
Teeth whitening: Which method is best, how long does it last, and how much does it cost?
Teeth whitening uses bleaching gels at an appropriate concentration to break down deep stains within the tooth structure, helping teeth look noticeably whiter again, especially when performed in a clinic under a dentist’s supervision. It is suitable for people whose teeth have become dull from tea, coffee, smoking, or age, but the degree of whitening varies depending on the original tooth shade and each person’s habits. Because of this, you should always have your teeth and gums examined by a dentist before whitening, and maintain good oral hygiene while reducing stain‑causing factors to keep your teeth whiter for longer and ensure the treatment is as safe and effective as possible. What is teeth whitening, and which types of yellow teeth can it help with Teeth whitening is a procedure that uses bleaching agents (such as hydrogen peroxide or carbamide peroxide) to break down pigment molecules that have built up inside the tooth structure, making the teeth look whiter and brighter, not just by polishing away surface stains. It usually works well for yellow or dull teeth caused by tea, coffee, red wine, smoking, aging, or certain medications. However, if the discoloration is due to a non‑vital (dead) tooth, crowns, veneers, or old tooth‑colored fillings, whitening typically does not change the shade of these materials, so additional or alternative treatments are often needed. Teeth whitening: how many types are there? Whitening Method Where It Is Done Speed of Results Longevity of Results Estimated Cost In-Office Teeth Whitening Dental Clinic Fast results, often visible after 1–2 sessions Typically lasts around 6 months to 2 years with proper care Higher cost among the three options At-Home Whitening Kit (Dentist-Supervised) At Home Gradual whitening over several days to weeks Can be maintained long-term with periodic touch-ups Moderate cost, generally lower than in-office whitening Over-the-Counter








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