What type of teeth Cannot be whitened?

Teeth whitening doesn't work on dental restorations like crowns, veneers, and fillings, as these materials don't bleach like natural enamel, potentially making them look darker; also, deep intrinsic stains from tetracycline antibiotics, trauma, or excessive fluoride often resist whitening, as do teeth with severe decay or gum disease.

Are there some teeth that cannot be whitened?

Yes, some teeth or types of discoloration don't whiten well with typical treatments, especially intrinsic stains from medications (like tetracycline) or trauma, and dental work like crowns, veneers, or fillings won't change color, leading to uneven results; genetics, age, thin enamel, and deep brown/gray tones also limit whitening effectiveness.
 

What disqualifies you from teeth whitening?

One of the main reasons some people cannot have their teeth professionally whitened is if they're allergic or sensitive to the whitening solution. You should avoid teeth whitening if you are allergic to any of these ingredients. You will also be disqualified if you have a lot of tartar and cavities on your teeth.

Who is not eligible for teeth whitening?

It's not done if you're 17 years old or younger, or you have unhealthy teeth or gums. It's also not recommended if you: are pregnant or breastfeeding. have crowns, dentures or implants – teeth whitening can only lighten the colour of natural teeth.

Can all types of teeth be whitened?

No, not all teeth can be whitened effectively; while yellow stains often respond well, brown or gray discoloration (especially from injury, medication like tetracycline, or genetics) may not, and whitening doesn't change the color of dental work like crowns, veneers, or fillings, so it's crucial to consult a dentist to determine if you're a good candidate. 

Types of Teeth that Cannot Whiten with Peroxide Gels

Who should not get their teeth whitened?

Until an individual is about 16, the pulp chamber of the tooth is enlarged, so whitening could irritate the teeth. If you are pregnant or lactating, our dentist may suggest that teeth whitening be postponed. In the case of an allergy to peroxide, do not use whitening products, as peroxide is often the whitening agent.

What is the 2 2 2 rule for teeth?

The 2-2-2 rule for teeth is a simple oral hygiene guideline: brush your teeth twice a day, for two minutes each time, and visit the dentist twice a year for checkups and cleanings. This routine helps prevent cavities, gum disease, and keeps your smile healthy by ensuring thorough plaque removal and professional monitoring.
 

Why do dentists not recommend teeth whitening?

Enamel Damage

Overuse of whitening products can wear down tooth enamel, leading to increased sensitivity and a higher risk of cavities. It's crucial to use whitening treatments in moderation and under the guidance of a dental professional.

Can aged yellow teeth be whitened?

It's natural for teeth to appear darker as they age, but a bleaching product with hydrogen peroxide or urea peroxide can help turn back the clock – and a whitening toothpaste is an easy way to get a jump-start.

Do dentists whiten your teeth for free?

The cost depends on the type of treatment and which cost band the treatment is covered by. With the exception of teeth whitening, implants and veneers, the treatments on this page are usually available on the NHS.

What is the 3-3-3 rule for teeth?

The 3-3-3 rule for brushing teeth is a simple mnemonic some dental professionals use to encourage excellent daily hygiene: brush 3 times a day, for 3 minutes each session, and replace your toothbrush every 3 months.

Do teeth turn yellow again after whitening?

Teeth whitening is an effective way to brighten your smile, but it's not a permanent solution. After teeth whitening, your teeth can turn yellow again due to several factors. Diet: Certain foods and drinks, like coffee, tea, red wine, cola, and dark-colored fruits and vegetables, contain pigments that can stain teeth.

Can brown teeth be whitened?

Yes, brown teeth can often be whitened, especially if the stains are from food, drinks, or tobacco, using professional bleaching or OTC products, but stubborn or intrinsic (internal) stains, like from medication or trauma, might need dental bonding, veneers, or internal bleaching for best results, so a dentist visit is key to find the cause and best solution.
 

Why won't my yellow teeth whiten?

The natural color of teeth can vary due to various factors, including genetics, age, and lifestyle habits. Some individuals naturally have teeth that are darker or have a yellowish tint. These teeth may have a denser enamel layer or more pigmented dentin, making them more resistant to whitening treatments.

How much does it cost to have teeth whitened at a dentist?

Teeth Whitening Cost London: Average Prices in 2025

The exact figure depends on whether you choose an at-home kit or an in-clinic treatment. On average, dentist-supervised home whitening costs between £200 and £400. In-practice whitening, such as laser or LED, usually ranges from £300 to £800.

When can you not do teeth whitening?

If you are younger than 16, you are not a candidate for teeth whitening. This is because the pulp chamber in young teeth is larger than that of an adult, and whitening treatments could cause irritation. If you are pregnant or lactating, teeth whitening is not recommended.

Is it harder to whiten teeth as you get older?

As we age, the enamel on our teeth wears down, revealing the yellowish dentin beneath. This natural process can make it difficult to achieve the bright white results typically seen with younger teeth. In such cases, alternative treatments like veneers may be more effective.

Is it worth getting your teeth whitened at the dentist?

Yes, professional teeth whitening is generally considered worth it for those seeking faster, longer-lasting, and safer results with dental supervision, despite the higher upfront cost compared to over-the-counter (OTC) options, offering dramatic improvements in a single session and personalized care.
 

Can I scrape yellow off my teeth?

Be cautious of over brushing, especially if you have a history of neglect. You cannot reverse years of plaque buildup by attempting to “scrape” or “scrub” discoloration or cumulus off your teeth.

What is the least damaging way to whiten your teeth?

The least damaging teeth whitening methods prioritize gentleness, with oil pulling and baking soda being very mild options for surface stains, while professionally made custom whitening trays from a dentist offer the safest bleaching, as the precise fit prevents gel leakage onto gums, minimizing sensitivity and damage. Over-the-counter strips and whitening toothpaste are generally safe when used as directed, but can cause gum irritation if misused.
 

Do teeth become weak after whitening?

Teeth whitening doesn't inherently weaken teeth if done correctly and in moderation, but overuse or improper application can lead to enamel damage, increased sensitivity, and gum irritation because bleaching agents temporarily make enamel more permeable and can slightly lower its pH, though saliva helps remineralize it. Professional treatments are generally safer, but even over-the-counter products can be safe when used as directed; the key is to avoid frequent, aggressive bleaching to prevent long-term erosion and reveal the yellower dentin underneath. 

Are some teeth impossible to whiten?

Yes, some teeth or types of discoloration don't whiten well with typical treatments, especially intrinsic stains from medications (like tetracycline) or trauma, and dental work like crowns, veneers, or fillings won't change color, leading to uneven results; genetics, age, thin enamel, and deep brown/gray tones also limit whitening effectiveness.
 

Can dentists tell if you only brush once a day?

Yes, dentists can often tell if you only brush once a day. Signs like plaque buildup, gum inflammation, and tartar reveal brushing frequency during exams.

Is it okay to leave toothpaste on your teeth overnight?

Leaving toothpaste on your teeth overnight isn't generally recommended by dentists, as it can lead to gum irritation, potential enamel erosion from abrasives, and bacterial buildup, though some suggest it for cavity-prone individuals due to fluoride's benefits. For most people, it's best to spit out excess toothpaste and avoid rinsing immediately, letting the fluoride work for a bit, but not leaving a paste layer all night. Rinsing thoroughly after brushing is still important to remove residue and food particles, especially for children. 

When a dentist says 2?

The dental hygienist may notice occasional bleeding during this step. 3. Code 2: Mild to moderate gum disease with bleeding and calculus. A Code 2 score suggests bleeding gums and the presence of calculus.