If you are researching full mouth dental implants, you have likely come across both All-on-4 and All-on-6 as treatment options. At first glance, they may seem almost identical, both use a small number of strategically placed implants to support a complete fixed arch of teeth, and both can deliver a stable, natural looking result. But the differences between them are clinically meaningful, and understanding those differences can help you have a more informed conversation with your dental team.
This guide explains what sets All-on-4 and All-on-6 apart, the clinical reasoning behind each approach, and the key factors that typically guide the decision between them. It is worth noting upfront that neither option is universally superior. The right choice depends entirely on your individual clinical situation, particularly the quality and volume of your jaw bone.
At Hutt Dental Implant Centre in Lower Hutt, Wellington, each patient is assessed individually using advanced imaging before any treatment recommendation is made. The decision between implant configurations is guided by clinical evidence and your specific anatomy, not a fixed protocol applied to everyone.
Understanding the Core Concept Behind All-on-X
Both All-on-4 and All-on-6 are variations of the All-on-X full mouth implant in Lower Hutt, where a full arch of fixed teeth is supported by a small number of implants. The number refers to how many implants are placed per arch. A key feature is the angulation of certain implants, which helps maximise contact with available bone, especially in areas with lower density. This makes an all-on-x full mouth implant in Lower Hutt a practical option without extensive grafting. Both methods are clinically proven, and the right choice depends on your bone structure and individual treatment needs.
What Is All-on-4?
The All-on-4 configuration uses four implants to support a complete arch of teeth. Two implants are placed vertically toward the front of the jaw, while two are placed at angles, typically between 30 and 45 degrees, toward the rear of the arch.
This angled placement at the back serves an important purpose. It allows the rear implants to avoid key anatomical structures, the maxillary sinus in the upper jaw, and the inferior alveolar nerve in the lower jaw. By angling away from these structures, the implants can still engage areas of denser, more stable bone without requiring the patient to have significant bone volume in the posterior regions of the jaw.
All-on-4 was developed in part as a practical solution for patients who had been told they needed extensive bone grafting before implant treatment could begin. By making intelligent use of the available bone through strategic angulation, it opened up full arch implant treatment to a broader group of patients. For suitable candidates, it can deliver clinically strong, long lasting results.
What Is All-on-6?
All-on-6 follows the same foundational concept as All-on-4 but adds two additional implants, typically placed in the posterior region of the arch, for a total of six implants per arch.
The primary benefit of those extra implants is load distribution. Chewing generates significant force over time. When that force is spread across six points of contact rather than four, each individual implant bears a proportionally smaller share of the load. This wider support base can improve the biomechanical stability of the restoration, particularly over the long term.
Six implants also mean six locations where the titanium integrates with the jaw bone, a process known as osseointegration. More osseointegration points can contribute to the overall stability and durability of the final restoration.
All-on-6 generally requires more available bone, particularly in the posterior regions of the arch where those additional implants are placed. Patients with good bone volume throughout the jaw are often well suited to this configuration.
Key Differences at a Glance
1) Number of implants: All-on-4 uses four per arch; All-on-6 uses six. This affects load distribution and the number of osseointegration sites.
2) Bone requirements: All-on-4 is designed to work well where posterior bone volume is reduced. All-on-6 generally requires sufficient bone at additional implant sites in the rear of the arch.
3) Load distribution: All-on-6 spreads chewing forces across a wider base, which may offer biomechanical advantages in patients with the bone to support it.
4) Bone grafting: All-on-4 is often chosen specifically to avoid the need for bone grafting. All-on-6 may require preparatory grafting if bone is limited in the areas where the additional implants need to be placed.
5) Clinical suitability: Neither option suits every patient. The appropriate configuration is determined by imaging and clinical assessment, not patient preference alone.
Which Option Is Right for You?
All-on-4 and All-on-6 at Hutt Dental Implant Centre, Lower Hutt
Hutt Dental Implant Centre, located at 65–71 Queens Drive in Central Lower Hutt, serves patients across the Wellington region with advanced, patient-focused care. Using detailed imaging technology, the team carefully evaluates bone structure to recommend the most suitable treatment based on individual needs.
For those considering Dental Implants in Lower Hutt, options such as All-on-X full mouth solutions are tailored to each patient’s clinical condition. IV sedation is available to ensure a relaxed experience throughout the procedure. From consultation to final restoration, patients receive clear guidance, helping them make informed decisions about restoring function, comfort, and long-term oral health.
Frequently Asked Questions
Is All-on-6 always better than All-on-4?
Not necessarily. More implants can provide a wider support base, and for patients with sufficient bone volume that can be a clinical advantage. However, All-on-4 was specifically designed to achieve strong outcomes in patients where placing six implants, particularly in the posterior arch, would not be straightforward without prior bone grafting. For suitable candidates, All-on-4 delivers clinically reliable results. The more appropriate configuration depends on the individual’s bone anatomy and clinical presentation, not on a simple assumption that more implants equals a better outcome.
Can I have All-on-6 if I have some bone loss?
It depends on the extent and location of the bone loss. If bone loss is limited, or confined to specific areas, there may still be sufficient bone to support six implants with careful planning. If bone loss is more pronounced in the posterior regions of the jaw, All-on-4 may be the more suitable approach, using angled implants to engage denser bone further forward. Advanced imaging at Hutt Dental Implant Centre allows the clinical team to assess this in detail before making a recommendation.
Will I notice a difference between All-on-4 and All-on-6 in everyday use?
For most patients, the day to day experience of a well functioning All-on-4 and a well functioning All-on-6 restoration is very similar. Both provide a fixed, stable set of teeth that allow for normal eating and speaking. The differences between the two configurations are primarily clinical and biomechanical, relating to the number of support points and how load is distributed, rather than differences that most patients would readily notice during everyday use. What matters most is that the configuration chosen is well matched to your clinical situation.
How long does the All-on-4 or All-on-6 process take from start to finish?
The full process, from initial consultation through to the placement of your final arch, typically spans several months. Dental Implant surgery and a set of provisional teeth can generally be completed on the same day. Osseointegration, the process by which the implants fuse with the jaw bone, then takes approximately three to six months. Once osseointegration is confirmed, the final arch is fitted. The exact timeline varies between individuals depending on healing, bone quality, and whether any preparatory treatment is needed. The team at Hutt Dental Implant Centre will provide a personalised timeline at your consultation.
Conclusion
All-on-4 and All-on-6 are both well established approaches to full arch implant treatment. Each is suited to specific clinical situations, and the choice between them is not about one being universally better than the other, it is about which approach is most appropriate for your individual jaw anatomy, bone density, and overall oral health.
If you are in the Lower Hutt or Wellington area and would like to better understand your options, the team at Hutt Dental Implant Centre is available to guide you through a personalised assessment. Treatment planning is individual, and a conversation with the clinical team is the clearest way to understand which path forward makes sense for you.
