All on 4 vs All on 6

Understanding the differences.

All on 4 vs All on 6 Comparison

All on 4 and All on 6 are both full-arch treatments that use a fixed set of replacement teeth supported by dental implants. The main difference is the number of implants used to support the arch.

Some people may be treated with four implants, while others may require six, depending on factors such as jaw anatomy, bone quality and the support needed for the planned bridge. The recommended approach is determined through a clinical assessment rather than personal preference.

Similarities

Same Fixed restoration

Both all on 4 and all on 6 have even load distribution across the implants which helps maintain jawbone levels over time

Same Daily maintenance

Both require brushing, flossing and routine check-ups

Same Reported Longevity

Implants have a 96% survival rate at 10 years [1]. The prosthesis typically lasts 10–20+ years [2] [3].

All on 4

Starts from $23,500
Ideal for individuals with adequate bone density and standard jaw anatomy

All on 6

Starts from $25,500
Ideal for individuals with inadequate bone density and non-standard jaw anatomy

All on 4

Starts from $23,500
Ideal for individuals with adequate bone density and standard jaw anatomy

All on 6

Starts from $25,500
Ideal for individuals with inadequate bone density and non-standard jaw anatomy

Why Might Someone Need All on 6?

The teeth on a prosthesis are supported by the implants beneath them, so adding two more implants spreads the load across more anchor points. This can be useful in certain situations including

Lower bone density

Bone density varies from person to person, and the upper jaw is generally softer than the lower jaw. Where bone is less dense, spreading the load across six implants rather than four can reduce the force carried by each one.

Higher bite forces

People who clench or grind place greater pressure on their teeth. Additional implants help distribute that pressure across a wider base of support.

A larger or wider jaw

A physically larger arch spans a greater distance. More implants can reduce the length of unsupported span between anchor points.

Reducing cantilever length

A cantilever is the part of the fixed teeth that extends beyond the last implant, a little like the end of a diving board. The longer that section, the more leverage it places on the implants. Positioning an implant further back can shorten the cantilever and help balance the load.

Does More Implants Mean Better Results?

Not necessarily. More implants do not automatically mean a better outcome. What matters is whether the number and position of the implants are appropriate for the individual.

In some cases, four well positioned implants can provide stable support; in others, six are more appropriate. Using fewer implants where clinically suitable can also mean a less invasive procedure and a simpler recovery.

Research into full-arch implant treatment also shows that outcomes need to be considered alongside factors such as implant survival, bone levels and biological or mechanical complications—not implant number alone.[2][3]

What the Comparison Does Not Tell You

The information provided gives you a framework, it is not a substitute treatment plan. Several factors determine which option is clinically appropriate for your specific situation and must be assessed in person.

How much bone you have remaining affects whether implants are possible, and whether additional procedures such as bone grafting may be required first.
⁠Your general health and medical history are reviewed as part of any implant assessment and may influence which options are appropriate for you.
⁠Your goals and priorities whether that is function, aesthetics, convenience, or cost, are part of the clinical conversation, not an afterthought.

References

[1] Malo P, de Araújo Nobre MA, Lopes A, Moss SM, Molina Perez GJ. (2019). Immediate loading (Same Day Teeth) concept with All-on-4: retrospective clinical report. Clinical Implant Dentistry and Related Research, 21(4), 681–695. PMID: 31304663. https://pubmed.ncbi.nlm.nih.gov/31304663/

[2] Soto-Penaloza D, Zaragozi-Alonso R, Penarrocha-Oltra D, Penarrocha-Diago M. (2017). The all-on-four treatment concept: Systematic review. Journal of Clinical and Experimental Dentistry, 9(3), e474–e488. PMID: 28298989. https://pubmed.ncbi.nlm.nih.gov/28298989/

[3] Papaspyridakos P, Chen CJ, Singh M, Weber HP, Gallucci GO. (2021). Success criteria in implant dentistry: A systematic review. Journal of Dental Research. PMID: 21940744. https://pubmed.ncbi.nlm.nih.gov/21940744/

All on 4 vs All on 6 FAQs

Does All on 6 cost more than All on 4?

Yes, All on 6 typically costs more than All on 4 due to the additional implants and surgical time required during treatment. All on 4 starts from $23,500, with All on 6 priced individually based on individual assessment. Exact costs are confirmed after a consultation.

Will I need bone grafting for All on 4 or All on 6?

Bone grafting is sometimes required for either All on 4 or All on 6 treatment if there is insufficient bone volume to support the implants. However, this is more commonly discussed in relation to All on 6 or more complex cases. Whether you need it depends entirely on the bone volume shown in your 3D scan. This is reviewed during your initial assessment.

How long do All on 4 and All on 6 implants last?

Both All on 4 and All on 6 implants are designed for long-term wear, but it is not possible to predict exactly how long individual implants or bridges will last.

Long-term studies of All-on-4 treatment have reported that many implants and prostheses remain in function over extended follow-up periods[1]. Survival rates do not mean that treatment is free from complications or maintenance. Outcomes vary accordingly based on oral hygiene, general health, smoking, bite forces, implant position, and ongoing professional care.

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