Not every All-on-4 case is straightforward. Some patients arrive at Asensio Advanced Dentistry having already been told by other clinics that their situation is too complex, that they need extensive bone grafting, or that implant treatment is simply not possible for them. This is one of those cases.

The patient presented with complete edentulism of the upper jaw combined with significant maxillary bone atrophy — a condition in which the jawbone has resorbed substantially following long-term tooth loss. Cases of this kind are frequently rejected by implant centres that lack the surgical experience or the biomaterial protocols to handle them without aggressive intervention. At Asensio, this type of case is resolved using advanced biomaterials that allow implant placement without the need for extensive bone grafting, and the patient leaves the clinic with fixed teeth on the same day.

The clinical situation

Maxillary bone atrophy following prolonged edentulism presents a specific surgical challenge: the available bone volume is insufficient for standard implant placement, and the proximity of the maxillary sinus further limits the options available to surgeons who rely on conventional techniques alone. In many cases, the standard proposed solution involves sinus lift procedures and bone grafting — interventions that extend the overall treatment timeline by six to twelve months and add significant cost and surgical risk.

This patient had already been assessed by other dental professionals and told that their case required these aggressive procedures. Dr. Lucía Asensio Romero evaluated the case and identified an alternative pathway using biomaterials that restore the biological conditions for osseointegration without the need for full sinus lift surgery.

Dr. Lucía Asensio Romero and her team preparing biomaterials for a complex All-on-4 case with maxillary bone atrophy

The surgical approach

Dr. Asensio and her team performed a complete upper arch restoration using the All-on-4 technique with biomaterial augmentation. The angled posterior implants characteristic of All-on-4 allowed the team to avoid the most atrophic areas of the maxilla and the floor of the maxillary sinus, while the biomaterials created the conditions necessary for stable osseointegration in areas of reduced bone volume.

The procedure was completed in a single surgical session. The patient received a fixed provisional prosthesis on the day of surgery — able to eat soft food the same day — and returned home without the weeks of recovery that extensive bone grafting would have required.

Why complex cases require specialist experience

The outcome of implant treatment in complex cases depends almost entirely on the surgical team’s experience with non-standard anatomy and their familiarity with the biomaterial options available. A clinic that sees predominantly straightforward cases will often propose the most conservative or most familiar solution — which in cases of bone atrophy typically means grafting and a prolonged treatment timeline.

Asensio Advanced Dentistry has specialised in complex implant cases for over 30 years. Dr. Lucía Asensio Romero holds specialist qualifications in implantology and oral surgery and has placed over 5,000 implants. The clinic holds ISO 9001 certification from AENOR and is one of the few centres in the Valencia region with the surgical protocols to resolve severe atrophy cases without routine recourse to full sinus lift procedures.

If you have been told that your case is too complex or that you need bone grafting before implants, we recommend requesting a second opinion. Send us your existing X-rays and CT scans and we will assess your case at no cost before you travel. Call us on 0800 048 8058, email office@dentalasensio.co.uk, or visit our All-on-4 dental implants abroad page for more information.

Related All-on-4 guides

• All-on-4 dental implants cost in Spain — full price breakdown and comparison with UK costs
• How All-on-four treatment works — the complete procedure explained step by step
• All-on-4 implants vs artificial dentures — why fixed implants are a permanent alternative
• How to clean All-on-4 dental implants — daily routine and professional care guide

Frequently asked questions about complex All-on-4 cases

Can All-on-4 be performed in patients with severe bone atrophy?

In many cases yes. The angled implant design used in All-on-4 maximises the use of available bone and avoids the most atrophic areas. When combined with biomaterial protocols, osseointegration can often be achieved without full sinus lift surgery. Every case is assessed individually with a 3D CT scan before any treatment is planned.

What are biomaterials and how do they help?

Biomaterials in implantology are synthetic or biological substances that promote bone regeneration around the implant site. They create the conditions for stable osseointegration in areas where native bone volume is reduced, without requiring the patient to undergo a full bone graft procedure.

I have been told I need a sinus lift before implants. Is this always necessary?

Not always. Sinus lift procedures are indicated when there is insufficient bone height below the maxillary sinus for standard implant placement. However, the angled implant technique used in All-on-4 can often avoid this area entirely, and biomaterial augmentation can compensate for reduced bone volume in other areas. Whether a sinus lift is genuinely necessary depends on the specific anatomy of each patient and the surgical approach available to the treating team.

What is the difference between a standard All-on-4 case and a complex one?

A standard All-on-4 case involves adequate bone volume and relatively straightforward anatomy. A complex case involves factors such as severe bone atrophy, proximity to anatomical structures like the maxillary sinus or mandibular nerve, previous failed implants, or systemic conditions that affect healing. Complex cases require additional surgical planning, specialist experience and often the use of biomaterials or alternative implant configurations.

Can I get a second opinion at Asensio without travelling to Valencia first?

Yes. Send us your existing X-rays, CT scans and any previous treatment plans to office@dentalasensio.co.uk and we will provide a preliminary assessment. If we believe we can help, we will invite you for a free consultation in Valencia that includes a new OPG X-ray and a detailed treatment plan.