Key takeaways
- Hebel, Gajjar, and Hofstede wrote about replacing one tooth, in the Journal of the Canadian Dental Association in 2000.
- A conventional three-unit bridge reduces the neighbouring teeth. The authors said that raises the chance of root-canal treatment and root decay when those teeth were sound or lightly filled.
- They also wrote that cement washout can lead to tooth loss, and that failure of one part can take an abutment tooth with it.
- A full arch of failing teeth is a different comparison from that single gap.
| Option | What it asks of the mouth |
|---|---|
| Three-unit bridge | The neighbouring teeth are reduced. The authors said this increases endodontic treatment and root decay when those teeth were sound or lightly restored. Cement washout under a retainer can lead to tooth loss. If one part fails, the whole bridge can fail, often with an abutment. |
| Single-tooth implant | The adjacent teeth are not prepared and are not linked into the restoration. The authors called that the main advantage. The article is about one tooth, not a full arch. |
| Several failing teeth | Outside that paper. A full-arch implant bridge or a denture plan replaces a row. It is not a stack of three-unit bridges by default. |
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See which replacement fits the gapWhat does a bridge ask of the neighbouring teeth?
Hebel, Gajjar, and Hofstede published a peer-reviewed comparison in the Journal of the Canadian Dental Association in 2000, volume 66, pages 435 to 438. The options they discuss for a single tooth are a fixed partial denture, a resin-bonded restoration, and a single-tooth implant. They wrote that a conventional three-unit bridge is familiar work for most restorative dentists, and that it requires reduction of the abutment teeth. That reduction, they wrote, results in an increased incidence of endodontic therapy and root decay.[1]
They drew a line at the condition of those teeth. Large existing restorations might make abutment preparation useful. Virgin teeth, or teeth with small restorations, would be damaged and placed at higher risk. They also wrote that cement loss or washout under a retainer can lead to tooth loss, and that a bridge is one restoration: if one part fails, the whole restoration fails, often with loss of an abutment tooth. The implant's advantage, in their words, is that the adjacent teeth stay in their current state of health and are not splinted into a larger restoration.[1]
The paper says patients should hear both sides before choosing. It does not rank the options for a person who is losing many teeth at once.
When is a full arch a different comparison?
A three-unit bridge borrows strength from two teeth to fill one space. When those neighbours are themselves failing, the 2000 article's premise (sound or restorable abutments beside a single gap) no longer describes the mouth. Full arch treatment versus replacing teeth one by one is the comparison for a whole row of implant crowns versus one bridge on several implants. Dentures compared with dental implants is the comparison for a removable plate. A clip-in denture versus a fixed All-on-4 bridge is in snap-on dentures versus All-on-4.
Full arch dental implants is the service page for a fixed row. This article stays with the single-tooth evidence and points to those pages when the gap is no longer single.
Why is a three-unit bridge a different job from a full jaw?
The journal article is explicit about its subject: replacement of a single tooth. Using it to argue for or against All-on-4 would stretch a three-unit bridge into a jaw it never measured.[1] The useful part, for someone with one or two failing teeth next to sound ones, is the preparation of those neighbours. The useful part, for someone whose remaining teeth are the problem, is noticing that the article does not cover that mouth.
The implant surgeon places implants. Tom Szarski, DD, is the denturist who designs and fits implant teeth and dentures with the on-site lab. A free consultation includes a 3D scan. The scan is what shows whether the neighbours can carry a bridge, or whether the plan has to be a denture or a full arch.
Sources
- Single-tooth replacement: bridge vs. implant-supported restoration — Journal of the Canadian Dental Association
Frequently asked questions
What is the difference between a dental implant and a bridge for one missing tooth?
Hebel, Gajjar, and Hofstede, in the Journal of the Canadian Dental Association, said a conventional three-unit bridge requires reduction of the teeth on either side. An implant replaces the missing tooth without preparing those neighbours. They were writing about a single gap.
Do the neighbouring teeth have to be cut down for a bridge?
For the conventional three-unit bridge they describe, yes. They wrote that the reduction increases the incidence of endodontic treatment and root decay, and that sound teeth or teeth with small fillings would be damaged by that preparation. Teeth that already have large restorations, they said, may benefit from being used as abutments.
Does that article decide a full mouth of failing teeth?
No. It is a single-tooth paper. When many teeth are failing, the comparison is a full-arch plan or a denture plan, not a three-unit bridge repeated across the jaw. Those options are separate articles.
