Teeth whitening
Hong Kong dentist via WhatsApp personally answers questions about teeth cleaning.
When to get teeth whitening
Teeth whitening
Teeth discoloration or yellowing
External staining caused by coffee, tea, red wine, cigarettes, etc.
Natural dullness due to age
As we age, tooth enamel thins and dentin darkens.
Drug-induced staining
For example, the use of tetracycline antibiotics in childhood may cause discoloration inside the teeth.
Teeth whitening fee
2025 Qi Ren Dental Center Teeth Whitening Price
| Home teeth whitening: HKD$4, starting from HKD800 |
| Blue light teeth whitening: From HKD$6,800 |
Teeth whitening process
Teeth whitening process in Hong Kong in 2025
Home Teeth Whitening Steps
Blue light teeth whitening
Common problems with dental bleaching
The whitening effect can last for 1–2 years, but it is not permanent, depending on diet and oral hygiene habits.
Suitable candidates for teeth whitening include: those who want to quickly improve the color of their teeth before important occasions such as weddings or job interviews; those whose teeth are stained due to long-term consumption of coffee, tea, or smoking; and those who want to see results in one treatment.
Sensitive risksSome people may experience tooth sensitivity after dental bleaching, which usually subsides within a few days.
Blue light teeth whitening is a teeth whitening treatment that combines chemical and optical technologies. Its core principle is to use high-intensity blue light (wavelength approximately 480–520 nanometers) as a catalyst to accelerate the chemical reaction of whitening agents (such as hydrogen peroxide or urea peroxide). When blue light shines on the surface of teeth coated with the whitening agent, it causes the agent to release reactive oxygen molecules. These molecules can penetrate the enamel and dentin, breaking down precipitated pigment molecules, such as those caused by coffee, tea, and cigarette smoke.
This oxidation reaction not only removes surface stains but also penetrates deep into the tooth structure, improving internal staining caused by age or medication. Because blue light is a cold light source and does not contain ultraviolet rays, it has low irritation to teeth and gums, making it a safe and effective whitening method under dentist supervision.
Blue light bleaching generally does not cause severe pain, but some people may experience pain during or after the treatment.Temporary tooth sensitivity or sorenessThis is because hydrogen peroxide in whitening agents releases oxygen free radicals when activated by blue light, which penetrate the tiny tubules on the surface of teeth and may temporarily increase the response to cold, heat, acid, or sweet stimuli.
The whitening effect of at-home teeth whitening generally lasts for about [time period missing]. Six months to nine monthsThis period can vary depending on individual factors, including: dietary habits, oral hygiene, smoking habits, and the condition of the teeth themselves.
Schedule a dental appointment
You can book your dental check-up and whitening appointment at Qi Ren Dental Center online in advance. For any dental questions, you can also WhatsApp us first, and a dentist will answer them personally.