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All-on-6 dental implants abroad is a full-arch rehabilitation technique that replaces all the teeth in one jaw using six strategically placed implants, supporting a fixed prosthesis from the day of surgery in many cases. For UK patients travelling to Spain, All-on-6 uses the same Nobel Biocare implant systems found in British clinics at 55% to 70% lower cost, backed by a lifetime guarantee on materials.

Deciding between All-on-4 and All-on-6 can feel confusing when different clinics recommend different numbers of implants for what sounds like the same problem. The truth is that the right technique depends on your available bone volume, bite force and long-term functional goals — not on whichever package a clinic happens to sell. Choosing the wrong option can mean paying for implant support you don’t actually need, or accepting less long-term stability than your jaw could support.

At Asensio Advanced Dentistry in Valencia, All-on-6 cases are planned and performed by Dr. Lucía Asensio Romero, a specialist in implantology and oral surgery with over 30 years of experience and more than 5,000 implants placed — her clinical credentials are independently verifiable on Doctoralia. Using 3D digital planning and guided surgery, we assess each patient individually to determine whether All-on-4 or All-on-6 is the appropriate technique for their anatomy.

What is All-on-6 and how does it work?

All-on-6 uses six implants per arch to support a full-arch fixed prosthesis, typically distributed with two implants at the front of the jaw and two on each side towards the back, following the natural curve of the arch. Compared with All-on-4, the two additional implants spread the biting load across a wider area of the jawbone, which increases the total surface contact between implant and bone and can provide additional mechanical support in patients whose bone volume is good throughout the whole arch, not only at the front.

The surgical principle behind All-on-6 is the same as All-on-4: implants are placed using guided 3D surgery planned from a CT scan, and — when the implants achieve enough primary stability at the time of surgery — a fixed provisional prosthesis can be fitted on the same day. The healing period that follows allows osseointegration, the biological process in which bone fuses directly onto the titanium implant surface, to take place before the definitive prosthesis is fitted. All-on-6 restorations are usually finished with a zirconia or a hybrid acrylic-and-titanium prosthesis, and the material is chosen based on bite force, aesthetic preference and budget.

All-on-6 developed alongside All-on-4 as full-arch implant dentistry matured over the past two decades, and both techniques now have long-term published clinical data supporting their use. Neither technique is inherently superior in isolation: All-on-4 was specifically engineered to work with limited bone by angling the two posterior implants at 45 degrees, while All-on-6 is designed to add implant support wherever the patient’s bone volume allows it across the full arch. Which technique suits a given patient is determined by clinical assessment of their bone and bite, not by how a package happens to be marketed.

All-on-6 vs All-on-4: which technique is right for you?

Both techniques replace a full arch of missing or failing teeth with a single fixed prosthesis, and both are available at Asensio using Nobel Biocare or Klockner implants under the same lifetime guarantee on materials. The table below summarises the main clinical differences between the two options.

Factor	All-on-4	All-on-6
Number of implants per arch	4	6
Bone volume required	Works with limited bone via angled posterior implants	Needs adequate bone volume across the full arch
Bite force distribution	Concentrated across 4 support points	Distributed across 6 support points
Best indicated for	Full arch loss with moderate to limited bone	Full arch loss with good bone volume and higher bite force needs
Likelihood of bone grafting	Low — specifically designed to avoid it	Low to moderate — depends on posterior bone density
Typical cost	Lower — fewer implants	Higher — two additional implants

In practice, most patients with significant bone loss — particularly at the back of the jaw — are better candidates for All-on-4, which was engineered specifically to work with reduced bone by angling the posterior implants at 45 degrees to maximise contact with the bone that is available and avoid anatomical structures such as the sinus or the mandibular nerve. Patients with well-preserved bone volume across the whole arch, a naturally strong bite, or a history of breaking dentures, bridges or previous implant restorations under heavy biting force, may benefit from the additional mechanical support that six implants provide compared with four.

Both options are assessed during the free first consultation using a 3D CT scan, and the final recommendation is made only once your bone volume, bite pattern and overall clinical situation have been reviewed — never before. It is also common for the two techniques to be combined asymmetrically within the same patient, for example six implants on one side of the arch where bone allows it and a more conservative approach on the other, depending on what the CT scan shows. For a complete overview of every implant option we offer, see our dental implants abroad page.

