All-on-4 abroad - what you need to know before choosing this treatment
All-on-4 is widely marketed to dental tourists. Here is what the procedure involves, why some cases fail, and what rescue looks like when it does.
All-on-4 is one of the most marketed procedures in dental tourism. The concept - four implants per arch supporting a fixed bridge - is legitimate and can work well in the right case with the right surgeon. But it is also the treatment that generates the largest share of implant rescue cases at our clinic. This article explains what All-on-4 involves, where the risks lie, and what rescue looks like when it goes wrong.
What All-on-4 actually means
All-on-4 is a technique using four implants per arch (upper or lower jaw), with the two posterior implants angled to avoid the sinus or nerve and gain anchorage in available bone. A fixed bridge loads onto those four implants.
It was developed by Nobel Biocare and has a published clinical evidence base. The concept is sound when case selection is correct - meaning bone volume supports four well-positioned implants and the patient's health and bite load are appropriate.
Why All-on-4 cases fail
Most failures we see in rescue work involve one or more of the following: poor case selection (insufficient bone for four implants), implant overloading (poor bridge design or parafunctional habits like grinding), infection (peri-implantitis), or inadequate surgical technique.
Some clinics extend the All-on-4 label to six implants (All-on-6) or other configurations with different evidence bases. The marketing term does not always match the treatment delivered.
- Insufficient bone volume at implant sites
- Bridge overloading from poor design or occlusion
- Peri-implantitis - infection around implant fixtures
- Rushed treatment without adequate diagnostic imaging
- Using implant systems without published clinical evidence
How All-on-4 compares to basal full mouth restoration
Our full mouth restoration approach uses basal or bicortical implants - typically eight per arch - anchored in cortical bone. This differs from conventional All-on-4 in implant count, anchorage strategy, and immediate loading profile.
For patients with severe bone loss or high failure risk, basal strategies can reach bone volume that All-on-4 cannot. That is why some patients who were told they needed sinus lifts, or who failed All-on-4 elsewhere, are candidates for our pathway.
What rescue involves after a failed All-on-4
Rescue after All-on-4 failure is not simply replacing the bridge. It starts with diagnosing what caused the failure - bone loss, infection, implant position, bridge design - and addressing those root causes before any new treatment.
Our Implant Rescue Protocol follows six phases from diagnosis through biological reconstruction to long-term maintenance. Rescue timelines vary significantly by case complexity.
Related reading
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