What is teeth whitening?
When Stain Internalization takes place, these stains cannot be removed by scaling and polishing and one has to resort to Teeth Whitening Treatment. Teeth whitening (also known as Teeth Bleaching), when bleach is employed for whitening of the teeth beyond the natural shade.
The core mechanism is that hydrogen peroxide breaks down to water, oxygen ion and oxygen free radicals. These oxygen molecules attach with the double carbon bonds, break them down into single carbon bonds that reflect light and appear lighter in colour.
What causes stains?
Extrinsic tooth stains are typically caused by tobacco use, smoking or by regularly drinking coffee, tea, wine or cola drinks.
– As aging occurs, the outermost layer of the tooth, i.e. the enamel wears off and dentinal layer, which is yellowish in colour, exposes itself causing yellow teeth.
– Clenching/grinding of the teeth, known as Bruxism cause micro- cracking of the teeth. These cracks readily absorb stains and cause stain internalization.
– Genetic disorders like Amelogenesis Imperfecta or Dentinogenesis Imperfecta which causes abnormal formation of enamel and dentin and hence abnormal shade of the teeth.
– Flourosis of the teeth which occurs due to hypo mineralization and an excessive intake of fluoride during enamel formation. Initially white spots are seen, which at an advanced stage causes brown staining.
– Dental trauma that might have caused internal resorption or necrosis of the pulpal tissue, resulting in discoloration of the tooth.
What are the contraindications of bleaching?
– Hypersensitive teeth
– Allergy to peroxide
– Unrealistic patient expectations
– Pregnant/lactating women
– Severe gum recession
– Untreated periapical pathology
What are the methods employed for teeth whitening?
Basically, teeth whitening could be done by In- office bleach or At-home bleach. Bleaching solution contain hydrogen peroxide, carbamide peroxide or sodium perborate in varying concentrations. Hydrogen peroxide is the most effective bleaching agent. Before undergoing teeth whitening treatment; the doctor evaluates the patients for allergies, teeth hypersensitivity, state of the oral soft and hard tissues etc. Shade guides are used which varies from two to seven shades.
In- office bleach is carried out by a dental professional. Before starting the procedure, it is advisable to carry out scaling and polishing. Then, the gums are covered with a protective layer, in order to prevent the gums from chemical burns. Followed by this, the bleaching agent is applied onto the tooth surfaces and left undisturbed for a specific time period, depending on the concentration of the bleaching agent in the gel. The maxillary/upper and mandibular/lower teeth could be bleached simultaneously or maxillary teeth can be bleached followed by mandibular teeth. Bleaching agent in a gel form is recommended in order to prevent the dehydration of teeth.
In Zoom whitening procedure, bleaching gel is applied as well as laser bleaching is used. But according to a study in 2007, the procedure is equivalent to chemical bleaching solely; therefore unnecessary exposure to laser bleaching is not recommended.
For At-Home Bleach, The dentist takes the impression of the upper and lower arches, custom trays are fabricated and the patient is provided with the bleaching agent. The trays along with the bleaching solution are used; the frequency depends on the intensity of stains. Teeth whitening toothpastes, Over-the-counter whitening strips and gels are also available. This method is less effective as compare to In-office Bleach.
Non vital Bleaching:
Non- vital bleaching is performed in teeth that have undergone endodontic treatment, wherein the bleaching agent is placed in the root canal, which is replaced as needed.
Post Whitening Instructions:
Post treatment, 24-48 hours are crucial for achieving the best results. Ask the patient not to consume food that might stain the teeth. Teeth might be sensitive for a period of 24-48 hours and ask the patient to avoid consumption of too hot or too cold food and beverages.
– Regular flossing of the teeth.
– Whitening toothpaste once/twice a week
– Rinse mouth after consuming food or beverages that might stain your teeth
As bleaching has its pros and cons, do not undergo the treatment without consulting a licensed and skilled dental professional.
Contact Us: Teeth Care Centre, 2nd Floor, Pushpak66, Near Someshwar Jain Temple, 132ft Ring Road, Satellite, Ahmedabad 380015, India..
Call: +917878783384, +919377783384