All-on-6 dental implants abroad: cost considerations

All-on-6 costs more than All-on-4 because it uses two additional implants, and each implant adds to the surgical, material and laboratory cost of the case. As a reference point, a single-arch All-on-4 at Asensio starts from £6,959, including extractions, four implants and a fixed provisional prosthesis fitted on the day of surgery, with both arches from £13,052 — All-on-6 sits above these figures, with the exact difference depending on the number of additional implants ultimately needed, the implant brand selected, and the material chosen for the final prosthesis.

What stays constant across both techniques is the scale of the saving compared with UK prices: patients travelling from the UK to Valencia for full-arch implant treatment typically save 55% to 70% versus equivalent private treatment at home, using the same Nobel Biocare and Klockner implant systems and the same lifetime guarantee on materials that a UK clinic would offer, at a fraction of the cost. The 3D CT scan used to plan every full-arch case, whether All-on-4 or All-on-6, costs £79 at Asensio versus £250 or more typically charged in the UK, and is included automatically as part of the treatment quote once a patient proceeds.

Because All-on-6 pricing depends heavily on individual anatomy — bone volume, the final number of implants placed and the prosthesis material chosen — we do not publish a fixed headline price for it in the way we do for All-on-4. Every All-on-6 case is quoted individually after the free first consultation, which includes the 3D CT scan and a written, itemised treatment plan with no obligation to proceed, so you know the full cost before committing to travel. View our full treatment price list for reference pricing on related procedures, or call us free on 0800 048 8058 for a personalised estimate.

The All-on-6 procedure step by step

Stage	What happens	Visit required
1. Free consultation	OPG X-ray, 3D CT scan, bone volume assessment, personalised treatment plan	Yes (or remote assessment)
2. Surgery day	Extractions, 6 implants placed, fixed provisional teeth fitted same day where primary stability allows	Yes
3. Osseointegration	3–6 months healing at home in the UK with provisional fixed teeth	No
4. Final prosthesis	Definitive zirconia or hybrid restoration fitted and adjusted	Yes

Most All-on-6 cases require two trips to Valencia, in the same way as All-on-4, with direct flights available from multiple UK airports in around two and a half hours. The first trip covers the consultation and the surgery itself, which can often be scheduled on consecutive days to minimise time away from home and work. During this visit, any remaining failing teeth are extracted, the six implants are placed under local anaesthesia using guided 3D surgery, and — where primary stability allows — a fixed provisional prosthesis is fitted before you fly home, so you are never without functional, fixed teeth. Conscious sedation with nitrous oxide is available throughout for patients who feel anxious about dental treatment, and most patients report manageable discomfort rather than severe pain in the days following surgery.

The osseointegration period that follows lasts approximately three to six months and is spent at home in the UK, wearing the fixed provisional prosthesis and going about normal daily life with only minor dietary adjustments while the implants settle. During this time the six implants fuse gradually with the surrounding jawbone, building the mechanical stability that will support the definitive restoration long term. You return to Valencia for a second visit once osseointegration is confirmed, at which point the provisional prosthesis is removed and the definitive zirconia or hybrid prosthesis — custom designed from impressions and digital scans taken earlier in the process — is fitted and fine-tuned for bite and appearance before you fly home with your final, permanent teeth. Find out more about how our dental tourism process works.

Who is a good candidate for All-on-6 abroad?

All-on-6 is generally indicated for patients who have lost, or are about to lose, all the teeth in one or both arches, but who retain good bone volume throughout the jaw — not only at the front. Patients with a naturally strong bite, a history of bruxism, or those who have previously broken removable dentures or fixed bridges under heavy biting force, are often good candidates, since distributing the load across six implants rather than four can offer additional long-term mechanical support in these specific situations.

All-on-6 is not usually the right choice for patients with significant bone loss in the posterior jaw, since placing six implants successfully requires adequate bone across a wider area than All-on-4 needs. In these cases, All-on-4 — which angles the posterior implants specifically to work around limited bone — or, in cases of severe maxillary atrophy, zygomatic implants anchored in the cheekbone rather than the jaw itself, are usually the more appropriate route. This is precisely why bone volume is always assessed with a 3D CT scan before any technique is recommended: the number of implants should follow the patient’s anatomy, never the other way around.

