Our website is currently undergoing some changes and we apologies for any inconvenience. If you are struggling to view any information please do not hesitate to contact us »

How to use your Whitening GelsInserting gel into tray

Whitening your teeth is usually a straightforward process, as long as you use the correct products and follow the correct advice.

To get good results it’s essential to have properly fitting whitening trays – you can’t get these from the internet, or from your local beautician: they need to be professionally made. Without correctly fitted trays the whitening process can be much less effective.

You also need to use the best whitening gels – everybody’s different, and one type of gel may give you better results than other types.

So, assuming you’ve been to see us, we’ve found the best system to whiten your teeth and made you a set of perfectly-fitted trays, this is what you need to know:………


Teeth whitening gels are used to lighten the colour of natural teeth. Formulations containing hydrogen peroxide (HP) are for shorter day-wear use, while those containing carbamide peroxide (CP) are for longer (usually overnight) use. Legally, these products can only be dispensed by or on the order of a dental professional. Before any whitening procedure, you will need a consultation with a qualified dentist to ensure no underlying oral or health issues exist.


Current research has not tested the possible effects of whitening procedures on all patient types. Although problems are unlikely to occur, we recommend the following should not use whitening products:

• Anyone with known or suspected sensitivity to carbamide peroxide or the glycerine-based whitening gel

• Pregnant or breast-feeding mothers

• Anyone currently being treated for a serious illness (for example, anyone who may be immuno-compromised)

• Children under the age of 13 years


• If  a significant amount of gel is swallowed contact us for advice, contact a Poisons Information Centre or your doctor at once.

• If a large quantity (over 25% of the gel in the syringe) is swallowed, immediately drink a glass of water. Do not induce vomiting.

• If gel gets into your eyes, hold your eyelids apart and flush the eye continuously with running water for at least 15 minutes.

• If clothing, skin or hair contact occurs, remove any contaminated clothing and flush any affected skin or hair with running water.


• Keep whitening products away from clothing.

• Keep all whitening products  out of reach of children.


Keep the whitening gel away from teeth that are hypersensitive (for example, any tooth that is already sensitive to temperature)

The whitening syringes may be under slight pressure, so remove the cap safely.

• Whitening gels are irritant and there is risk of serious damage if the gel is in contact with your eyes.

• Whitening products may be harmful if swallowed.

• NEVER use household bleaching products to whiten your teeth

• Direct heat or hot water may cause permanent damage to the tray material


• Floss and brush your teeth.

• In an anti-clockwise motion, twist off the clear plastic cap from the syringe.

• Twist the mixing tip clockwise to lock it onto the end of the syringe.

• Place a small amount of gel in each tooth compartment in the tray. The gel drop should be the size of a match head, depending on the size of your teeth. Important: Overloading trays with gel may cause temporary gum irritation.

• Place the tray with gel in your mouth. As you insert the tray, be careful not to push the gel out of the tray. Bubbling within trays is normal.

• Use extra care to avoid getting gel on your gums. If excess gel is squeezed out of the tray it is often best to remove the tray, clean your teeth and tray and start again – using less gel

• Once gel has been placed in the trays, remove the mixing tip from the gel syringe and replace the clear plastic cap. This ensures ingredients in each side of the barrel stay separate for maximum effectiveness.

• After whitening, rinse the trays with cold water. Use a toothbrush to remove any residual gel. Place the trays in their storage case and store in a cool dry place.

• Rinse and brush teeth to remove excess gel.


• Don’t eat, drink or smoke while wearing your whitening trays.

• It is normal to see dark colours in the trays where you have amalgam fillings.

• The area of the tooth closest to the gums may take longer to lighten than the biting edge. It will also remain the darkest part of the tooth.


Concentration/ Formula and Recommended Wear Times:

NiteWhite ACP (10% or 16% CP)  Overnight or 4-6 Hours

Opalescence (10% CP), Overnight or 4-6 Hours

Polanight (10% CP), Overnight or 4-6 Hours

Optimal results with CP-containing gels are usually found within 1 – 2 weeks


DayWhite ACP Day-Wear (7.5% HP) 30 minutes, twice a day

Optimal results with HP-containing gels are usually found within 2 weeks

NOTE: (CP: carbamide peroxide HP: hydrogen peroxide)


Results can and do vary from person to person.  The anatomy of your teeth, your age, the condition of your teeth, the standard of your oral hygiene and the starting shade of your teeth can significantly affect the results that can be achieved.

• You should have realistic expectations about the final results. Most of the time we can give you a fairly accurate idea of what to expect. However, nothing can be guaranteed, and some teeth can be very resistant to the whitening procss.

Note that crowns, veneers, fillings, dentures and other dental restorations will not whiten and may require replacement following the whitening procedure.

• Your final teeth shade may not be achieved until about 2 weeks after completion of your whitening treatment.

• Although most patients will achieve great results within 2 weeks, you should consult our clinical team about continuing to use whitening systems if your results are not satisfactory.


• Although there is little evidence of a problem, it may be best to avoid staining foods, drinks and tobacco for 30 minutes after each treatment.

• Continue good oral hygiene; using an electric tooth brush will often help to keep results for longer.

• Store any remaining whitening gel in a cool dry place, out of direct sunlight, for later use. Do not freeze.


Adverse effects that may be associated with the use of a whitening product containing carbamide peroxide or hydrogen peroxide include, but are not limited to:


• Some patients may experience increased tooth sensitivity to cold during the treatment, while others may have non-specific sensitivity in their teeth, gums, tongue, lips, or throat. Symptoms usually subside within 1-3 days.

• If the sensitivity is in the teeth, try whitening every other or every third night/day.

• Use a 5% potassium nitrate toothpaste, such as Sensodyne Total Care F toothpaste.

• If you have persistent sensitivity, Colgate Sensitive Pro-Relief toothpaste can be placed in your custom trays for 10 – 30 minutes after each treatment.

• Aspirin or Ibuprofen may be taken for pain.

Gingival (Gum) Irritation

• Trays that extend onto the gingivae (gums) may cause soft tissue irritation. Our trays should always be correctly adjusted. If you have any concerns consult our dental team.

• Reduce amount of gel in your trays. Teeth whiten when HP is absorbed into the tooth and whitens from the inside, so it is not necessary to cover the entire tooth.

If you still have gum irritation or tooth sensitivity, despite these precautions, you should postpone further treatment until the irritation subsides. Resume your treatment with shorter, less frequent applications until the desired whitening effect has been achieved. If discomfort continues, stop the treatment and consult our dental team.



Store between 15ºC and 25ºC (59ºF and 77ºF) in a dark, dry place.

Storage temperature above 25ºC (77ºF) will result in reduced shelf life.


Dispose of waste products and whitening devices in accordance with local waste regulations.

Laser eye surgery vision correction Leamington Spa | Optometry | Dentistry | Space Healthcare