Implant request in an uncontrolled diabetic smoker with untreated periodontitis
A 58-year-old man with type 2 diabetes (HbA1c 8.4%, metformin, recently increased by his physician) and a 25-cigarette-a-day habit attends wanting implants to replace 36 and 46, missing for six and two years respectively. He is due to attend his daughter's wedding in four months and wants the implants placed at the first visit so that he can return to work the next day. Full-mouth plaque score is 48% and bleeding on probing 62%, with residual 6–7 mm pockets on 17, 27, 37 and 47 and generalised horizontal bone loss of 40–50%. Tooth 37 has grade II mobility. He reports no hypoglycaemic episodes. He has not had periodontal treatment for four years and has never seen a hygienist. He has tried to stop smoking once, unsuccessfully, and asks whether the whole case can be finished under sedation in a single appointment.
1. How would you prioritise his treatment, and what targets would you set before placing any implant?
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Sequence: periodontal treatment first, implants later. Placing implants into an untreated stage III/grade C patient with 6–7 mm pockets and 62% bleeding on probing invites peri-implantitis and implant loss. Implants are more vulnerable than teeth because they lack a periodontal ligament and a supracrestal connective tissue seal, so the same bacterial load is more damaging around an implant.
Targets before elective implant surgery: full-mouth plaque score below 20%, bleeding on probing below 10–20%, no residual pockets deeper than 4–5 mm, no sites with suppuration, completion of any indicated extractions, and re-evaluation 6–8 weeks later. Smoking: advise cessation and set a realistic goal - complete cessation, or at minimum a substantial reduction, for several weeks before and after surgery. Diabetes: write to his physician for current control, and aim for HbA1c below 7% (some would accept below 8% with caution); hyperglycaemia impairs wound healing and raises infection and failure risk.
The 37 with grade II mobility and 6–7 mm pocket is itself at risk and should be assessed for periodontal treatment or extraction before it undermines an adjacent site.
Explain that 'as soon as possible' and 'lasting' are competing goals, and that a wedding is not a clinical indication. A removable or resin-bonded provisional replacement for the wedding is the pragmatic compromise.
2. Compare implants with the alternatives for this patient, and explain the risks and timing you would present.
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Alternatives: a three-unit bridge from 35 to 37 is feasible only if 37 becomes periodontally stable; using a grade II mobile tooth with 40–50% bone loss as an abutment is questionable and may accelerate its loss. A removable partial denture is cheap and non-destructive but adds plaque and loads the abutments. Shortening the arch and leaving the space may be functionally acceptable if the premolars are in contact and the opposing teeth are not over-erupting.
Implant risks in this patient: smoking (roughly a doubling of failure risk at patient level), poorly controlled diabetes, a history of severe periodontitis (higher peri-implantitis risk), and a long-standing 36 site with likely ridge resorption that may need grafting and therefore more time. None is an absolute contraindication; each changes the consent conversation and the maintenance contract.
Timing: after periodontal re-evaluation, in healed sites, staged surgery if the ridge is deficient, and a provisional restoration for the wedding. Do not shorten healing time to meet a social deadline - this is exactly how patients end up with failed grafts and early implant loss.
What he must hear: implants have high survival in well-selected, well-maintained patients; his profile does not count as well selected until his periodontitis, smoking and glycaemia are controlled. Document the advice given and his decisions.
3. Set out the maintenance programme and the monitoring you would use to catch problems early.
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Maintenance: a 3-monthly supportive periodontal and peri-implant programme for at least the first year, with pocket charting, bleeding on probing, plaque scores, risk-factor review at every visit, and radiographic monitoring. Self-care: interproximal brushes sized to each embrasure, a powered brush, and no smoking.
Monitoring: peri-implant mucositis is bleeding with no bone loss and is reversible; peri-implantitis is bleeding plus bone loss, often with suppuration. Early detection depends on probing implants with light force (around 0.25 N), comparing bone levels over time, and checking for increasing pocket depth and suppuration - not waiting for mobility, which is a late sign.
Managing setbacks: if he relapses into smoking or his HbA1c rises, defer elective surgery rather than proceed, and document both the advice and his decision. Control of the periodontal condition takes precedence over the restorative timetable.
Restorative maintenance: check occlusion, screw access and prosthesis fit; a partially dentate patient may overload the implant.
Communicate the contract: an implant is not a one-off purchase. Without maintenance the failure risk rises, and in his case periodontitis, smoking and glycaemia - not the surgery - will determine the outcome.