All-on-4 Dental Implants

What Is All-on-4?

All-on-4 is a full-arch dental restoration technique that replaces all upper or lower teeth using just four dental implants to support a fixed prosthesis (permanent denture).

The technique was developed by Portuguese dentist Paulo Malo in the 1990s and has extensive clinical research supporting its effectiveness.

Source: Malo P, et al. Clinical Implant Dentistry and Related Research (2003); AAOMS patient materials (PDF)

Who Is a Candidate for All-on-4?

All-on-4 may be suitable if you:

• Are missing all or most teeth in an arch (or have failing teeth requiring extraction)
• Have sufficient bone density in the anterior and posterior regions (determined by CT scan)
• Want a fixed (non-removable) solution rather than traditional dentures
• Are in good general health with controlled medical conditions
• Have healthy gums or successfully treated periodontal disease
• Do not have active oral infections
• Are non-smokers or willing to quit (smoking significantly reduces success rates)

Not Recommended For

• Severe bone loss throughout jaw (may require All-on-6 or traditional individual implants with grafting)
• Uncontrolled diabetes or immune disorders
• Active cancer treatment or recent radiation to head/neck
• Uncontrolled bruxism (teeth grinding) without willingness to wear night guard

Source: AAOMS clinical guidelines, Academy of Osseointegration treatment protocols

The All-on-4 Procedure: Step by Step

Phase 1: Consultation and Planning (1-2 visits)

1. Initial evaluation: Oral exam, medical history review, discussion of goals
2. 3D imaging: CBCT (cone beam CT) scan to assess bone density and anatomy
3. Treatment planning: Digital planning of implant positions, angulations, and prosthesis design
4. Medical clearance: May be required if you have significant health conditions

Phase 2: Surgery Day

1. Anesthesia: Local anesthesia, IV sedation, or general anesthesia (patient choice + provider recommendation)
2. Extractions (if needed): Removal of any remaining teeth in the arch
3. Implant placement: Four implants surgically placed according to pre-planned positions (2-3 hours typically)
4. Abutment attachment: Connector pieces attached to implants
5. Temporary prosthesis: Same-day temporary teeth (acrylic) attached to implants

Note: You leave with functional teeth the same day in most cases. "Teeth in a Day" is a common marketing term for this protocol.

Phase 3: Healing Period (3-6 months)

• Osseointegration: Implants fuse with jawbone over 3-6 months
• Temporary prosthesis worn: Functional but less durable than final restoration
• Soft diet recommended: Avoid hard, sticky, or very chewy foods
• Follow-up visits: Check healing progress, adjust bite if needed

Phase 4: Final Restoration

1. Impressions and bite records: Precise measurements taken once implants fully integrated
2. Final prosthesis fabrication: Custom-made bridge (zirconia, acrylic, or hybrid materials)
3. Delivery appointment: Temporary prosthesis removed, final restoration attached
4. Bite adjustment: Fine-tuning for comfort and proper occlusion

Source: AAOMS surgical protocols, Academy of Osseointegration treatment guidelines

All-on-4 vs. Traditional Full-Arch Implants

Clinical outcomes: Malo et al. studies cited in Implant Dentistry 2015 and PMC systematic review

Success Rates and Longevity

Factors That Affect Success

• Smoking: Reduces success rate by 10-15%, increases complications
• Diabetes control: Well-controlled diabetes has similar outcomes to non-diabetics; uncontrolled increases failure risk
• Oral hygiene: Poor hygiene leads to peri-implantitis (implant gum disease), major cause of late failures
• Bruxism: Teeth grinding/clenching can damage prosthesis; night guard recommended
• Surgeon experience: Outcomes improve with surgeon experience and case volume

Recovery and Aftercare

Immediate Post-Op (First 2 Weeks)

• Pain management: Prescription pain medication typically needed for 3-5 days, then OTC
• Swelling: Peaks at 48-72 hours, ice packs help during first 48 hours
• Diet: Soft foods only for 2 weeks (smoothies, yogurt, mashed potatoes, scrambled eggs, soup)
• Activity: Avoid strenuous exercise for 1 week
• Work: Most people take 3-7 days off work

Healing Phase (3-6 Months)

• Diet progression: Gradually introduce firmer foods, avoid very hard/sticky items
• Oral hygiene: Gentle brushing, water flosser, antimicrobial rinse as directed
• Temporary prosthesis care: May require adjustments if gums heal unevenly
• Follow-ups: Typically at 1 week, 1 month, 3 months, 6 months

Long-Term Maintenance

• Professional cleanings: Every 3-6 months (more frequent than natural teeth)
• Home care: Brush twice daily, floss/water floss daily around implants and under bridge
• Night guard: If you grind teeth, protect prosthesis with custom guard
• Annual check-ups: X-rays to monitor bone levels, prosthesis inspection

Cost Information

Complete All-on-4 cost breakdown by prosthesis material →

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