Patients replacing an older, failing full-arch restoration — for example a worn implant-supported bridge, or implants placed many years ago that are now failing — are also frequently suitable for All-on-6, particularly when the goal is to upgrade to greater long-term stability. As with any full-arch case, general health factors such as uncontrolled diabetes or heavy smoking are reviewed during the free consultation, since they affect healing and long-term implant success regardless of how many implants are ultimately placed.

Why choose Asensio for All-on-6 dental implants abroad?

We use exclusively Nobel Biocare and Klockner implants — two of the most clinically validated implant systems in the world — and back every All-on-6 case with a lifetime guarantee on materials. Our ISO 9001 certification from AENOR means our clinical processes are independently audited to the same standard applied to major European hospital groups, and every full-arch case is planned using a Planmeca Promax 3D digital scanner and guided surgery before a single implant is placed, giving both surgeon and patient a precise, predictable plan from the outset rather than a generic package.

We also accept complex cases that other clinics have turned away, including patients with uneven bone density across the arch who need a combined approach — for example a standard implant pattern on one side of the jaw and additional support or a different technique on the other, depending on what the CT scan shows. Every case is reviewed individually in our 500m² clinic in Valencia rather than fitted into a fixed package, and second opinions are welcome for patients who have been quoted elsewhere. Call us free on 0800 048 8058 or email office@dentalasensio.co.uk to discuss your case.

Once your All-on-6 restoration is fitted, daily cleaning is essential to protect it for the long term, and the maintenance routine is essentially the same as for All-on-4: a specific full-arch or interdental brush, a water flosser to clean beneath the prosthesis, and a professional hygiene review roughly every six months. Neglecting this routine is the leading cause of peri-implantitis, the bacterial infection that is the most common reason full-arch restorations fail over time. See our full-arch implant cleaning guide and our general dental implant care guide for the complete routine.

Frequently asked questions about All-on-6 dental implants abroad

How much do All-on-6 dental implants cost abroad?

All-on-6 costs more than All-on-4 because it uses two additional implants, and the exact price depends on bone volume, implant brand and the final prosthesis material. As a reference, single-arch All-on-4 at Asensio starts from £6,959; All-on-6 is quoted individually after a free consultation and 3D CT scan. UK patients typically still save 55% to 70% compared with equivalent private treatment at home. View our prices page for reference costs.

Is All-on-6 better than All-on-4?

Neither technique is universally better — the right choice depends on your bone volume and bite force, not on the number of implants alone. All-on-4 was specifically designed to work with limited bone, while All-on-6 adds support where bone volume allows it across the whole arch. We recommend the technique that fits your anatomy after a 3D CT scan, not the one with more implants by default.

How many implants does All-on-6 use and where are they placed?

All-on-6 uses six implants per arch, typically two at the front and two on each side towards the back, following the curve of the jaw. This distributes bite force across a wider area of bone than the four implants used in All-on-4.

How many trips to Spain does All-on-6 require?

Typically two trips, the same as All-on-4. The first covers the consultation and surgery, which can often be scheduled on consecutive days. You return home with fixed provisional teeth and come back three to six months later for the definitive restoration.

How do I clean All-on-6 dental implants?

The cleaning routine for All-on-6 is the same as for any full-arch implant restoration: daily brushing with a specific full-arch or interdental brush, a water flosser to clean under the prosthesis, and professional hygiene reviews every six months. See our full-arch implant cleaning guide for the complete routine.

Related guides

• All-on-4 dental implants abroad — full arch rehabilitation with fewer implants, for patients with limited bone
• Dental implants abroad at Asensio — full overview of every implant option we offer
• All-on-4 cost in Spain — full price breakdown and UK comparison
• Zygomatic implants — when standard implants aren’t possible due to severe bone loss
• How to clean full-arch implants — daily routine, tools and professional care
• Dental implant recovery — what to expect after full-arch surgery
• Best countries for dental implants abroad — how Spain compares for UK patients
• How dental tourism in Spain works — planning your trip to Valencia

Dental implant recovery follows a predictable pattern for most patients — discomfort peaks in the first 48 hours and reduces significantly within a week, after which the majority of patients return to normal activity. The osseointegration period that follows, lasting 3–6 months, is largely symptom-free. Understanding what to expect at each stage removes uncertainty and helps patients manage their recovery confidently.

