[HỎI ĐÁP BÁC SĨ]: Should Full-Arch Implants on Both Jaws Be Done at the Same Time or Staged?

Hello Mark. If almost all of your upper and lower teeth are missing or genuinely cannot be preserved, it is possible to rehabilitate both arches with fixed Implant-supported prostheses.

But I would not automatically perform upper and lower All-on-4 or All-on-6 surgery at the same time simply because both arches need treatment.

Nor would I say that staging the two jaws is automatically safer.

The decision depends on the total surgical burden, your medical health, how many remaining teeth need extraction, the amount and distribution of bone in each jaw, whether grafting is required, whether the implants can achieve sufficient primary stability, and how predictable the provisional bite will be after surgery.

There are patients for whom treating both arches during the same surgical episode is a very reasonable plan.

There are other patients for whom I would deliberately separate the treatment into stages even if that requires additional appointments or travel.

The safest treatment is the one matched to your particular anatomy and health—not the one with the fewest visits.

There is clinical precedent for treating both jaws simultaneously.

Published clinical reports have described bimaxillary immediate full-arch rehabilitation in which upper and lower implants were placed and provisional fixed prostheses were delivered during the same treatment sequence.

However, the specific literature on simultaneous bimaxillary treatment is much smaller than the evidence base for full-arch rehabilitation of a single jaw.

One prospective report of simultaneous upper and lower full-arch immediate loading involved only eight patients and noted that provisional-prosthesis fractures were among the mechanical complications encountered.

That tells us that simultaneous bimaxillary treatment is technically possible in selected patients.

It does not prove that doing both jaws together is universally better or safer.

For that reason, Bác sĩ would not use “both arches in one day” as a marketing objective.

It is simply one possible treatment sequence.

The first question in your case is actually whether every remaining tooth truly needs to be removed.

You said that you are missing almost all of your teeth, rather than that both jaws are completely edentulous.

Any remaining natural teeth should therefore be examined individually for periodontal support, decay, endodontic condition, mobility and restorative prognosis.

If a tooth has a realistic long-term prognosis, Bác sĩ would not remove it merely to create a more convenient two-arch All-on-X treatment.

If the remaining teeth are severely compromised and maintaining them would only postpone inevitable tooth loss, then All-on-X full-arch implant treatment can be considered for one or both jaws.

The second question is whether both jaws have equally favorable bone.

They often do not.

The mandible and maxilla behave differently clinically.

Mandibular bone is often denser, while the posterior upper jaw can have lower-density bone together with limitations created by the maxillary sinuses.

Long-term All-on-4 evidence supports predictable treatment in both jaws, but some clinical datasets have reported more early Implant failures in the maxilla than in the mandible.

That does not mean upper All-on-4 is unsafe.

It means that Bác sĩ should not assume that the loading decision made for the lower jaw automatically applies to the upper jaw.

For example, you may have excellent mandibular bone and four lower implants that achieve strong primary stability, while the upper jaw has substantial resorption and one or more implants achieve less favorable stability.

In that situation, the lower provisional arch might qualify for immediate fixed loading while the upper arch requires a more protective loading protocol.

I would not force both jaws into exactly the same timetable simply because they were operated on during the same appointment.

The International Team for Implantology emphasizes that immediate fixed loading of an edentulous arch should be based on the Implant-prosthodontic plan, bone volume, Implant number and distribution, and confirmation of primary Implant stability.

Significant simultaneous bone augmentation or sinus-floor elevation is also considered a relative contraindication to immediate loading.

This is particularly relevant when both arches are being treated.

If the upper jaw requires sinus augmentation and the lower jaw does not, there may be no biological advantage in forcing both arches through the same loading protocol.

The third issue is the total surgical burden.

Treating both jaws together can mean removing multiple teeth, preparing eight to twelve Implant osteotomies depending on the treatment design, placing the implants, possibly contouring bone, suturing both arches and completing the provisional restorative workflow.

For a medically healthy patient, that may still be reasonable.

For another patient, it can create an unnecessarily long procedure.

I would therefore review cardiovascular health, blood pressure, diabetes, kidney function when relevant, medications, anticoagulant or antiplatelet use, smoking, previous anesthesia history and the patient's ability to tolerate a prolonged appointment.

At age 57, your age itself would not normally be the deciding factor.

Your physiological health is much more important.

There is also a practical recovery issue when both jaws are treated simultaneously.

If only one arch undergoes surgery, the opposing arch may still provide a relatively stable reference during early function.

If both upper and lower arches are surgically treated and both receive provisional fixed prostheses, essentially your entire occlusal system has changed at once.

That is not necessarily a problem.

In fact, one advantage of treating both arches together is that Bác sĩ can rebuild the upper and lower tooth positions, vertical dimension and bite as one coordinated prosthetic system.

This can be particularly useful if your existing bite has collapsed after years of severe tooth loss.

However, it also means that both provisional arches require careful occlusal control while the implants are integrating.

You cannot simply rely on an untreated natural arch to guide the bite.

The restorative plan therefore becomes particularly important.

If we choose to stage your treatment, that also does not necessarily mean waiting six months before touching the second arch.

“Staged” simply means that the two surgical treatments are deliberately separated.

Depending on your medical condition, anatomy and international schedule, the second arch might be treated during the same Vietnam stay on another surgical day, or it might be treated during a later phase.

I would not specify the interval before examining you because the reason for staging determines how long the interval should be.

If we stage only to reduce the burden of one prolonged appointment, the interval can be relatively short once early recovery from the first procedure is satisfactory.

If we stage because the upper jaw requires bone grafting, the interval may need to be several months.

If we stage because a systemic condition needs reassessment, the second procedure should wait until the relevant medical issue is stable.

These are clinically different scenarios even though patients may describe all of them as “doing one jaw at a time.”

