Instructions for Bleaching of Non-vital Teeth

1. Confirm that the root canal treatment is correctly done and that there is no periradicular

disease. If necessary, retreat the canal.

2. Isolate the tooth, preferably with rubber dam.

3. Remove GP for 4-5 mm below alveolar crest.

4. Fill this root canal space with polycarboxylate cement eg Durelon.

5. Remove and replace any existing decay, leaking or discoloured restorations.

6. Remove excess cement and cut deep, well defined undercuts underneath the entire

circumference of the access cavity. This is extremely important. The procedure is

totally dependant upon the seal and retention of the temporary restoration.

7. Using a cotton wool pledget and chloroform clean the access cavity. The

chloroform removes debris and fatty deposits.

8. Mix 20-30% hydrogen peroxide with sodium perborate into a creamy mixture.

Use fresh hydrogen peroxide, preferably a brand new bottle.

9. Introduce the mixture into the access cavity with a flat plastic instrument.

10. At this stage, the chairside assistant should start mixing the reïnforced zinc oxide

eugenol (IRM) temporary restoration. Simultaneously, the dentist removes all of

the bleaching material (peroxide/ sodium perborate) from the undercuts, using a

spoon excavator. This is the difficult part, because the mixture is runny, but it has

to be done correctly. If the mixture is present inside a section of the undercut it

will cause the temporary restoration to leak and there will be no bleaching.

11. Place the IRM into the access cavity,ensuring that it goes into the prepared, clean,

dry undercuts. Use the fingers to maintain pressure until the IRM has set

completely. Do not neglect this step.

12. Remove excess IRM. Check occlusion.

13. Dismiss patient. Recall at two weeks. Repeat procedure every two weeks until

desired shade is achieved. Bleach a shade too white to allow for relapse.

14. Restore access cavity with resin composite

how to whiten your teeth at home

 Don't spend your hard-earned money on expensive teeth whitening kits! Get the very same results absolutely free. Don't pay a high office call to go to the dentist and get your teeth professionally whitened! You can have white teeth with things that are probably just sitting in your medicine chest or kitchen cupboard. Don't bother with those gel packs that you have to leave on your teeth. Don't buy that expensive mouthwash for smokers! You have everything that you need to brighten and whiten your teeth right in your own home. Remember that this is free and it works. 

this video shows how to whiten your teeth at home

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The three most common ways to whiten your teeth

In most cases, the natural colour of teeth is within a range of light grayish-yellow shades. Teeth naturally darken with age and their appearance can be affected by the accumulation of surface stains. In addition, the perception of the colour of teeth is severely affected by skin tone and make-up. People with darker skin or who use dark makeup will look like they have brighter teeth.
Although teeth are not naturally meant to be completely white, many Canadians want a brighter smile. Responding to this desire, a wide range of "whitening" options has become available to consumers. These products fall into two main categories: surface whiteners and bleaches. Before purchasing any tooth whitener, you should consult your dentist. Taking into account your unique oral health conditions, your dentist will be able to determine what, if any, tooth whitener is the right one for you.

Start a Great Daily Oral Health Regime
• Brush twice a day with a fluoride toothpaste
• Floss and clean between your teeth once a day
• Schedule regular exams and cleanings with your dentist
• Limit stain-causing drinks such as red wine, tea and coffee
• Cease habits such as smoking and chewing tobacco.

Common Teeth-whitening Options
In-office whiteningThe procedure usually takes 30 to 90 minutes, and one to three visits to the dental office. A protective gel, shield or rubber dam is used to protect your gums from the bleaching agent which is usually a form of hydrogen peroxide. A bleaching agent is then applied or "painted" onto your teeth and heat or high-intensity lights used to enhance the whitening process.


At home whitening
This is usually done by applying a bleaching solution to a custom-formed mouthguard that is left in the mouth for a specified time. Some products are intended for twice-daily use for up to two weeks. Others are intended for overnight use for one to two weeks.


Whitening toothpastes
All toothpastes remove surface stains through the action of mild abrasives. Whitening toothpastes contain special chemicals or polishing agents that have additional surface-stain removing properties, but don’t alter the intrinsic colour of the teeth.

It's important to know that not everyone’s teeth will “whiten” to the same degree. It depends on the number of teeth involved, the severity of discolouration and the natural colour of your teeth. The perception of the colour of your teeth is also influenced by skin tone.

Some patients may find that the soft tissue of the gums can become sensitive or irritated by the mouthguard or the solution. If you have concerns, it is important that you bring these to the attention of your dentist.

How To Make Your Teeth White

Tooth whitening (or bleaching) is a simple, non-invasive dental treatment used to change the color of natural tooth enamel and is an ideal way to enhance the beauty of your smile. Because having whiter teeth has now become the number one aesthetic concern of most patients, there are a number of ways to whiten teeth. The most popular method is using a home tooth whitening system that will whiten teeth dramatically. Since tooth whitening only works on natural tooth enamel, it is important to evaluate replacement of any old fillings, crowns, etc. Replacement of any restorations will be done after bleaching so they will match the newly bleached teeth. Tooth whitening is not permanent. A touch-up maybe needed every several years, and more often if you smoke, drink coffee, tea, or wine.

In-Office Whitening

Significant color change in a short period of time is the major benefit of in-office whitening. This

protocol involves the carefully controlled use of a relatively high-concentration peroxide gel, applied to the teeth by the dental assistant after the gums have been protected with a paint-on rubber dam.

Generally, the peroxide remains on the teeth for several 8 minute intervals that add up to an hour (at most). Those with particularly stubborn staining may be advised to return for one or more additional bleaching sessions, or may be asked to continue with a home-use whitening system.

Professionally Dispensed Take-Home Whitening Kits Take-home kits incorporate an easy-to-use lower-concentration peroxide gel that remains on the teeth for 30-90 minutes. The lower the peroxide percentage, the longer it may safely remain on the teeth. The  gel is applied to the teeth using custom-made bleaching trays that resemble mouth guards.