Dental Literature Watch · Guideline · Periodontics
Stage IV periodontitis: keep the teeth, design for cleansability, recall every 3 months
TL;DR
- Tooth retention is the first-line strategy in Stage IV periodontitis, graded as a strong recommendation, and that includes teeth of questionable prognosis.
- Suggested: preserve the integrity of the arch by avoiding extractions when teeth can be retained. Direct and indirect restorations and gingival epitheses (veneers) may be considered for aesthetics and function.
- Orthodontics is suggested only once the endpoints of periodontal therapy are reached. Monitor the periodontium during treatment, withdraw active forces if recurrence appears, and keep life-long passive retention.
- Rehabilitation has to be cleansable. Place an interim prosthesis early in therapy but generally only after adequate oral hygiene is established, and design every prosthesis for home care and professional plaque removal.
- Suggested avoiding combined tooth- and implant-supported FDPs. Patients considering implants must be told about the increased risk of peri-implantitis and implant loss.
- Supportive periodontal care starts at 3-monthly intervals and is then personalised, with a UK maximum interval of 12 months. Residual pockets of 5 mm or more raise the risk of recurrence even in supportive care.
- New in the UK version: a recommendation to treat periodontitis to improve metabolic control in diabetes. The Cochrane review behind it found a mean HbA1c reduction of 4.7 mmol/mol (0.43%) at 3 to 4 months.
What changed
| Area | What the guideline sets | UK adolopment |
|---|---|---|
| Overall strategy | Recommend tooth retention first line, even for questionable-prognosis teeth. Suggest avoiding extractions if teeth can be retained. | Adopted |
| Case type 1: hypermobile teeth, no replacement needed | Temporary splinting and/or limited selective occlusal adjustment may be considered during therapy. Long-term splinting may be considered for persistent or increasing mobility. | Adopted |
| Case type 2: migration amenable to orthodontics | Suggest orthodontics once the endpoints of periodontal therapy are achieved. Recommend regular periodontal monitoring during treatment and passive life-long retention afterwards. | Adapted: root-resorption wording softened to “may not lead to an elevated risk”; a one-month healing period after regeneration downgraded to “may be considered”; fixed or removable appliances both “may be considered”; fiberotomy not endorsed |
| Case type 3: tooth-delimited gaps | Suggest tooth-supported FDPs when abutments are maintainable and restorable, and implant-supported FDPs when they are not. Resin-bonded FDPs may be considered for small spaces and should not be used for large ones. | Resin-bonded wording adapted to add good-quality abutment teeth |
| Case type 3: posterior free-end | A shortened dental arch with sufficient occluding units (second premolar to second premolar) may be considered without replacement. If more units are needed, suggest implant-supported FDPs, or metal-framework RPDs when implants are not an option. | Adapted: a tooth-supported cantilever FDP may be considered when only one extra occlusal unit is needed to establish a shortened dental arch |
| Case type 4: full-arch | With four or more maintainable, bilaterally distributed abutments, a tooth-supported full-arch FDP. With tooth preservation impossible and four or more adequately sized implants, suggest an implant-supported full-arch FDP. | Tooth-supported full-arch FDP downgraded from “suggest” to “may be considered” |
| Planning rules for types 3 and 4 | Recommend cleansable designs, a final evaluation of abutment prognosis before the definitive prosthesis, and implant work-up of hard and soft tissue. Suggest avoiding combined tooth/implant-supported FDPs. | Interim prosthesis “generally only after” adequate hygiene; the “if alternatives are feasible” qualifier on combined FDPs dropped |
| Supportive periodontal care | Recommend regular SPC to reduce tooth loss over five years or more, 3-monthly at first, then guided by risk (smoking, hyperglycaemia, pocket depths, bleeding on probing). | Adapted: maximum interval of 12 months |
| Systemic health | Suggest treating periodontitis in people with co-morbid NCDs to reduce systemic inflammation. Whether it improves hard outcomes such as myocardial infarction is unclear. | Adopted, plus a new de novo recommendation to treat periodontitis to improve metabolic control in diabetes |
💎 Insight — what this means chairside
The default is to keep the teeth and make the case easy to clean
The guideline asks you to exhaust simple retention measures before planning replacement.
Splints, direct and indirect restorations and a gingival epithesis come before extraction and implants.
The guideline asks you to exhaust simple retention measures before planning replacement.
Splints, direct and indirect restorations and a gingival epithesis come before extraction and implants.
Stabilise first, then rehabilitate
Orthodontics waits for the endpoints of periodontal therapy.
An interim prosthesis goes in early, but generally only once the patient's hygiene is adequate, and implants follow treatment of periodontitis because unstable disease is a key risk factor for biological complications.
Orthodontics waits for the endpoints of periodontal therapy.
An interim prosthesis goes in early, but generally only once the patient's hygiene is adequate, and implants follow treatment of periodontitis because unstable disease is a key risk factor for biological complications.
Count abutments before choosing the prosthesis
Four or more maintainable, bilaterally distributed teeth point towards a tooth-supported full-arch FDP, which the UK downgraded to “may be considered”.
Four or more adequately sized implants, when teeth cannot be saved, point towards an implant-supported full-arch FDP.
Four or more maintainable, bilaterally distributed teeth point towards a tooth-supported full-arch FDP, which the UK downgraded to “may be considered”.
Four or more adequately sized implants, when teeth cannot be saved, point towards an implant-supported full-arch FDP.
