Whiten Before Bonding?

Why Whiten Before Bonding or Veneers?

Whitening comes first because composite bonding and porcelain veneers are colour-matched to your teeth on the day they are made, and neither material responds to whitening afterwards. If you bond first and whiten later, your natural teeth lighten and the bonded teeth stay as they were, so they end up looking darker than their neighbours.

Whitening first means:

• Your shade is chosen once. The bonding or porcelain is matched to the lighter colour you want to keep.
• The result blends. Bonded edges and veneers sit alongside natural teeth that have had the same colour change.
• You avoid redoing work. Fixing a mismatch later usually means resurfacing or replacing bonding, or remaking veneers.

It isn't compulsory. Some people are happy with their natural colour, and that is a perfectly good choice. The point is to decide about colour before anything is bonded on, not after.

Why Don't Bonding and Porcelain Whiten?

Whitening gels work by releasing oxygen that passes into the enamel and dentine and breaks down the coloured molecules inside. Natural teeth are porous enough for that to happen.

Composite resin and dental porcelain aren't. Their colour is built into the material when it is made:

• Composite is a resin filled with fine glass particles, layered in chosen shades. Whitening gel may clean surface stain off it, but it can't change the colour underneath.
• Porcelain is fired in a dental laboratory and glazed. Its colour is fixed for good, which is why it resists staining so well.

The same applies to existing fillings and crowns on your front teeth. If you whiten around them, they will stay the same colour. It is worth knowing which teeth already have restorations before you start, because some may need replacing to match your new shade.

How Is Your Shade Matched?

Matching tooth colour is part science, part craft. Natural teeth aren't one flat colour: they are usually a little warmer near the gum, more translucent at the biting edge, and vary from tooth to tooth.

When we match bonding or veneers, we look at:

• Shade, using a shade guide in natural light, with photographs taken for reference
• Translucency, especially at the edges, so bonded teeth don't look opaque or flat
• Surface texture and gloss, which change how light reflects and how bright a tooth appears
• Your skin tone and lips, so the overall result looks natural on you rather than just white

For bonding, we often place a small trial button of composite on the tooth before we start, so you can see the match in the mirror. For veneers, the shade is agreed with you and passed to the laboratory with photographs. Both approaches rely on your natural teeth being at their final, stable colour.

How Long to Wait Between Whitening and Bonding?

We usually wait about two weeks after you finish whitening before bonding or taking the final shade for veneers. There are two reasons.

The colour needs to settle. Straight after whitening, teeth are slightly dehydrated and can look whiter than they really are. Over the following days they rehydrate and the colour settles back a little. Matching too early risks bonding that looks too white once the teeth have settled.

The bond needs to be strong. Whitening leaves residual oxygen in the enamel for a short time, which can interfere with how well composite bonds to the tooth. Waiting lets that clear, so the bonding adheres as it should.

In practice, the timeline often looks like this:

1. Consultation and planning, including photographs and a record of your starting shade
2. Whitening at home with custom trays, typically over two to four weeks
3. A settling period of around two weeks
4. Bonding or veneer appointments, matched to your new shade

If you have sensitivity during whitening, we may slow the pace, which can add a little time. Results vary from person to person.

What Does Whitening Involve at Comely Bank Dental?

At our Edinburgh practice we use professional home whitening, which is from £450 and includes custom-made trays and whitening gel. In the UK, whitening may only be provided by a dentist or a registered dental professional working to a dentist's prescription, so it starts with a check of your teeth and gums.

The steps are:

• An assessment to make sure your teeth are healthy enough to whiten, and to note existing restorations
• Digital scans of your teeth with our iTero scanner, used to make your trays
• Fitting and instructions, including how much gel to use and how long to wear the trays
• A review once you have reached your shade, before any bonding or veneers are planned

Some people notice temporary sensitivity during treatment. It usually settles once whitening stops, and a toothpaste for sensitive teeth used beforehand often helps. Whitening isn't suitable during pregnancy or breastfeeding, or while there is untreated decay or gum disease.

Once you have trays, you can keep them for top-ups to maintain your shade in future.

What If You Don't Want to Whiten?

That is completely fine. Whitening is optional, and many people are happy with their natural colour. In that case:

• Bonding is matched to your current shade. It will look natural alongside your own teeth.
• You should decide now whether you'll want whitening in future. If you might, it makes sense to whiten first, because whitening later will leave the bonding darker than your natural teeth.
• Veneers can lighten the teeth they cover, within reason. If only the front teeth are being veneered, though, a large jump in shade can look out of place next to the unveneered teeth further back, so we keep the change believable.

If you're unsure, it can help to see the difference. Photographs and a trial smile can show how a lighter or natural shade would look before anything is committed.

Can You Whiten If You Already Have Bonding or Veneers?

Yes, but plan for what happens next. Whitening will lighten your natural teeth and leave existing bonding, veneers, crowns and fillings unchanged.

The usual approach is:

1. Whiten your natural teeth to the shade you want.
2. Wait for the colour to settle.
3. Resurface or replace the existing bonding to match. Composite can often be refreshed with a new outer layer rather than fully replaced.
4. If you have porcelain veneers or crowns, decide whether replacing them is worthwhile, or whether whitening should be limited to keep a match.

We'll tell you before you start which restorations would no longer match, so there are no surprises. Sometimes the honest answer is that whitening isn't worthwhile because it would mean replacing good work you're otherwise happy with.

How Is the Order of Treatment Planned?

Every plan starts with a healthy foundation and works towards the details. For patients we see from Stockbridge, Inverleith and across Edinburgh, a typical sequence looks like this:

1. Health. We treat any decay or gum problems first and arrange a hygiene visit so your teeth are clean and your gums settled.
2. Position. If teeth are crowded or out of line, we discuss straightening them first, as it often reduces the bonding or veneer work needed.
3. Colour. Whitening, then the settling period.
4. Shape. Bonding or veneers matched to your final shade.
5. Protection and maintenance. A night guard if you grind, regular hygiene visits, and whitening top-ups if you'd like them.

For larger cases, smile design and a trial smile may come before any of this, so you can agree the end result first.

Each step is set out in a written treatment plan with every fee agreed before treatment starts. Members of our dental plan save 10% on most private treatment.

Questions

This guide is general information, not a diagnosis. A dentist needs to examine you to say what is right for your teeth.