rationale. A patient with Stage III Grade C periodontitis requires a shorter recall interval than a Stage I Grade A patient — document why you have set the interval you have.

Common documentation failures in periodontal cases

Dento-legal case reviews and GDC fitness to practise proceedings involving periodontal disease reveal consistent documentation failures. These are the gaps that expert witnesses look for — and the gaps that most commonly lead to adverse findings:

1. No BPE recorded at examination or recall appointments. This is a common failure. Without a BPE, there is no evidence that periodontal screening took place. If a patient later develops advanced periodontitis, the absence of BPE records suggests the disease was never screened for — regardless of what actually happened.
2. BPE recorded but not acted upon. A BPE of 4 recorded at an examination appointment with no subsequent detailed assessment is worse than no BPE at all — it demonstrates that the clinician identified a potential problem and then failed to investigate it.
3. No staging or grading in the periodontal diagnosis. Diagnoses recorded as “periodontitis” or “chronic periodontitis” without staging and grading are inconsistent with current BSP guidelines. An expert witness reviewing these records will note that the classification system was not followed.
4. Missing plaque scores across the treatment pathway. Plaque scores are essential evidence of patient compliance. A patient whose plaque scores remain high across multiple visits may not be a suitable candidate for further treatment— but without documented plaque scores, this pattern cannot be demonstrated.
5. No comparison between baseline and reassessment. The reassessment note must demonstrate what changed. Notes that record new pocket depths without referencing baseline measurements fail to show whether treatment was successful.
6. OHI documented as “OHI given” with no detail. Generic OHI entries provide no evidence of what was discussed. Record specific advice: interdental brush sizes recommended, technique demonstrated, disclosing agent used, areas of persistent plaque highlighted.
7. No documentation of smoking or diabetes status. Both belong in the risk-factor part of the BSP diagnosis statement. Failure to record these risk factors means the grading cannot be properly determined or defended.
8. Referral discussion not documented. When residual pockets of 5mm+ with BoP persist after cause-related therapy, the notes should record whether referral to a periodontist was considered. If the patient declines referral, record that the option was offered and declined.

Good vs poor perio documentation: worked examples

The difference between defensible and indefensible periodontal documentation is stark. These anonymised examples illustrate the contrast.

Example 1: BPE screening at examination

This note does not record the BPE scores, does not specify what “gums OK” means clinically, and defaults to a standard recall interval without justification. If this patient later presents with advanced periodontitis, these records offer no evidence that periodontal screening was properly conducted.

Example 2: periodontal assessment

This note omits: the specific pocket depths, bleeding on probing, clinical attachment levels, furcation involvement, mobility, radiographic bone loss, plaque score, smoking status, diabetes status, and — critically — the staging and grading diagnosis. There is no evidence that a systematic periodontal assessment took place, and no documentation of consent for the treatment plan.

Example 3: reassessment

How structured templates prevent perio documentation gaps

The common thread across all periodontal documentation failures is omission — not incompetence. Clinicians know they should record BPE scores, plaque percentages, and staging/grading diagnoses. The problem is that under time pressure, with a full appointment book, it is easy to skip the fields that seem obvious or secondary. Structured templates reduce this risk by making the key fields part of the workflow.

A dental notes app like Nosht includes dedicated periodontal charting templates for every stage of the perio pathway — BPE screening, detailed assessment, debridement, reassessment, and SPT. Each template is structured around BSP guidelines and prompts for the specific documentation that stage requires:

• BSP staging and grading built into the assessment template — you select the stage (I–IV) and grade (A–C) from structured options. The template guides you through the classification criteria so you do not need to memorise them.
• Risk factor prompts in the perio templates — smoking status and diabetes status are prompted fields in the periodontal assessment. In Bulletproof, the note is flagged if smoking status is missing, or if diabetes status is missing when periodontitis is diagnosed.
• Plaque score and OHI fields at every visit — plaque scores are not optional extras in Nosht’s perio templates. They are part of the core workflow, ensuring the compliance data is captured at every appointment.
• Bulletproof Mode for perio documentation — Nosht’s Bulletproof Mode checks documentation completeness — flagging missing consent records, absent risk discussions, incomplete post-operative instructions, and undocumented treatment alternatives. For periodontal notes it also checks for a staging and grading diagnosis and smoking status, and the perio assessment template requires a plaque score.
• Patient information leaflets — Nosht includes 68 patient information leaflets, free to read online. On a paid plan you can send one to a patient from your note. Sending uses the patient’s email address or phone number for that message only. For perio patients, leaflets covering gum disease, interdental cleaning, and post-debridement care support the oral hygiene instruction you document in your notes.

The templates prompt for the elements of a BSP-aligned periodontal record, so less depends on memory. You remain responsible for the content of every note. For details on how Nosht’s templates are structured around GDC record-keeping requirements and FGDP(UK) guidelines, see those dedicated guides.

Frequently asked questions

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