Not every missing molar needs replacing
A stable patient with second premolar to second premolar in occlusion, no flaring or elongation risk and no complaints may need no free-end replacement.
Where one extra unit is wanted, the UK version allows a tooth-supported cantilever FDP to establish a shortened dental arch.
A stable patient with second premolar to second premolar in occlusion, no flaring or elongation risk and no complaints may need no free-end replacement.
Where one extra unit is wanted, the UK version allows a tooth-supported cantilever FDP to establish a shortened dental arch.
Supportive care is part of the prosthetic plan
Tooth loss in treated patients on regular supportive care is low: a meta-analysis cited in the article found about 3% of 323,111 teeth lost.
The same meta-analysis found the full endpoints of therapy met in only 1.35% of patients, so residual pockets are common and recall intensity matters.
Tooth loss in treated patients on regular supportive care is low: a meta-analysis cited in the article found about 3% of 323,111 teeth lost.
The same meta-analysis found the full endpoints of therapy met in only 1.35% of patients, so residual pockets are common and recall intensity matters.
⚠️ The catch
Most rehabilitation recommendations are open ones
“May be considered” is the guideline's weakest grade, used where evidence was unclear.
It frames the options for case planning rather than dictating one, and several UK edits are downgrades in strength.
“May be considered” is the guideline's weakest grade, used where evidence was unclear.
It frames the options for case planning rather than dictating one, and several UK edits are downgrades in strength.
“Stage IV” means two things
In the 2018 World Workshop classification it flags complications that need rehabilitation, such as loss of five or more teeth, bite collapse or fewer than 20 teeth.
In the BSP implementation it means advanced bone loss reaching the apical third of the root, which almost always leads to the same complications.
In the 2018 World Workshop classification it flags complications that need rehabilitation, such as loss of five or more teeth, bite collapse or fewer than 20 teeth.
In the BSP implementation it means advanced bone loss reaching the apical third of the root, which almost always leads to the same complications.
What is not known
The guideline states that it is not known whether long-term SPC is cost-effective or whether it changes patient-reported outcomes.
Whether treating periodontitis improves hard systemic outcomes is unclear, and the diabetes recommendation rests on HbA1c, not complications.
The guideline states that it is not known whether long-term SPC is cost-effective or whether it changes patient-reported outcomes.
Whether treating periodontitis improves hard systemic outcomes is unclear, and the diabetes recommendation rests on HbA1c, not complications.
This page is written from a summary article
It is the authors' overview of the adolopted recommendations, not the full BSP or EFP guideline documents.
Check the guideline itself for the evidence grading and consensus strength of any single recommendation.
It is the authors' overview of the adolopted recommendations, not the full BSP or EFP guideline documents.
Check the guideline itself for the evidence grading and consensus strength of any single recommendation.
⚡ Bottom line
- Stage IV patient with teeth of doubtful prognosis → try to retain them first, and avoid extractions that break the arch if retention is feasible.
- Migrated, drifting anteriors → finish periodontal therapy to the endpoints before moving them, monitor at each orthodontic visit, retain for life.
- Planning a bridge or full arch → count maintainable abutments first, design for cleansability, and avoid mixing teeth and implants in one FDP.
- Discussing implants → document the increased risk of peri-implantitis and implant loss, and treat the periodontitis first.
- Finishing active therapy → 3-monthly supportive care to begin with, personalised by risk, never beyond 12 months in the UK version.
- Diabetic patient with periodontitis → treat it; it is now a stand-alone recommendation to improve metabolic control.
🧪 Questions
Tap an answer — instant grade, deciding line, and the trap.
A 58-year-old with treated Stage IV periodontitis is stable on supportive care. Lower right second premolar and all other teeth from second premolar to second premolar are present and in occlusion, both lower right molars are missing, and there is no flaring or elongation of opposing teeth. He chews comfortably and wants to know if he must replace them. Which approach does the guideline allow?
A shortened dental arch with sufficient occluding units may be considered without replacement — second premolar to second premolar, no evident risk of flaring or elongation, adequate comfort: every condition is in the stem. Implant-supported FDP is the suggestion when a free-end patient requires additional occluding units, and he does not. Cantilever FDP is permitted only when one extra occlusal unit is needed to establish a shortened arch. Metal-framework RPD is the fallback when extra units are needed and implants are not an option. Trap: the implant, the reflex answer for any missing molar.
A 61-year-old has just completed active treatment for Stage IV periodontitis and is entering supportive periodontal care. You are setting her first recall interval. Which plan follows the guideline?
SPC starts 3-monthly, then the interval is titrated to individual risk — smoking, hyperglycaemia, pocket depths, bleeding on probing — with the UK maximum of 12 months. Six-monthly is the generic stable-adult recall and starts too slowly here. Twelve-monthly is the ceiling of the personalised range, not the starting point. Three-monthly for life misses the guideline's instruction to personalise once the patient's stability is known. Trap: the 12-month figure, which is real but is a ceiling.
You are planning a lower right restoration in a patient with Stage IV periodontitis. Which design does the guideline suggest avoiding?
The guideline suggests avoiding combined tooth/implant-supported FDPs because of the risk of tooth loss and prosthesis failure; the UK version dropped the “if alternatives are feasible” qualifier. Resin-bonded FDPs may be considered for small spaces with good abutments, and only large spaces are the exclusion. Metal-framework RPD may be considered as a transitional or definitive option. Tooth-supported FDP is the suggested design when abutments are maintainable and restorable. Trap: the combined bridge looks efficient because it saves an implant.