One missing tooth, two respectable ways to fill it, and a decision most people are asked to make in a ten-minute appointment with a price list. This is the unhurried version: how each option actually works, what each really costs over ten years rather than on day one, and the honest cases where the bridge wins.
Two engineering philosophies
- An implant replaces the missing tooth root-and-all: titanium in the bone, crown on top, neighbours untouched
- A bridge spans the gap using the teeth either side as pillars, which must be ground down to pegs to accept the anchoring crowns
- That grinding is the bridge’s original sin: it converts two healthy teeth into load-bearing, crowned teeth, and crowned teeth have a measurable rate of nerve death over time (5–13% per prepared tooth in the prosthodontic literature)
Day-one cost vs ten-year cost
On day one the bridge wins comfortably, on the NHS it’s a Band 3 course at £332.10 (England, April 2026), and privately typically £800–£2,500 for three units. The ten-year ledger reads differently:
| Implant | Bridge | |
|---|---|---|
| Upfront (private, London) | £2,100 (ours, fixed) | £800–£2,500 (3 units) |
| NHS route | Not available for routine cases | £332.10 (Band 3) |
| Typical lifespan | 96.4% still in service at 10 years (Howe et al., 2019); frequently 25+ | 10–15 years, then remake |
| Damage to other teeth | None | Two healthy teeth permanently prepared |
| Bone beneath the gap | Preserved, the implant loads it like a root | Continues shrinking under the pontic |
| Failure mode | Rare (~2%); usually replaceable | Often takes a pillar tooth with it, turning 1 gap into 2–3 |
| Realistic 25-year cost | Usually the original fee + crown renewal | 2–3 bridges, plus treatment for pillar teeth |
The bridge’s cheapest decade is its first. The implant’s cheapest decade is every one after that.
The biology the invoice doesn’t show
Beneath every unfilled or bridge-covered gap, the jawbone is resorbing, bone stays dense only when a root loads it, and studies of healed extraction sites report up to half the ridge width lost within the first year (Schropp et al., 2003). A bridge restores the visible tooth while this continues underneath, which is why long-standing bridges develop the tell-tale hollow beneath the false tooth. An implant is the only replacement that acts as a root and holds the bone, the difference compounds silently for decades, and it’s the real reason dentists overwhelmingly choose implants for their own mouths.
A tale of two patients: the same gap, ten years on
Two composites drawn from cases every implant clinic knows. Patient A, 2016: lower first molar lost, chooses a private bridge at £1,400, quick, no surgery, looks excellent. 2021: the bridge is serviceable but food traps beneath it as the bone hollows; the hygienist flags the rear pillar tooth struggling under its doubled load. 2024: that pillar fractures at the gum. The bridge is cut off; the pillar is extracted; the gap is now three teeth wide, the bone under the original space has spent eight years shrinking, and the quote on the table, implants plus grafting, is £6,800. Total ten-year spend: over £8,000, plus two more lost teeth.
Patient B, same year, same tooth: chooses a £2,100 implant. One hour of surgery, three months of healing, a crown. 2026: two-minute check at each hygiene visit, bite indistinguishable from natural, bone holding. Total ten-year spend: £2,100 and some floss. Composites, yes, but the mechanism in Patient A’s story isn’t bad luck; it’s the bridge’s known failure mode (pillar overload) meeting the gap’s known biology (bone loss), on schedule. The literature’s 10–15-year bridge lifespan is an average of exactly these stories.
What the NHS bridge route really involves
Since Band 3 (£332.10) is the comparison everyone reaches for, complete it honestly. First, access: only 39.8% of English adults saw an NHS dentist in the past two years, and around 14 million adults report unmet need (BDA), the Band 3 bridge exists in policy, but reaching it can take months of ringing practices with closed lists. Second, the same £332.10 buys either the bridge or a removable partial denture, and workload pressure means the denture is frequently what’s offered. Third, the NHS bridge is subject to the same biology as the private one, ground pillars, shrinking bone, just at a kinder upfront price. It remains the right call when budget binds; it’s simply not the free lunch the price difference implies. Our NHS guide covers the whole landscape, including the socket-preservation move that keeps your implant option alive for later.
