Key takeaways
- Many complete-denture wearers struggle to eat with the lower denture because it is too mobile.
- The McGill consensus recommended a two-implant mandibular overdenture as the first choice for an edentulous lower jaw.
- Trials from 6 months to 9 years found that denture more stable, more comfortable, and easier for chewing and speech than a new conventional denture.
- Two implants and a clip-in denture are not four implants and a fixed All-on-4 bridge.
| Question | McGill 2002 |
|---|---|
| Which denture fails people at meals? | The complete lower denture. It is too mobile. The upper denture is the one people usually wear without problems. |
| What should be the first choice for an edentulous lower jaw? | A two-implant overdenture. A conventional lower denture was no longer the most appropriate first choice. |
| What did trials of 6 months to 9 years find? | More satisfaction than with a new conventional denture, with bar, ball, or magnet attachments. More stable, easier chewing, more comfortable, easier speech. |
| Is that All-on-4? | No. All-on-4 is four implants and a fixed bridge. The consensus overdenture comes out. |
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See which lower option fitsWhy do people struggle with a lower denture?
The McGill consensus statement, from a May 2002 symposium and published by Feine, Carlsson, and colleagues, puts the problem in one sentence. Complete denture wearers are usually able to wear an upper denture without problems, but many struggle to eat with the complete lower denture because it is too mobile. Conventional dentures rely on the residual alveolar ridge and the mucosa for support and retention. Many patients have trouble adapting, especially to the mandibular prosthesis.[1]
The widespread use of denture adhesive is one indication, they wrote, that these prostheses are inadequate for many wearers. That line is unpacked in denture adhesive versus implants. The foods they mention are hard or tough ones that wearers report being unable to eat. This page does not add a calorie claim on top of that sentence.[1]
Dentures compared with dental implants is the broader comparison. The upper plate, which the statement treats as the manageable one, is in an upper denture versus upper All-on-4.
Is the recommended implant denture the same as All-on-4?
The recommended implant denture is a removable overdenture on two lower implants, and All-on-4 is a fixed bridge on four. Mandibular two-implant overdentures were superior to conventional dentures in randomized and non-randomized trials lasting from six months to nine years. Whatever the attachment (bar, ball, or magnet), people were significantly more satisfied than with new conventional dentures. They found the implant overdenture more stable, rated chewing as easier, and were more comfortable and spoke more easily. Quality of life was significantly higher for patients who received the two-implant overdenture opposing a complete maxillary denture.[1]
The conclusion follows that evidence: restoration of the edentulous mandible with a conventional denture is no longer the most appropriate first choice, and a two-implant overdenture should become the first choice. Two implants. A denture that is still a denture. Snap-on dentures versus All-on-4 is where the fixed four-implant bridge is set beside that clip-in denture.[1]
Why does Renew still offer more than one lower option?
The consensus sets a minimum they wanted recognized: two implants and an overdenture, rather than a conventional lower denture alone.[1] A fixed lower bridge uses more implants and does not come out. The lower jaw implants page is the clinic's page for that jaw. Which of those prostheses fits depends on the bone, the opposing teeth, and whether the person wants a denture they remove.
The implant surgeon places the implants. Tom Szarski, DD, is the denturist who designs and fits the overdenture or the fixed teeth with the on-site lab. A free consultation includes a 3D scan. The scan is how a two-implant overdenture and a fixed lower bridge stay as two plans, both available, each tied to the evidence that actually describes it.
Sources
Frequently asked questions
Why does a lower denture move more than an upper one?
The McGill consensus said complete denture wearers are usually able to wear an upper denture without problems, but many struggle to eat with the complete lower denture because it is too mobile. Conventional dentures depend on the residual ridge and the mucosa, and the statement says the mandibular one is the harder adaptation.
How many implants did the consensus recommend?
Two, in the lower jaw, holding a removable overdenture with a bar, ball, or magnet. That was their first-choice treatment for an edentulous mandible. It is not a fixed bridge and it is not All-on-4.
What improved in the trials?
Across randomized and non-randomized trials lasting 6 months to 9 years, people were significantly more satisfied with the two-implant overdenture than with a new conventional denture. They found it more stable, easier for chewing, more comfortable, and easier for speech. Quality-of-life ratings were higher when that lower overdenture opposed a conventional upper denture.
