Dental Conditions

Stained or discoloured teeth

Surface staining and internal discolouration are different problems with different solutions — and getting that distinction right determines whether whitening works for you.

Two kinds of stain

Extrinsic — Surface Staining

Sits on the outside of the enamel, accumulated from coffee, tea, red wine, and tobacco. Responds well to professional cleaning and whitening.

Intrinsic — Internal Discolouration

Sits within the tooth structure, from trauma, certain medications such as tetracycline taken during development, excess fluoride, or simply the natural yellowing of dentine with age. Responds poorly or not at all to bleaching.

Treatment options

Professional Whitening

Fast and effective for extrinsic staining and mild intrinsic discolouration, with results lasting months to years depending on your habits and whether you maintain with take-home trays.

Porcelain Veneers

A long-lasting solution for severe discolouration that resists whitening — particularly tetracycline staining and single dark teeth following trauma. Lasts ten to fifteen years and beyond.

Composite Bonding

A more conservative and less expensive option for isolated discoloured spots or individual teeth, though composite itself picks up stain over time.

Why some teeth do not whiten

A single dark tooth following an old injury is discoloured from the inside, usually because the nerve died. External bleaching does very little; internal bleaching after root canal treatment, or a veneer or crown, is what works.

Existing dental work is another consideration. Crowns, veneers, and composite fillings do not change colour when you whiten. If you have restorations in the smile zone, whiten first and then replace them to match — doing it the other way round leaves you with mismatched teeth.

How we treat it

The treatments that address this.

Discolouration treated

Both of these patients had discolouration that whitening alone could not lift. Individual results vary.

Before — worn, shortened teeth, the upper and lower front edges meeting almost flat and the lips drawn close together
Before
After — porcelain crowns and veneers on both arches, the teeth restored to their full length and the bite opened
After

Full Mouth Rehabilitation with Crowns and Veneers

Upper & Lower Arches — no implants

Porcelain crowns and veneers across both arches, rebuilding teeth that had worn down over years. Restoring the height of the bite returns comfortable function and supports the proportions of the lower face.

Before — upper front teeth uneven in shade and length, with visible wear along the edges
Before
After — eight porcelain veneers and two crowns across the upper arch, even in shade, length and alignment
After

Eight Veneers and Two Crowns

Upper arch

Eight porcelain veneers and two crowns across the upper arch, evening out shade, length and alignment while keeping the lower teeth as they were.

See all 23 cosmetic cases

Concerned about your symptoms?

Book an assessment and we will tell you honestly what whitening will and will not achieve for your teeth. Call (905) 479-7777.