Cost per year: the only fair scoreboard
| Route | Realistic 20-year outlay | Cost per year |
|---|---|---|
| Implant (private) | £2,100 + one crown renewal ~£700 | ~£133 |
| Private bridge | 2 bridges ~£2,800 + pillar treatment ~£1,500+ | ~£215+ |
| NHS bridge | 2 × £332.10 + pillar treatment (often private by then) | variable, rises with each failure |
Twenty-year projections are estimates, not promises, but the direction of travel is what the survival literature supports, and it only strengthens as the horizon lengthens.
When the bridge honestly wins
Fair is fair, there are cases where we recommend the bridge:
- The neighbouring teeth are already heavily filled or crowned, the grinding cost has largely been paid
- Medical factors make surgery genuinely unwise
- Budget is fixed at NHS Band 3 levels right now, a functioning £332.10 bridge beats an unaffordable implant (ask about socket preservation to keep the implant option open)
- The gap sits in a jaw with insufficient bone and the patient declines grafting
Around one consultation in five here ends with a recommendation that isn’t an implant. If your case is one of them, we’ll say so, the implant-retained bridge also exists as the middle path: bridge convenience, carried on implants, zero healthy teeth sacrificed.
What 96.4% survival actually means (and doesn’t)
Since the implant case leans on survival data, read it like a sceptic. The 96.4% figure (Howe et al., 2019) pools long-term studies of implants at ten years, meaning roughly one implant in twenty-five needed removal or replacement over a decade. It is survival, not perfection: an implant can survive while needing a crown re-cement or a gum-health intervention along the way. The main threat to the surviving majority is peri-implantitis, inflammation of the gum and bone around an implant, which is overwhelmingly a hygiene-and-maintenance disease: it’s why every credible implant plan builds in hygienist visits, and why “fit and forget” is the one promise no honest dentist makes. Bridges have their own well-documented curve: systematic reviews put conventional bridge survival near 90% at ten years but falling steeply thereafter, with pillar-tooth complications, decay under the anchor crowns, root fractures, as the dominant failure route. Both numbers are good dentistry; only one of them ages well.
Daily life: cleaning, feel and the apple test
Spreadsheets aside, you live with this choice at breakfast. Cleaning: an implant crown brushes and flosses exactly like the tooth it replaced; a bridge demands threading floss or a water flosser under the false tooth daily, skip it and the pillars decay invisibly under their crowns. Feel: implants transmit bite through bone, so they feel like teeth; bridges feel excellent too, though the hollow beneath announces itself to the tongue as bone recedes. Confidence foods: both handle apples and steak when healthy, the difference is trajectory, since the implant’s function is stable while the bridge’s depends on two pillar teeth carrying 150% workload for the rest of their lives. Patients rarely regret either option in year one. The divergence is a year-eight phenomenon, which is exactly why this guide keeps dragging the timeline out that far.
Deciding in one consultation: bring this checklist
- Ask for the scan first, bone volume decides whether this is even a two-option question
- Ask about the neighbours, virgin teeth argue implant; heavily-restored ones reopen the bridge case
- Ask for both prices over ten years, not day one, including expected remakes and maintenance
- Ask what the dentist would choose for their own mouth, and watch how fast the answer comes
- If choosing the bridge for budget, ask about socket preservation, £450 today keeps the implant door open for years
Whichever way you lean after all of this, take one action this month rather than none: get the gap scanned. Not because urgency sells implants, but because the scan is the only thing on this page that’s about your jaw rather than averages, and because the option-preserving moves (socket preservation, early placement) are all time-sensitive while the option-closing force (bone loss) never takes a month off. The consultation is free, the quote is fixed and written, and one appointment converts this entire guide from general argument into your specific answer.
Sources
• Howe MS et al. (2019), Journal of Dentistry, 10-year implant survival 96.4%
• Schropp L et al. (2003), post-extraction ridge changes, Int J Periodontics Restorative Dent
• Kontakiotis et al. (2015), pulp survival after full-coverage preparation
• NHS dental charges from 1 April 2026, NHS.UK