At Asensio Advanced Dentistry in Valencia, every patient receives written aftercare instructions before leaving the clinic after surgery. Dr. Lucía Asensio Romero, specialist in implantology and oral surgery with over 30 years of experience, leads all implant procedures and reviews at the clinic. This guide covers the key stages of recovery for UK patients travelling home after treatment.

Recovery timeline: day by day

Timeframe	What to expect	What to do
Day 1	Numbness from anaesthetic wears off in 2–4 hours. Mild to moderate soreness, possible minor bleeding, swelling begins	Rest, apply ice pack to cheek (20 min on/off), take prescribed pain relief, soft diet only, do not rinse
Days 2–3	Swelling typically peaks — this is normal. Soreness continues but manageable with medication	Continue soft diet and pain relief. Gentle saline rinse from day 2. Avoid strenuous activity
Days 4–7	Swelling reduces significantly, soreness decreases. Most patients feel well enough to return to desk work	Over-the-counter pain relief if needed. Begin gentle brushing around implant site. Soft diet continues
Week 2	Minimal discomfort in most cases. Gum tissue continues to heal around implant	Normal oral hygiene routine. Gradually return to normal diet avoiding hard or crunchy food
Weeks 3–4	Soft tissue fully healed in most cases. Implant stable — osseointegration well underway	Full cleaning routine including interdental brush and water flosser. Normal diet resumes
Months 1–6	Osseointegration period — no symptoms expected. Implant integrating with bone	Daily cleaning routine, avoid smoking, attend local dentist for routine hygiene if needed

Returning to the UK after implant surgery

Most patients travelling from the UK to Valencia for implant surgery fly home within 2–3 days of their procedure. Flying does not affect osseointegration or healing. Before leaving the clinic, Asensio provides:

What you receive before departure	Purpose
Written aftercare instructions	Step-by-step guide for the recovery period in English
Prescription medication	Antibiotics and pain relief to cover the recovery period
Clinical records and X-rays	For sharing with your UK dentist for routine follow-up
Emergency contact	24-hour line: 0800 048 8058 — contact us directly if you have any concerns during recovery

All-on-4 recovery vs single implant recovery

All-on-4 full arch surgery involves more extensive intervention than a single implant — multiple extractions, four implant placements and immediate prosthesis fitting in a single session. Recovery follows the same pattern but the initial discomfort and swelling are typically more pronounced:

Factor	Single implant	All-on-4
Surgery duration	45–90 minutes	4–6 hours
Initial swelling	Localised, mild to moderate	More pronounced, both sides of jaw
Return to normal activity	2–3 days	3–5 days
Soft diet period	1–2 weeks	6–8 weeks
Osseointegration	3–6 months	3–6 months

Signs that require prompt attention

Some discomfort and swelling in the first week is expected and normal. The following signs are not normal and should be assessed promptly — contact us on 0800 048 8058 if you experience any of them:

Sign	Possible cause
Persistent or worsening pain after day 5	Possible infection or dry socket
Swelling that increases after day 3	Possible infection
Heavy or persistent bleeding	Clot disruption — apply gentle pressure and contact us
Implant feels loose or mobile	Early osseointegration complication — requires immediate assessment

Frequently asked questions

How long does it take to recover from dental implant surgery?

The initial recovery — swelling, soreness and dietary restrictions — takes approximately 1–2 weeks for a single implant and 3–6 weeks for All-on-4. The osseointegration period that follows takes 3–6 months but is largely symptom-free. Most patients return to normal daily activity within 3–5 days of surgery.

Can I fly home the day after implant surgery?

Yes. Most Asensio patients fly back to the UK 2–3 days after surgery. The cabin pressure change during flying does not affect healing or osseointegration. Ensure you have your prescription medication, aftercare instructions and emergency contact number before you travel.

What can I eat after dental implant surgery?

A soft diet is essential for the first week — yoghurt, eggs, soup, mashed vegetables, soft fish and fruit juices. Avoid hard, crunchy, chewy or very hot food during this period. For All-on-4 patients, a soft diet is recommended for 6–8 weeks while the implants integrate.

When can I exercise after implant surgery?

Light walking is fine from day 2. Avoid strenuous exercise, heavy lifting and contact sports for at least one week — physical exertion increases blood pressure and can cause bleeding or disrupt the healing clot. Most patients resume normal exercise after 7–10 days.

