How many sessions are usually needed?

In-office bleaching is usually completed in one session. At-home bleaching requires wearing trays for about 2-4 weeks. Internal bleaching usually requires 2-3 follow-up visits. Mild to moderate staining may show results after 1-2 sessions; severe staining or high esthetic demands may require 3-5 sessions.

How long do I need to stay?

In-office bleaching takes about 45-60 minutes, and internal bleaching takes about 30-45 minutes each time. The patient can leave afterward. At-home bleaching can be used independently at home after the first visit.

Overall risk is low. Tooth sensitivity is relatively common.

Treatment Procedure

Routine Dental Treatment

Tooth Bleaching

Teeth whiteningTooth bleaching techniqueDental whitening

Bleaching agents are used to improve tooth color. It is suitable for some extrinsic or intrinsic staining, after caries, pulp, and periodontal problems are ruled out.

Tooth bleaching uses peroxide bleaching agents to break down pigments inside and outside the tooth structure and improve tooth color. It is suitable for age-related yellowing, mild to moderate extrinsic staining, and some fluorosis or tetracycline staining. Before bleaching, caries, cracked teeth, pulp disease, and severe periodontal problems must be ruled out, and the patient should be informed about possible short-term sensitivity and color rebound. For severe discoloration, enamel defects, or shape abnormalities, bleaching alone has limited effect and may need to be combined with veneers or crowns.

Start Planning View Process Steps

Quick Reference

Treatment

1 hours – 8 hours

Observation

0 mins – 1 days

Est. Cost

$100 – $300

Department

Cosmetic Dentistry

1 hours – 8 hoursDuration

$100 – $300Cost

Who Is This For

Is Tooth Bleaching Right for You?

Good Candidates

Mild to moderate tetracycline staining, dental fluorosis, or enamel hypoplasia
Age-related tooth yellowing
Extrinsic staining from food, drinks, or tobacco
Non-vital discolored teeth after adequate root canal treatment, suitable for internal bleaching

May Not Be Suitable

Uncontrolled periodontal inflammation
Large tooth defects
Teeth with no value for preservation
Peroxide allergy, pregnancy or breastfeeding, and minors

Step-by-Step Process

How Tooth Bleaching Works

In-office Light-activated Whitening

Record the initial tooth shade, apply a dedicated gingival barrier to isolate the gums, use coated protective eyewear, clean and polish the teeth, apply bleaching agent evenly to the tooth surfaces, remove the whitening agent, compare shade change, and provide detailed care instructions such as avoiding staining foods and using whitening toothpaste.

At-home Bleaching

The dentist takes impressions and makes customized clear trays, prescribes 10%-22% carbamide peroxide gel, and instructs the patient to place the whitening agent in the custom tray and wear it about 6-8 hours daily for about 2-4 weeks, with follow-up every week or every 2 weeks to assess progress.

Internal Bleaching

For non-vital discolored teeth, confirm that root canal treatment is adequate, seal bleaching agent inside the pulp chamber, temporarily seal the cavity, and review after 1 week. Repeat treatment every 5-7 days as needed until effective, then remove the bleaching agent and restore with resin filling.

In-office bleaching usually requires one treatment. At-home bleaching usually requires continuous wear for 2-4 weeks, several hours per day. Internal bleaching usually requires follow-up every 5-7 days and repeated treatment until the color improves, generally 2-3 follow-up visits.

Cost Information

Cost Estimate for Tooth Bleaching

Estimated Price Range

$100 – $300

What's Included

Cost is affected by bleaching method, in-office, at-home, or internal bleaching, bleaching agent type, number of treatments, number of teeth, and whether caries, periodontal inflammation, or tooth sensitivity must be treated first.

Before Your Visit

What to Prepare

Required Tests & Examinations

If you already have recent valid test results, bring the reports. If not, these assessments can usually be completed in China before the procedure.

Comprehensive oral clinical examination to assess the cause and degree of staining and enamel condition

Pulp vitality testing to determine pulp status

Documents & Materials to Bring

Required to Bring

Recent oral examination records or dental radiographs if available

Previous dental treatment records, especially fillings, root canal treatment, veneers, or full crowns

Previous whitening or bleaching treatment records if available

Medication allergy history

History of tooth sensitivity

Companion & Support

A dedicated companion is usually not needed. For children, older adults, pregnancy, underlying medical conditions, or when treatment may affect eating or travel afterward, having a family member accompany the patient is recommended.

After Treatment

Recovery & Follow-Up

Avoid very cold, very hot, and easily staining foods and drinks such as coffee, tea, red wine, and soy sauce for 24-48 hours after treatment.

Desensitizing toothpaste is recommended.

Have professional cleaning every 6 months.

Review yearly.

Follow-Up Schedule

At-home bleaching is reviewed weekly to assess progress. Other bleaching treatments are reviewed every 6 months after bleaching.

Related Conditions

Conditions This Procedure Treats

Dental fluorosis

Abnormal enamel color and structure caused by excessive fluoride intake during tooth development. It mainly affects appearance, and severe cases require restorative treatment.

Learn more

Enamel hypoplasia

Insufficient enamel formation or mineralization during tooth development, which may cause abnormal color, surface defects, sensitivity, and increased caries risk.