Whitening after root canal · Taepyeong, Seongnam

Internal Bleaching for a Dark Tooth After Root Canal, near Taepyeong Station

A single front tooth that has turned grey or dark after root canal treatment can often be lightened from the inside with internal (non-vital) bleaching.

Message us Call +82-31-757-1525

₩165KInternal bleaching per tooth (VAT incl.)

₩385KProfessional whitening (VAT incl.)

₩600KLaminate veneer per tooth (VAT incl.)

₩550KZirconia crown, front tooth

Ask about Whitening After Root Canal

Tap what fits — your message is prepared for you. Nothing is sent until you press send.

Send opens your email app addressed to theseouldc@naver.com. Prefer chat? KakaoTalk channel · Instagram DM · or call +82-31-757-1525.

The short answer

A single front tooth that has turned grey or dark after root canal treatment can often be lightened from the inside with internal (non-vital) bleaching. The clinic's published fee for whitening after root canal is ₩165,000 per tooth, VAT included. It only suits a tooth with a sound root canal filling, the shade change varies, and the color can darken again over time.

Why a Tooth Darkens After Root Canal

When the nerve inside a tooth is damaged, by a knock, deep decay or the problem that led to root canal treatment, breakdown products from the pulp and blood can stain the dentine from the inside. Some filling materials used inside the tooth can also add to the discoloration. The result is often one front tooth that looks grey, brown or yellow next to its neighbors.

Because the stain is inside the tooth rather than on the surface, a scale and polish will not remove it, and ordinary whitening applied to the outside of the teeth tends to lighten the healthy teeth more than the dark one. Internal bleaching works from where the stain actually is.

A tooth that darkens without any previous root canal treatment needs examining first. It can mean the nerve is no longer healthy, and the dentist will check that with an X-ray and tests before any cosmetic treatment is discussed.

Whitening After Root Canal: how the treatment is planned

How Internal Bleaching Works

Internal bleaching is sometimes called non-vital or walking bleaching. A typical course looks like this, though your dentist adapts it to the tooth.

Check the root canal

An X-ray and examination confirm that the root canal filling is sound and the tooth is free of active infection. If not, that is treated first.

Protect the root filling

A small opening is made at the back of the tooth, and a protective seal is placed over the root canal filling so the bleaching agent stays in the crown of the tooth.

Place the bleaching agent

A whitening material is placed inside the tooth and the opening is sealed with a temporary filling. You go home with it in place.

Review and repeat if needed

At a later visit the shade is checked. The agent may be renewed until the tooth is as close to its neighbors as it will reasonably go; the number of visits varies.

Final filling

The opening is closed with a tooth-colored filling. If needed, small differences in shade or shape can then be addressed with bonding.

Who It Suits and Its Limits

Internal bleaching is a conservative option because it keeps the natural tooth surface. It is not right for every dark tooth, and your dentist will tell you honestly if it is unlikely to help.

Good starting point

Often suitable

A single dark front tooth with a sound root canal filling, a largely intact crown and no current infection or crack.

Treat first

Root filling needs attention first

If the existing root canal filling is incomplete or there are signs of infection, the root canal may need to be redone before any bleaching. That is quoted after examination.

Consider alternatives

Often less suitable

A tooth with a large filling, a crack, very little remaining structure, or staining from certain materials may respond poorly. A veneer or crown may be more predictable.

Be realistic

Possible relapse

The tooth can darken again over months or years. Some patients choose to repeat bleaching later; others move to a veneer or crown. No result can be promised.

Comparing Your Options for One Dark Tooth

Internal bleaching is usually the least invasive starting point, and it can be combined with other treatment. For example, a tooth can be bleached first so a later veneer or crown has a lighter base to work from, or you can whiten all your teeth first so the dark tooth is matched to the final shade.

Cosmetic prices on the clinic's schedule include VAT. Crowns are listed separately.

Option	What it does	Published fee (KRW)
Internal bleaching (whitening after root canal)	Lightens the dark tooth from inside; keeps natural enamel	₩165,000 per tooth, VAT included
Professional whitening	Lightens the outer surface of the teeth generally; limited effect on internal staining	₩385,000, VAT included
Laminate veneer	Covers the front surface with a thin ceramic shell; some enamel reduction	₩600,000 per tooth, VAT included
Zirconia crown, front tooth	Covers the whole tooth; often considered when much tooth structure is lost	₩550,000
Core build-up or post	Rebuilds the inside of a weakened tooth before a crown, if needed	₩100,000

Prices as published; confirm at consultation. Root canal treatment is not on the published schedule and is quoted after examination.

Who Treats Root-Canal Teeth at the Clinic

Root canal treatment and restorative work at the clinic usually go to Dr. Min Ji Choi, who is a Ministry-certified specialist in Conservative Dentistry and in Advanced General Dentistry. Conservative dentistry is the specialty that covers root canal treatment and restoring damaged teeth.

If your root canal was done elsewhere, bring any records or X-rays you have. The dentist checks the existing root filling before recommending bleaching, retreatment or another approach, and explains the reasons in English.

After Treatment

Simple habits help the result last and protect the tooth.

Avoid biting very hard foods on the treated tooth while a temporary filling is in place.
Tell the clinic if the temporary filling feels loose or falls out.
Cut back on coffee, tea, red wine and tobacco, which stain all teeth.
Keep up regular check-ups so the tooth and its filling can be reviewed.
Contact the clinic if you notice pain, swelling or a change in color.

Visiting from Taepyeong, Moran, Sinheung or Bundang

The clinic is at 2–3F, 1225 Seongnam-daero, Sujeong-gu, Seongnam, by Taepyeong Station Exit 5, near Sujin, Sinheung, Moran and Gachon University, and reachable from Bundang and Wirye. Hours are Monday to Wednesday 09:30–20:30, Thursday 09:30–19:00, Friday 09:30–18:30 and Saturday 09:30–13:00, with no lunch break; closed on Sundays and open on public holidays.