How do I care for my implants during recovery?

Follow the aftercare instructions provided at the clinic. From day 2, gentle saline rinses help keep the site clean. From week 2, normal brushing around the implant with a soft toothbrush is recommended. See our full dental implant care guide for the long-term routine. Call us on 0800 048 8058 or visit our dental implants abroad page for more information.

Related guides

• Dental implants abroad at Asensio — full overview of implant treatments for UK patients
• Care of dental implants — long-term daily routine and professional review guide
• Osseointegration — the healing process after implant placement
• Peri-implantitis — the main infection risk and how to prevent it
• All-on-4 dental implants abroad — full arch replacement with same-day fixed teeth
• How dental tourism in Spain works — planning your trip to Valencia

A single dental implant costs between £2,000 and £3,500 at a private UK clinic. The same procedure — same implant brands, same clinical standards — costs between £350 and £750 across Europe. That difference is why hundreds of thousands of UK patients travel abroad for dental implants every year, and why choosing the right destination matters enormously.

This guide compares the most popular European destinations for dental implants from a UK patient’s perspective: flight times, price ranges, regulatory environment and what each country does well. It is written specifically for patients travelling from the UK — not a generic global guide, but a practical comparison of the destinations that make sense from British airports.

Price comparison: dental implants abroad vs the UK

Country	Single implant	All-on-4 per arch	Flight from London	EU regulated
UK	£2,000–£3,500	£10,000–£20,000	—	✓
Spain	£600–£900	£5,500–£8,000	~2h 30m	✓
Hungary	£500–£800	£3,500–£6,500	~2h 30m	✓
Poland	£450–£750	£3,000–£5,500	~2h 30m	✓
Turkey	£350–£600	£2,500–£4,500	~4h	✗
Bulgaria	£300–£500	£2,200–£4,000	~3h 30m	✓

Prices are indicative ranges based on 2025–2026 market data and include implant fixture, abutment and crown for single implants. All-on-4 prices include four implants and same-day provisional prosthesis. Always request an itemised quote before booking.

Turkey — the most searched destination for UK patients

Turkey is the most popular dental tourism destination for UK patients by search volume, and the reason is straightforward: it offers the lowest prices in Europe, with single implants from around £350 and All-on-4 packages from £2,500. Istanbul and Antalya have developed a highly organised medical tourism infrastructure, with large specialist implant centres, English-speaking staff and package deals that include airport transfers and hotel accommodation.

The considerations for UK patients are worth understanding clearly. Turkey is not an EU member, which means it operates under its own national healthcare regulations rather than EU directives on patient safety and cross-border care. Recourse in the event of complications is more complex than within the EU. Flight time from London is around 4 hours. For straightforward single implant cases where the patient has done thorough research on the specific clinic, Turkey can represent excellent value. For complex cases — full arch restoration, significant bone loss, multiple implants — the regulatory environment and aftercare access are factors worth weighing carefully.

Hungary — Europe’s original dental tourism destination

Budapest has been the centre of European dental tourism for over 30 years and has earned the nickname “Dental Capital of Europe” for good reason. Hungarian dentists train for five to six years and must maintain annual continuing education requirements. The country operates under EU healthcare regulations, which means UK patients have access to the EU cross-border healthcare directive in the event of complications.

Prices have risen significantly over the past decade as demand has increased and the Hungarian economy has grown — single implants now start from around £500, which is competitive but no longer dramatically cheaper than Spain or Poland. Flight time from London is approximately 2 hours 30 minutes, with direct services from multiple UK airports. Budapest itself is an excellent short-break destination, which makes combining treatment with a city break straightforward.

Poland — EU standards, short flights, competitive prices

Poland has become an increasingly popular choice for UK patients, particularly those in the north of England and Scotland for whom direct flights to Warsaw or Krakow are convenient. Polish dentists train to EU standards and many have completed specialist postgraduate study in the UK or Germany. Clinics in Warsaw and Krakow are well-equipped with digital planning tools and 3D scanning technology comparable to any UK practice.

Single implants start from around £450, and the combination of EU regulation, short flight times and modern facilities makes Poland a strong choice for patients who prioritise regulatory security alongside value. The main consideration compared to southern European destinations is the absence of a Mediterranean climate — Poland works well as a treatment destination but offers less as a recovery break.