There is another important distinction between surgical staging and definitive-prosthesis staging.

Even if upper and lower implants are placed during the same operation and provisional fixed teeth are provided shortly afterward, the definitive long-term bridges are generally not made during that first few days.

Dr. Care's current full-arch pathway describes provisional restoration during the early phase followed by approximately 4–6 months of healing and Implant integration before the definitive prostheses are completed.

Therefore, “both jaws at the same time” usually refers to surgery and provisional treatment—not to completing two final permanent arches immediately.

That distinction is particularly important for a U.S. patient planning travel.

An uncomplicated simultaneous two-arch case may reduce the number of surgical trips, but you would still generally need a later definitive prosthetic phase.

I would pay particular attention to the provisional phase if both arches are treated together.

You will need fixed teeth that allow you to speak and maintain appearance, but the bite should not subject newly placed implants to uncontrolled forces.

The provisional period also allows Bác sĩ to test tooth length, midline, smile position, facial support, speech and vertical dimension before transferring those findings to the definitive restorations.

For someone who has been missing most teeth for a long time, the original bite may already have collapsed.

Trying to reconstruct two complete arches from an old denture or severely worn remaining teeth can therefore require careful prosthodontic assessment.

I would not treat that part of the case as secondary to the Implant surgery.

The implants are the foundation; the final objective is a stable, cleanable and comfortable upper-lower restorative system.

This is also why the number of implants should be determined separately for each arch.

You do not necessarily need All-on-4 in both jaws.

You could, for example, ultimately have four implants in one arch and six in the other if the bone anatomy and prosthetic plan justify that configuration.

ITI consensus recommends a minimum of four appropriately distributed implants for a one-piece fixed full-arch prosthesis, but Implant number and distribution should follow the final prosthetic plan, arch form and available bone.

Six should not be chosen simply because it sounds stronger, just as four should not be chosen simply because it costs less.

The decision is finalized after the clinical examination and CBCT as part of Dr. Care's standard clinical dental implant protocol.

For a two-arch patient, I would use CBCT to evaluate both jaws separately and then relate those findings to one combined prosthetic design.

In the upper jaw, the maxillary sinuses and residual posterior bone are important.

In the lower jaw, the inferior alveolar nerves and mental foramina must be mapped accurately.

Bác sĩ also needs to evaluate restorative space, lip and facial support, existing vertical dimension and how the two new arches will meet.

Technology such as DCARER dynamic navigation can be used when clinically indicated to assist real-time control of Implant position, angle and depth relative to the digital plan.

However, navigation does not make an excessively long operation medically appropriate, does not create missing bone and does not guarantee that both arches will qualify for immediate loading.

The decision to treat simultaneously still depends on patient selection.

If you are coming from the United States, the travel advantage of simultaneous surgery is obvious.

Instead of making one surgical trip for the upper jaw and another for the lower jaw, you may be able to complete both surgical phases during the same stay.

But I would not let airfare dictate the surgical plan.

A saving of one international flight is not worthwhile if one arch would be treated more predictably after graft healing or in a shorter separate procedure.

For an uncomplicated double-arch treatment, I would also give yourself more postoperative buffer than I might recommend after one simple Implant.

You are adapting to new provisional teeth in both jaws, and there may be several restorative adjustments during the initial period.

I would want the wounds, provisional bridges and bite reviewed before you take a long flight back to the U.S.

Cost is another reason to confirm the arch-by-arch plan rather than simply asking for “a full mouth package.”

Dr. Care's current dental implant price list publishes full-arch prices per arch, not as one automatic two-jaw price.

At present, the complete reference range is approximately VND 139,000,000–223,000,000 per arch for All-on-4 and approximately VND 194,000,000–297,000,000 per arch for All-on-6 when the Implant component and currently listed definitive prosthetic options are combined.

If your upper and lower jaws require different Implant configurations or prosthetic materials, the two arches should therefore be quoted separately.

Bone grafting, sinus procedures and other individually required interventions may add additional costs.

Doing both arches on the same surgical day does not automatically make those additional procedures disappear.

I would want your quotation to state clearly:

For you, Mark, I would therefore make the recommendation conditionally.

If your remaining teeth truly have a hopeless prognosis, you are medically stable, both jaws have adequate bone, major grafting is not required, the anticipated procedure length is acceptable and Bác sĩ expects suitable Implant stability in both arches, treating the upper and lower jaws during the same surgical phase can be a reasonable way to reduce the number of major surgical trips and rebuild your bite as one coordinated system.

If the upper jaw is much more atrophic than the lower, if extensive grafting is required, if your medical history favors shorter procedures, or if Bác sĩ is concerned that one arch will not achieve the stability required for the intended provisional loading, I would stage treatment rather than force both jaws into one operation.

In some cases, the best compromise may be to complete both arches during the same Vietnam trip but separate the surgeries into different appointments.

That can reduce the length and physiological burden of one treatment session without automatically creating another international journey.

The exact interval would depend on why the procedures are being separated and how you recover from the first arch.

Most importantly, “simultaneous” should never mean that Bác sĩ must continue with the second jaw regardless of what happens during the first.

If surgery reveals poorer bone, greater bleeding, longer operating time or another concern, the treatment team should have the flexibility to stop and reschedule the second arch.

That is safer than treating the original schedule as a promise.

My preferred plan would therefore be decided only after examining both arches together, because the upper and lower restorations must ultimately function as one bite even though their surgical requirements can be very different.

This consultation is general guidance only because I have not yet reviewed your remaining teeth, CBCT, maxillary and mandibular bone volume, sinus and nerve anatomy, medical history, medications, bite or grafting requirements. Those findings determine whether simultaneous bimaxillary surgery, staged treatment during the same trip, or separate treatment phases are most appropriate for you.

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