COSMETIC PROCEDURES

Teeth Whitening

Teeth whitening is a cosmetic dental procedure that lightens the color of teeth and removes stains. Professional whitening uses concentrated bleaching agents — primarily hydrogen peroxide or carbamide peroxide — to break down stain molecules within the tooth structure and reveal a noticeably brighter smile.

(TEETH WY-tn-ing)

Also known as: Tooth bleaching, Dental bleaching

This article is for educational purposes and is not medical advice. Consult Dr. Durrett, Dr. Wilson, Dr. Danielle Durrett, or Dr. Vasconez for diagnosis and treatment specific to your situation.

Quick Facts

alsoCalled:: Tooth bleaching, dental bleaching
primaryUse:: Removing stains and lightening tooth color
activeIngredients:: Hydrogen peroxide or carbamide peroxide
professionalOptions:: Custom take-home trays, in-office whitening
results:: Typically 3-8 shades brighter; lasts 6 months to 3 years
notRecommendedFor:: Children, pregnant women, people with extensive restorations, certain types of staining

Overview

Few cosmetic dental procedures are more popular than teeth whitening. Americans spend billions of dollars annually trying to brighten their smiles, and for good reason — a brighter smile is consistently rated as one of the most desirable cosmetic improvements. The teeth whitening industry has exploded with options, from drugstore strips and toothpastes to in-office laser treatments and custom-tray systems prescribed by dentists. Not all whitening methods are equally effective or safe. Lakeview Family Dentistry has been whitening smiles in Hudson and across Pasco County for years, helping patients achieve dramatic results safely through professionally supervised treatment. Understanding how teeth whitening actually works — and the significant differences between over-the-counter products and dentist-supervised treatment — helps you make informed decisions about how to brighten your smile.

Why teeth become discolored

Teeth darken and discolor for many reasons, and understanding the cause helps determine whether whitening will be effective. Extrinsic staining occurs on the outer surface of teeth from things that come in contact with them. Common culprits include coffee, tea, red wine, dark sodas, berries, tomato sauce, soy sauce, and curries. Smoking and tobacco use cause some of the worst extrinsic staining. These surface stains respond well to whitening. Intrinsic staining originates inside the tooth and is more difficult to treat. Causes include certain medications taken during tooth development (notably tetracycline antibiotics), excessive fluoride during childhood (fluorosis), trauma that damages the developing tooth, and certain genetic conditions. Intrinsic stains may not respond fully to whitening; in some cases, veneers or crowns offer better results. Age-related darkening is natural. As we age, the outer enamel layer thins from years of wear, revealing more of the yellower dentin underneath. The dentin itself also yellows with age. This combination causes teeth to appear progressively darker even with excellent oral care. Genetics determines your natural tooth color. Some people are born with whiter teeth than others, and no amount of whitening can change the underlying genetic blueprint. Whitening can make teeth brighter than their natural color, but it works within biological limits.

How professional whitening works

Professional teeth whitening uses peroxide-based bleaching agents in concentrations much higher than over-the-counter products. The peroxide penetrates the porous enamel and breaks down stain molecules into smaller, less visible compounds. The chemical process is fundamentally the same whether using hydrogen peroxide (which works faster and is typically used in-office) or carbamide peroxide (which works more slowly and is the standard for take-home trays). The key advantage of professional whitening is concentration combined with safety monitoring. Drugstore products typically contain 3% to 10% hydrogen peroxide. Dentist-supervised take-home trays use 10% to 22% carbamide peroxide (which converts to roughly 3% to 8% hydrogen peroxide). In-office professional treatments use 25% to 40% hydrogen peroxide. Higher concentrations whiten more effectively but also pose more risk if misused, which is why professional supervision matters. At Lakeview Family Dentistry, we offer custom-fit take-home tray whitening. The dentist takes impressions of your teeth to create thin, comfortable trays that fit your mouth precisely. This precision is the most important advantage of professional whitening — the gel stays exactly where it should and doesn't escape onto gum tissue, which can cause burns and damage.

Professional vs. over-the-counter whitening

Over-the-counter whitening products include whitening toothpastes, rinses, strips, gels, and trays. They're widely available, relatively inexpensive, and can provide modest results for mild surface staining. They have significant limitations. The bleaching agent concentration is much lower, so results are gradual and less dramatic. Whitening strips don't conform well to teeth, particularly back teeth and teeth that are crooked or irregularly shaped — leaving these areas untreated. Generic trays don't fit your mouth properly, leading to inconsistent results and increased risk of gel contact with gums. No professional supervision means tooth sensitivity and gum irritation aren't monitored or managed. Underlying dental problems aren't identified before whitening begins. Whitening toothpastes work primarily through mild abrasives that polish away surface stains, not through bleaching. They can help maintain results but don't actually whiten teeth significantly. Professional whitening typically achieves three to eight shades of improvement, while OTC products achieve perhaps one to two shades at best. Professional whitening lasts longer because the deeper penetration affects more stain molecules. The cost difference is significant up front — OTC products may cost $20 to $50, while professional whitening ranges from $300 to $800 depending on method — but the dramatic difference in results often makes professional whitening worth the investment.

Frequently asked questions

Does teeth whitening hurt? Most people experience no pain during professional whitening, but some develop temporary tooth sensitivity during or shortly after treatment. This sensitivity typically subsides within a few days. Using sensitivity toothpaste before and during whitening reduces this risk. How long does it take to see results? With professional take-home trays, most people see noticeable improvement within a few days and full results within two weeks. In-office whitening provides immediate results in a single one to two hour appointment. How long do results last? Whitening results typically last six months to three years depending on diet, lifestyle, and home care. Touch-up treatments every six to twelve months maintain results. Smoking, drinking coffee and red wine, and poor oral hygiene shorten the duration of results. Will whitening damage my teeth? When performed properly under professional supervision, teeth whitening is considered safe. The peroxide doesn't actually damage enamel — it just oxidizes stain molecules. Excessive whitening, particularly with high-concentration products used too frequently, can cause increased sensitivity and gum irritation. Does whitening work on dental work like crowns and fillings? No. Whitening agents only affect natural tooth structure. If you have crowns, bridges, veneers, or large fillings on visible teeth, whitening will brighten the surrounding natural teeth but leave the dental work unchanged. This can result in mismatched colors. The dentist may recommend replacing visible restorations after whitening to match your new tooth color. Is whitening safe during pregnancy? Most dentists recommend postponing elective cosmetic treatments including whitening during pregnancy due to limited research on safety. Will my insurance cover whitening? No. Teeth whitening is considered cosmetic and is not covered by dental insurance.

Who should not whiten

Teeth whitening isn't appropriate for everyone. People with extensive crowns, bridges, or veneers on visible teeth may end up with mismatched colors. People with very sensitive teeth or exposed roots may experience significant discomfort. People with gum disease, untreated cavities, cracked teeth, or other dental problems should address those issues first — whitening can worsen these conditions. Children whose teeth are still developing should generally not undergo whitening. Pregnant and nursing women are typically advised to postpone whitening. People with unrealistic expectations may be disappointed — whitening makes teeth brighter, but it can't make them perfectly white if they're genetically darker, and it can't change the color of restorations. Before any whitening treatment, schedule a consultation with Lakeview Family Dentistry to determine whether you're a good candidate and which approach will work best for your specific situation.

References & Further Reading

Medically reviewed by the doctors at Lakeview Family Dentistry.
Last reviewed: 2026-05-12