Spain — the best combination of quality, proximity and lifestyle

Spain sits at a different point in the value equation to Turkey or Bulgaria. It is not the cheapest option, but it offers something none of the lower-cost destinations can match: full EU regulatory environment, direct flights from nine UK airports in under 2 hours 30 minutes, and the combination of dental treatment with a genuinely outstanding short break destination.

For patients considering full arch restoration — All-on-4 or similar — Spain’s advantage is particularly clear. The saving versus UK prices remains substantial (£6,480 per arch at Asensio versus £15,000 or more in the UK), the regulatory framework is fully EU-compliant, aftercare coordination with UK-based dentists is straightforward, and the patient recovers in Valencia rather than Warsaw or Istanbul. For patients who need two trips — the initial surgery and the definitive prosthesis fitting — the appeal of returning to Valencia is obvious.

At Asensio Advanced Dentistry in Valencia, a single dental implant costs from £750 and a complete All-on-4 arch restoration costs £6,480, performed by Dr. Lucía Asensio Romero — a specialist in implantology and oral surgery with over 30 years of experience and more than 5,000 implants placed. The clinic holds ISO 9001 certification from AENOR and uses exclusively Nobel Biocare and Klockner implant systems.

What to check before booking dental implants abroad

Regardless of destination, these are the questions every UK patient should ask before committing to treatment:

• Which implant brand is used? Nobel Biocare, Straumann and Klockner are globally recognised brands with long-term clinical data. Avoid clinics that are vague about implant systems.
• Is the price itemised? Make sure the quote separately lists the implant fixture, abutment, crown, consultation and any CT scanning costs. Many clinics quote only the implant post.
• What guarantee is provided? Reputable clinics provide a written guarantee of at least five years on the implant-crown complex, clearly stating what is covered.
• Is the country EU-regulated? EU membership means access to the cross-border healthcare directive in the event of complications and consistent professional standards.

• Related guides

  • Dental implants abroad at Asensio — full overview of implant treatments and prices
  • All-on-4 dental implants abroad — full arch rehabilitation with same-day fixed teeth
  • How dental tourism in Spain works — planning your trip to Valencia
  • Full treatment price list — all procedures and prices at Asensio
  • Our dental guarantee — what’s covered at Asensio

All-on-4 dental implants cost in Spain is one of the most common questions from UK patients considering full-arch rehabilitation abroad. At Asensio Advanced Dentistry in Valencia, a complete All-on-4 treatment — including extractions, four Nobel Biocare or Klockner implants, abutments and same-day fixed provisional teeth — costs £6,480 per arch, compared to £15,000 or more at most UK clinics.

The price difference is not explained by lower material quality or less experienced clinicians. Spain operates under EU healthcare regulations, uses the same implant brands available in British clinics, and maintains internationally audited quality standards. The difference comes from lower operating costs and a different fee structure — savings that are passed directly to the patient.

All-on-4 dental implants abroad at Asensio are placed under the direction of Dr. Lucía Asensio Romero, a specialist in implantology and oral surgery with over 30 years of experience and more than 5,000 implants performed. The clinic holds ISO 9001 certification from AENOR, independently auditing clinical processes and facilities.

All-on-4 dental implants cost in Spain vs the UK

The cost of All-on-4 treatment varies significantly between countries. The table below compares the typical costs for UK patients choosing treatment at Asensio in Valencia versus staying in the UK, including an estimate of travel and accommodation costs for a two-trip treatment.

Treatment	Asensio Spain	Typical UK cost	Saving
All-on-4 single arch	£6,480	£15,000+	£8,500+
Both arches	£12,960	£28,000+	£15,000+
Estimated travel + accommodation (2 trips)	~£600–£900	—	Net saving still £7,500+

All prices include extractions of remaining teeth, four implants with abutments, and fixed provisional teeth fitted on the same day as surgery. The definitive prosthesis is placed at the second visit after osseointegration. View the complete breakdown on our dental treatment prices page.

What is included in the All-on-4 price at Asensio?

The £6,480 price per arch at Asensio Advanced Dentistry covers the full treatment from surgery to provisional restoration. There are no hidden fees for standard cases

Related guides

• All-on-4 dental implants abroad — full overview of the treatment
• How to clean All-on-4 implants — daily routine and professional care
• Complex All-on-4 case study — severe bone atrophy resolved at Asensio