Same-Day Crowns: How CEREC Works

What CEREC is

CEREC (Chairside Economical Restoration of Esthetic Ceramics) is a chairside CAD/CAM system that lets dentists design, mill, and fit a ceramic crown in a single visit — typically 60–90 minutes total.

The process, step by step

Step 1 — Prepare the tooth (20–30 min)

Remove decay, shape the tooth to accept a crown.

Step 2 — 3D scan (3–5 min)

A wand scans the tooth; no impressions, no gagging.

Step 3 — Design (10–15 min)

Software proposes a crown shape. Your dentist refines size, contact points, and occlusion on-screen.

Step 4 — Mill (10–15 min)

A block of ceramic is milled into the crown by an in-office machine.

Step 5 — Glaze and cement (15–20 min)

Crown is glazed in a ceramic furnace, then bonded to the tooth.

Total: about 90 minutes of chair time. No second appointment, no temporary crown, no waiting for a lab.

What CEREC does well

• Single-tooth crowns on molars and premolars
• Inlays and onlays
• Veneers (selected cases)
• Emergency single-tooth restorations when a crown fractures

What CEREC does less well

• Front-tooth aesthetics: the best veneers and front crowns still benefit from a master ceramist layering porcelain by hand. CEREC front teeth are very good but the ceiling is lower than lab-made.
• Full arches: volume of work better handled in stages
• Translucent / complex shade matching: improving but not yet at the level of a skilled hand-layered restoration

The ceramic types

• Lithium disilicate (E.max): strong, aesthetic, handles most cases. This is CEREC's workhorse material.
• Zirconia: stronger than E.max, slightly less translucent, perfect for back teeth
• Feldspathic porcelain: most aesthetic but not CEREC's strength

Cost in Dubai

Typically AED 2,800–5,500 for a single CEREC crown — comparable to traditional lab crowns, but faster. Some clinics charge a premium for the same-day convenience.

Long-term outcomes

10-year survival of CEREC-milled crowns: ~92–95% (vs ~90–93% for traditional lab crowns). Performance is equivalent to or better than traditional methods in most long-term studies.

When to choose CEREC

• A front premolar that fractured and needs immediate restoration
• You travel for work and can't commit to a 2-week process
• You dislike temporary crowns
• A molar needs a crown and front-tooth aesthetics aren't involved

When to choose a traditional lab crown

• Front teeth where a master ceramist will layer porcelain
• Complex cases with multiple units
• Cases that benefit from a trial smile phase

Practical decision guide

General dental decisions should preserve healthy tooth structure whenever possible. A good plan moves from diagnosis to the least-invasive durable treatment, then to prevention so the same problem does not repeat.

Check this first

• X-rays, pulp vitality, crack lines, gum pocketing, bite contacts, and how much natural tooth remains.
• Whether the problem is active disease, old restoration failure, trauma, wear, or a cosmetic concern.
• Whether a filling, onlay, crown, root canal, extraction, or monitoring is the right next step.

When to book sooner

• Pain wakes you at night, lingers after hot or cold, hurts on biting, or comes with swelling.
• A crown or filling falls out, a tooth cracks, or a sharp edge is cutting the tongue or cheek.
• You notice pus, fever, spreading swelling, or difficulty opening, swallowing, or breathing.

Topic-specific notes

• For material choices, ask why that material fits the tooth location, bite force, aesthetics, allergy history, repairability, and expected lifespan.

Questions to ask at the appointment

• What is the diagnosis, and what evidence supports it on the x-ray or clinical exam?
• What is the smallest treatment that solves the problem predictably?
• What failure signs should I watch for after treatment?

Dubai patient note

If insurance is involved, ask whether pre-approval is required, what codes will be submitted, and what alternatives are clinically acceptable if coverage is limited.

References

• Sirona Dental Systems — Clinical outcomes
• Journal of Dentistry — CAD/CAM crown longevity