Overview
Both options replace an entire arch of teeth. They differ in nearly every other dimension. An All-on-4 restoration uses four implants to support a fixed bridge that is screwed in place and only removed by a dentist[1]. A conventional denture rests on the gums (and palate, on the upper jaw) and is taken out daily by the patient.
At a glance: All-on-4 fixed bridge vs Conventional removable denture
This table summarises the most common decision factors. Every row is expanded in the sections that follow.
| Factor | All-on-4 fixed bridge | Conventional removable denture |
|---|---|---|
| How it is anchored | 4 implants integrated into bone | Suction (upper) or gravity + muscle control (lower) |
| Removability | Fixed — only a dentist removes it | Removed daily by patient |
| Bone preservation | Yes — implants load and preserve bone | No — ridge resorbs progressively over years |
| Chewing force | Close to natural dentition | Roughly 20–30% of natural for lower; better for upper with suction |
| Palatal coverage (upper) | None — palate is open | Full palate covered, affecting taste and sensation |
| Speech | Adaptation 1–2 weeks | Adaptation 2–6 weeks, sometimes longer |
| Time to function | Often same-day fixed provisional | Final denture in 4–8 weeks |
| Upfront cost (per arch, US) | High (typically tens of thousands USD) | Low (often a small fraction of All-on-4) |
| Long-term outcomes | 10–18 yr cohort data: high implant survival, prosthesis success >90% | Functional but progressive ridge loss, repeated remakes / relines |
What each option does to the jaw over time
Without tooth roots loading the bone, the alveolar ridge atrophies. Conventional denture wearers experience continued ridge resorption year after year — the lower denture in particular often becomes progressively less stable as the bone underneath shrinks. An All-on-4 prosthesis loads the bone through its four implants and tends to preserve the ridge in the loaded area[3].
Function and quality of life
Patients who switch from a complete denture to a fixed implant bridge frequently report that the change is among the most significant medical decisions of their adult lives — chewing efficiency, food choice, social comfort, and confidence all improve. Upper denture wearers in particular regain palatal sensation and a more accurate sense of taste when the palate is no longer covered.
What the long-term data shows for All-on-4
A long-term cohort by Maló and colleagues followed All-on-4 mandibular cases for 10–18 years and reported high implant and prosthesis survival[1]. A separate systematic review across multiple centres reported broadly similar outcomes[2]. The prosthesis itself (acrylic / zirconia bridge) is more likely to need maintenance — fracture, wear, screw issues — than the implants.
Cost over a realistic horizon
A conventional denture is dramatically cheaper upfront. Over 20 years a denture wearer typically pays for multiple relines and at least one full remake, and continues to experience declining ridge quality. All-on-4 carries a high initial cost but, when maintained and reviewed regularly, the implants commonly outlast the prosthesis. Replacing the acrylic bridge after 10–15 years is far less expensive than the original treatment.
Who is, and is not, a good candidate for All-on-4
- Adequate bone in the front of the jaw for four implants (sometimes obtainable with limited grafting).
- Medically suitable for outpatient oral surgery and able to commit to maintenance.
- Non-smoker, or willing to stop around surgery.
- Realistic expectations: a fixed bridge needs daily cleaning under the bar with specialised brushes / waterpik.
How to decide
There is rarely a universally correct answer. The right choice depends on the condition of the surrounding teeth and bone, your medical history, your budget, your tolerance for surgery, and what you want the result to feel and look like ten years from now. Bring this comparison to a consultation and ask the clinician to explain — in your specific case — why one option is being recommended over the other.
Frequently asked questions
Scientific references
- 1. Maló P, de Araújo Nobre M, Lopes A, Ferro A, Nunes M. (2019). The All-on-4 treatment concept for the rehabilitation of the completely edentulous mandible: A longitudinal study with 10 to 18 years of follow-up. Clin Implant Dent Relat Res. 21(4):565-577. View source
- 2. Soto-Peñaloza D, Zaragozí-Alonso R, Peñarrocha-Diago M, Peñarrocha-Diago M. (2017). The all-on-four treatment concept: Systematic review. J Clin Exp Dent. 9(3):e474-e488. View source
- 3. Moraschini V, Poubel LA, Ferreira VF, Barboza ES. (2015). Evaluation of survival and success rates of dental implants reported in longitudinal studies with a follow-up period of at least 10 years: a systematic review. Int J Oral Maxillofac Surg. 44(3):377-88. View source