All-on-4 Dental Implants Thornhill: A Full Arch of Teeth, Supported by Just Four Implants
All-on-4 dental implants in Thornhill offer a way to walk in with failing teeth and leave the same day with a full, functional smile.
At MiNa Family Dentistry, 7191 Yonge St Unit 205, Thornhill, Dr. Mehdi Adibrad performs All-on-4 procedures with the surgical precision that comes from an MSc in periodontics and over two decades of implant and periodontal surgery experience. This page covers what the All-on-4 procedure involves, who it suits, how it compares to conventional dentures, what recovery looks like, and what you can expect to pay in Ontario.
What Are All-on-4 Dental Implants?
All-on-4 is a full-arch tooth replacement system. Rather than placing one implant per missing tooth, four strategically positioned titanium implants support an entire arch prosthesis — either upper or lower. The two rear (posterior) implants are angled at up to 45 degrees into denser bone at the front of the jaw. This angulation distributes chewing forces more evenly, reaches bone that is typically denser and more available, and avoids the sinuses in the upper jaw in most cases — eliminating the need for a sinus lift.
Critically, the angled implant design allows immediate loading, meaning a temporary prosthesis can be attached on the same day as surgery. The result is a fixed, non-removable set of teeth that looks, feels, and functions far more like natural teeth than a conventional denture.
How All-on-4 Compares to Conventional Dentures
Patients who have worn dentures for years often do not realize how different an implant-supported solution feels until they experience it. The cost difference between All-on-4 and a conventional denture is real, but so is the difference in quality of life — patients consistently report that eating, speaking, and smiling feel natural in a way that dentures simply cannot replicate.
| Factor | All-on-4 Implants | Conventional Denture |
|---|---|---|
| Fixed or removable | Fixed — does not come out | Removable |
| Bone preservation | Yes — implants stimulate the jawbone | No — bone loss continues |
| Chewing efficiency | 80–90% of natural bite force | 20–25% of natural bite force |
| Adhesive required | Never | Often |
| Taste and sensation | Full palate exposed (upper arch) | Palate often covered, reducing taste |
| Lifespan of prosthesis | 15–20 years (implants permanent) | 5–8 years before relining/replacement |
| Face shape preservation | Yes | No — bone loss causes facial collapse |
| Cost per arch (Ontario) | $20,000–$30,000 | $1,500–$3,000 |
The All-on-4 Procedure Step by Step
Consultation and Treatment Planning
Your first appointment involves a thorough examination including a 3D cone beam CT scan. This imaging maps the bone volume and density throughout your jaw and identifies the precise position for each implant. Dr. Adibrad uses this data to plan the entire surgery digitally before touching a tool. You will also discuss the design of your prosthesis — tooth shape, colour, and size are all customized.
Preparing the Mouth and Implant Surgery
Any remaining failing teeth that need to be removed are extracted. In many All-on-4 cases, extractions, implant placement, and temporary prosthesis attachment happen in a single surgical session. Surgery is performed under local anaesthetic and, in many cases, IV sedation for patient comfort. The procedure typically takes two to four hours per arch. Dr. Adibrad places the four implants at precisely planned locations and angles, anchoring into anterior bone that is typically denser even in patients who have experienced significant bone loss — which is why most All-on-4 patients do not need bone grafting.
Same-Day Temporary Teeth
Within a few hours of surgery, a temporary prosthesis is attached to the implants. You leave the clinic with a full set of functional teeth that lets you eat soft foods and speak normally while the implants heal.
Healing and Final Prosthesis
Over the next three to six months, the implants fuse with the jawbone. Most patients resume normal activity within a few days, though soft foods are important for the first eight to twelve weeks. Once osseointegration is confirmed, your final permanent prosthesis — usually zirconia or an acrylic-titanium hybrid — is fabricated and fitted. It is designed to last 15 to 20 years with proper care.
Who Is a Candidate for All-on-4?
All-on-4 is appropriate for patients who are fully edentulous and wearing dentures, patients whose remaining teeth are failing due to advanced decay or gum disease, and patients who want a permanent upgrade from uncomfortable or ill-fitting dentures.
Patients with severe bone loss throughout the entire jaw may still qualify with additional bone grafting or a modified implant plan. Dr. Adibrad will assess this thoroughly at your consultation.
- Sufficient bone in the anterior jaw — most patients qualify due to the angled implant design
- Well-controlled systemic health, including diabetes if applicable
- Non-smoking or willingness to stop smoking during healing
- Commitment to post-operative care and follow-up appointments
Recovery: What to Expect
Most All-on-4 patients are surprised by how manageable the recovery is. Swelling and soreness peak in the first three days and are managed with cold packs and pain relievers. Many patients return to desk work by days four to seven. A soft diet continues through weeks two to eight while the implants heal. Follow-up appointments confirm bone integration is progressing at months two through six, and final prosthesis fitting typically occurs between months three and six.
What Does All-on-4 Cost in Thornhill, Ontario?
All-on-4 dental implants in Thornhill typically cost between $20,000 and $30,000 per arch in Ontario. A full mouth — upper and lower — is $40,000 to $60,000. This is a significant investment, but it is a one-time expense for a permanent, functional set of teeth. MiNa Family Dentistry offers financing options to spread the cost over time.
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MiNa Family Dentistry
7191 Yonge St Unit 205, Thornhill, ON L3T 0C4
(289) 597-7191
Mon–Thu 9:00 AM–6:00 PM | Fri 9:00 AM–3:00 PM