Making Whitening Last

How Long the Result Lasts

Expect a year or more, and in some cases a good deal longer. The main variables are your diet, smoking and your cleaning routine. Whitening works on the pigment inside the enamel, and that lightening is not something that washes off. Instead, coffee, tea, wine and the rest gradually lay down new pigment, and over months the colour edges back towards where it began.

Topping up is quick because you are starting from a lighter base. Your trays plus a little gel for a few evenings usually restores the colour, and the routine described further down means you will reach for them less often.

We note your shade before treatment and again at your review, which gives you a reference point; Enlighten patients also have the guaranteed B1 to measure against. When you notice your teeth sliding back towards the starting shade, a top-up is due.

Top-Ups with Your Own Trays

The trays are the bespoke part of your whitening, so treat them well: store them in the case, clean them with a soft brush and cool water, and keep them away from heat, which can distort them. We supply top-up gel at the practice. A short run of a few nights is normally enough, and many people plan one ahead of a holiday, a family celebration or a work event where photos will be taken.

Use the gel exactly as shown at your fitting. Leaving trays in longer than advised barely speeds things up and is the most common cause of sensitivity. New crowns, bonding or fillings can change how the trays fit; if that happens, a quick iTero Element scan gives us what we need to make replacements.

The Main Causes of New Stain

• Coffee, tea and red wine, all high in tannins and colour
• Curries and turmeric, soy sauce, balsamic vinegar and rich tomato sauces
• Blueberries, blackcurrants, beetroot and dark juices
• Cola and similar fizzy drinks, which add acid to the colour
• Cigarettes, cigars and vapes

It helps to know there are two kinds of stain. One sits on the surface, in the enamel and the plaque layer over it, and a toothbrush and a professional clean can shift it. The other works its way into the enamel over years, and that is what whitening gel targets. Acid makes things worse on both fronts, because it softens and roughens the surface so pigment grips more easily. You do not need to cut anything out. Water after a dark drink, or a straw for cold ones, is usually enough to tip the balance.

A Daily Routine That Protects the Shade

• After coffee, tea or wine, take a mouthful of water and swill it round
• Use a straw for iced coffee, cola and other cold dark drinks, so they skip the front teeth
• After something acidic, wait about an hour before brushing, as softened enamel wears more easily
• Brush morning and night with a fluoride toothpaste and clean between the teeth daily; pigment latches onto plaque before it reaches enamel
• If you smoke or vape, cutting down helps more than anything else on this list
• Rinse trays and retainers after use and keep coloured drinks away from them, since they discolour too

Whitening toothpastes can play a small part. Their gentle abrasives or stain-loosening agents lift a little surface staining between professional cleans, yet they leave the natural shade of the tooth unchanged, and the grittier products can thin enamel if used daily. A couple of times a week is plenty.

Hygiene Appointments

Even careful brushing leaves stain in the places a brush struggles to reach, between the teeth and at the gum margin, and a hygiene visit clears it. Airflow air polishing directs a fine mix of warm water, air and powder at the teeth, lifting plaque and staining without scraping, and many patients prefer it to a conventional scale and polish. Our hygienist, Stefanie Goodall, can be booked directly, with no need to see a dentist beforehand. A Classic Smile Clean is £99 and a Diamond Smile Clean with Airflow is £134, and our dental plans include them.

Most people do well on a three- to six-monthly cycle. Booking a clean shortly before a top-up means the gel meets bare enamel and lightens more evenly.

Fillings, Bonding, Crowns and Veneers

Whitening gel has no effect on restorations, so tooth-coloured fillings, bonding, crowns and veneers stay exactly as they were while the natural teeth around them lighten. On the front teeth, that makes keeping everything in step the priority. Porcelain and ceramic hold their colour very well. Composite is slightly more porous and slowly takes on stain, so bonded teeth gain most from the routine above and from being polished at each hygiene visit. If a filling or a bonded edge looks darker after a top-up, it can normally be refreshed in a short appointment. And if bonding or veneers are on your wish list, whiten before they are made and give the colour around two weeks to stabilise, so they are matched to the brighter shade; our guide to whitening before bonding explains why.

Whitening a Second Time

Repeat whitening is safe under dental supervision, and in practice most people only ever need the odd top-up rather than a full second course. If it has been a few years, or the trays have gone missing or stopped fitting, a short consultation with Dr Pei is the place to start: a look at your teeth and gums, a check that nothing needs treating first, and a realistic view of the shade you can reach. Boutique home whitening is £350, or £315 on a dental plan, and Enlighten is £650, or £585 on a plan.² Every Invisalign package and every composite bonding package also comes with Boutique whitening. UK law allows only registered dental professionals to whiten teeth, so a salon or kiosk offer should be declined.

Questions

This guide explains the options in general terms. Only an examination can tell you which of them suits your own teeth.