Als known as ( tooth bleaching ) is a procedure that brightens natural vital tooth structure from the inside (dentin).Therefore,the color of the dental fillings or prosthesis cannot be change with this procedure.This can be performed using peroxide gel topically without grinding away tooth structure.The only expected complication is transient mild to moderate sensitivity which varies a month each individual.Nevertheless,since tooth whitening has gained more popularity nowadays,newer generation of bleaching materials have been proposed in the market. This improved versions are aimed to be more effective and cause less sensitivity.
Tooth discoloration / staining can be divided into two categories
- Extrinsic staining is from external substances such as; coffee, tea, red-wine, food or cigarette.
- Intrinsic staining is caused by internal changes of tooth structure as a result of many factors.A yellow crystalline broad-spectrum antibiotic is known to induce tooth color changes while forming before the age or 8 years old. Moreover,non-vital teeth from accident or caries can manifest as discoloration as well as other abnormal tooth formations.
Tooth Whitening methods
There are many methods available, however, at home bleaching using trays and in-office bleaching are the only two methods that have been shown to be effective.
1. At Home Bleaching
At home bleaching patient will receive custom-made trays along with prescribed carbamide peroxide gels from the dentist. Apply the trays overnight ( at least 6 hours each time ) for 6 to 8 weeks during sleep.
2. In-Office Bleaching
This method has become the most popular these days because it is done at the dental office within 45 minutes – 1 hour, using light combination with bleaching agent. Most patients find it this very convenient and less time-consuming than ‘at home bleaching’ procedure.
All in all,detailed dental examination is required prior to procedure to achieve accurate diagnosis of dis-coloration and rule out other pathogenic conditions.Age of patient,existing dental fillings and/or prosthesis,type of stain are the example of factors that directly affect the result of the procedure.Moreover,unrealistic expectations of the patients will have to be addressed and discussed before starting the procedure.
Teeth whitening duration
-it will take around 45 minutes to 1 hour for in office bleaching. As for home bleaching it depends on the initial shade of patient teeth which dentist will give a recommendation case by case.