Useful Notes on bleaching
In a survey of 7000 U.S. dentists, it was noted that some form of sensitivity occurred in 23% of patients using the overnight method. This sensitivity took the form of either increased sensation of hot and cold or a mild dull ache lasting a few hours after the bleaching session. Also some patients suffered from gum irritation. We design the bleaching trays so they just cover the teeth to avoid gum coverage and minimise this side-effect. If you suffer from either of these side-effects, shorten the bleaching cycle to about 2 hours. In addition, you may use a fluoride mouthwash such as Fluorigard Daily. Alternatively, you could put some Sensodyne in the bleaching trays overnight. This reaction to the bleaching process is short term and will subside once the bleaching is completed. If the symptoms subside then you may gradually increase the bleaching cycle length. If the symptoms persist, contact your dentist and stop bleaching.
Some patients find their teeth bleach in an uneven manner and take on a chalky or milky appearance. This will revert to a normal translucent appearance 2-3 week after the bleaching ceases.
The chewing tips (incisal edges) tend to bleach more quickly and effectively than the part close to the gum-line. You need to persist to achieve lightening of the neck of the tooth.
Bleaching only works on natural tooth substance so white fillings and crowns or veneers will not change colour. As the bleach works, the contrast in colour between natural tooth and non-natural tooth substance will increase. Depending on the size, number and extent of these restorations, you may need to consider replacing them.
It has been shown that longer bleaching sessions are more effective than short ones. The combined effects of 8 x 1 hour sessions are less than 1 x 8 hour session. Additional information is available by asking your dentist. We don't recommend bleaching at home without discussing it with your dentist first.