What causes the discolouration of the teeth?
Our teeth become even more grey during our lifetime. Coffee, tee, coke, wine and smoking can stain your teeth. These colouring materials are neutralized by the whitening substances and the original colour of our teeth can be seen again.
Before the bleaching procedure we check the teeth carefully. We take health and dental history (including allergies and sensitivities), observe hard and soft tissues, placement and conditions of restorations, and sometimes x-rays to determine the nature and depth of possible irregularities. During the oral hygenic treatment we remove the fur, do scaling and polish the surfaces of teeth. After this we check the filling and if it is necessary, we change them. The devitalized teeth that have undergone endodontic therapy need further treatment, which we call internal bleaching.
What is the difference between the at-home and in-office bleaching?
There are two main methods of gel bleaching - one performed with high-concentration gel, and another with low-concentration agents. High-concentration bleaching can be accomplished either in the dental office, or at home. Performing the procedure at home is accomplished using high-concentration carbamide peroxide, which is readily available online or in dental stores and is much more cost-effective than the in-office procedure. Whitening is performed by applying a high concentration of oxidizing agent to the teeth with thin plastic trays for a short period of time, which produces quick results. The application trays ideally should be well-fitted to retain the bleaching gel, ensuring even and full tooth exposure to the gel. Trays will typically stay on the teeth for about 15–20 minutes. Trays are then removed and the procedure is repeated up to two more times. Most in-office bleaching procedures use a light-cured protective layer that is carefully painted on the gums and papilla (the tips of the gums between the teeth) to reduce the risk of chemical burns to the soft tissues. The bleaching agent is either carbamide peroxide, which breaks down in the mouth to form hydrogen peroxide, or hydrogen peroxide itself.
Low-concentration whitening is far less effective, and is generally only performed at home. Low-concentration whitening involves purchasing a thin mouthguard or strip that holds a relatively low concentration of oxidizing agent next to the teeth for as long as several hours a day for a period of 5 to 14 days. Results can vary, depending on which application is chosen, with some people achieving whiter teeth in a few days, and others seeing very little results or no results at all. Whitening is potentially better at a dentist because the strip or mouth-guard does not completely conform to the shape of the teeth, sometimes leaving the tips of the teeth (near the gumline) unbleached. The bleaching agent is typically less than 10% hydrogen peroxide equivalent, so irritation to the soft tissue around teeth is minimized. Dentists as well as some dental laboratories can fabricate custom fitted whitening trays that will greatly improve the results achieved with an over-the-counter whitening method.
Does bleaching harm the teeth?
Tooth whitening, which is led by a dentist and done with the offered materials have no deteriorative effect. It won't change the structure of teeth and the bleached teeth won't be more disposed to caries than usual.
Tooth sensitivity, which is due to temporary water-loss of the teeth is usually present for 1-2 days after the treatment. Of course, it will disappear in a few days. To release your complaints you should use fluoride containing tooth paste and avoid eating and drinking cold meals and drinks.
In contempt of gumprotection the material can touch the mucous membrane and colour the gum to white. It will disappear in 15-20 minutes after rinsing your mouth and then won't cause any furher complaints.
For what should I care after bleaching?
After the whitening you should avoid coloured meals and drinks (for example coffe, tee, coke, red wine, foods containing paprika) and smoking. You'd better use this opportunity for giving up smoking!
For how long will this effect last?
According to the patient's customs it lasts usually from 1-3 years, but many patient needs only sustaining therapy for decades. Toothwhitening can be repeated!