Internal bleaching usually needs more than one visit, so if you are in Korea for a short stay, mention your dates when you book. The consultation before treatment is free, and English-language consultation is available.

Clinical case

A case from the clinic

Cosmetic

A darkened front tooth: root canal retreatment, internal whitening and a ceramic crown

Treated by Dr. Hyun Sung Park

After: A darkened front tooth: root canal retreatment, internal whitening and a ceramic crown — Front view before and after treatment

Why the patient came in

The patient came in because one upper front tooth had turned dark. The tooth had a root canal treatment from before, and the X-ray showed inflammation at the root tip.

What was done

The root canal treatment was redone. On opening the tooth, dark contaminated material was found inside the canal.
Part of the root filling was removed and a barrier of glass ionomer or resin was placed to keep the whitening agent inside the crown of the tooth.
A whitening agent was sealed inside the tooth and the colour was checked every 4 to 7 days.
After whitening, the shade was matched and an all-ceramic crown was made so that no dark colour shows through.

Ceramic crowns made to match the neighbouring teeth

Published with the patient’s consent. Photos and X-rays are from the clinic’s records. Treatment plans and results differ for every patient; only an examination can show what is possible for you. A tooth whitened from inside can darken again over time. Retreatment and crown preparation can cause temporary sensitivity or discomfort.

See more before and after cases →

Your dentists

English-speaking dentists in Seongnam

The clinic was founded by two brothers trained at Seoul National University who direct it together. Three further dentists hold Ministry of Health and Welfare specialist certifications. Full credentials →

Dr. Hyun Sung Park

Clinic Director

Co-founder and joint clinic director
DDS, Seoul National University School of Dentistry
Master’s degree, SNU Graduate School of Dentistry
Former staff, Dept. of General Dentistry, SNU Dental Hospital
Microendodontics Programme, SNU
Course completion, UCLA, USA
Member, UPenn Endodontics Study Club, USA
Certified Invisalign Provider
Osstem Implant AIC Programme
Member, International Congress of Oral Implantologists (ICOI)

Dr. Jin Young Choi

Dentist

Board-certified specialist, Advanced General Dentistry
Clinical training, Faculty of Dentistry, University of British Columbia, Canada
Master’s degree, Kyungpook National University Graduate School of Dentistry
BA in English Language and Literature, Korea University

Dr. Hyeonjoon Park

Clinic Director

Co-founder and joint clinic director
DDS, Seoul National University School of Dentistry
Master’s degree, SNU Graduate School of Dentistry
Former staff, Dept. of General Dentistry, SNU Dental Hospital
Affiliate Associate Fellow, American Academy of Implant Dentistry (AAID)
Certified Invisalign Provider; leads orthodontic treatment
Course completion, UCLA, USA
Member, UPenn Endodontics Study Club, USA
Member, International Congress of Oral Implantologists (ICOI)
Member, Seoul Prime Orthodontic Study Club

Dr. Yu Jin Kim

Dentist

Board-certified specialist, Advanced General Dentistry (Ministry of Health and Welfare)
Johns Hopkins University, USA
Master’s degree, SNU Graduate School of Dentistry
Former staff, Osaka University Dental Hospital, Japan

Dr. Min Ji Choi

Dentist

Board-certified specialist, Conservative Dentistry
Board-certified specialist, Advanced General Dentistry
Internship and residency, Jeonbuk National University Dental Hospital
Master’s degree in Conservative Dentistry, Jeonbuk National University

Whitening After Root Canal: frequently asked questions

How much does internal bleaching cost?

Whitening after root canal (internal bleaching) is published at ₩165,000 per tooth, VAT included. Your dentist confirms the fee after examination.

Will regular whitening fix one dark tooth?

Usually not on its own, because the stain is inside the tooth. Professional whitening (₩385,000) lightens the outer surface of the teeth generally and may be combined with internal bleaching.

How many visits does it take?

It usually takes more than one visit, and the number depends on how the tooth responds. Your dentist reviews the shade at each visit.

Will the tooth stay white?

Not necessarily. The color can darken again over time, and some patients repeat bleaching or later choose a veneer or crown.

Can any root-canal tooth be bleached?

No. It needs a sound root canal filling and enough healthy tooth structure. If the root filling needs redoing, that comes first and is quoted after examination.

Is a veneer or crown better?

They are more predictable for some teeth but remove more tooth structure. A veneer is ₩600,000 (VAT included) and a front zirconia crown ₩550,000; your dentist explains which suits your tooth.

Who will treat my tooth?

Root canal and restorative work at the clinic usually go to Dr. Min Ji Choi, a specialist in Conservative Dentistry and Advanced General Dentistry.

Related treatments and guides

Root Canal Teeth Whitening Veneers Dental Crowns Stained Teeth: Whitening, Resin Bonding, or Both Cosmetic Bonding

Ask about a dark tooth

Tell us which tooth has darkened and whether it had root canal treatment, and when. We will arrange a free consultation and explain your options in English.

Message us Call +82-31-757-1525

Visit

Visit us: Taepyeong Station Exit 5, Seongnam

2–3F, 1225 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do (Taepyeong Station Exit 5)

Monday – Wednesday	09:30 – 20:30
Thursday	09:30 – 19:00
Friday	09:30 – 18:30
Saturday	09:30 – 13:00
Sunday	Closed
Public holidays	Open
Lunch break	None — continuous hours

Parking garage in the building; parking benefits for patients receiving treatment.

Directions from Taepyeong Station Exit 5 → · Naver Map

Entrance sign of The Seoul Dental Clinic