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Front teeth with dotted lines and arrows indicating the extent of gum exposure when smiling
Gummy Smile does not have a single cause. Whether the gums are covering the teeth, the muscles that elevate the upper lip are overdeveloped, or the alveolar bone is overdeveloped — each condition calls for a different treatment approach.
New York Yonsei Dental Clinic at Gangnam Station · Gummy Smile

Gummy Smile

If your gums show a lot when you smile

Even with the same Gummy Smile, the appropriate treatment differs depending on the cause. Gum Contouring

One-line summary

Gummy Smile refers to a condition in which the upper gums are excessively exposed when smiling. At New York Yonsei Dental, we first identify the cause using X-rays and clinical findings, then recommend Gum Contouring if the gums are covering the teeth, or Lip Repositioning if the levator labii superioris muscle is overdeveloped. Depending on the case, alveolar bone recontouring may also be considered together if the alveolar bone is overdeveloped.

Key points

  • The causes are divided into three categories: gums, lip muscles, and alveolar bone
  • Differentiation is made using X-rays and clinical findings
  • If the gums are covering the teeth, we look at Gum Contouring
  • If the levator labii superioris muscle is the cause, we look at Lip Repositioning
  • Depending on the case, alveolar bone recontouring may also be considered together if the alveolar bone is overdeveloped
Definition

We first identify what the cause is

01

When the gums are the cause

When there is an excessive amount of gum tissue covering the teeth, the teeth appear short and crowded. In this case, we look at Gum Contouring to reshape the gum line. The approach is based on the concept of revealing the original size of the teeth that have been covered by the gums.

02

When the muscles are the cause

When the levator labii superioris muscle is overdeveloped and the upper lip curls upward when smiling, more of the gums become exposed. In this case, we look at Lip Repositioning, which reduces the distance the upper lip travels when it rises.

03

Alveolar Bone

In some cases, the alveolar bone surrounding the tooth roots is overdeveloped. Depending on the case, alveolar bone recontouring may also be considered, and that determination is made after confirming the alveolar bone with X-rays.

04

When the skeletal structure is the cause

If there is severe overdevelopment of the upper jaw bone (maxillary excess), orthognathic surgery is the appropriate treatment. When the lip muscles and skeletal structure are both involved, Lip Repositioning may be considered first depending on the degree of concern.

05

Common Misconceptions

Many people assume that a single procedure will make the gums completely invisible. Since the outcome depends on the underlying cause, we first confirm this through a diagnosis.

First, let's identify what the cause is

We will guide you while reviewing your current condition together using X-rays and a mirror.

We explain all possible causes

New York Yonsei Dental does not explain only one cause. We will tell you whether it is the gums, lip muscles, or alveolar bone, and you, the patient, will decide what to proceed with.

During the explanation, we look at X-rays and a mirror together. We discuss while you directly see where your current gum line is and how much of your teeth are covered.

Monitor screen in the consultation room explaining the causes of Gummy Smile
Process

What happens on the day of your visit

01

Reservation

Visit after booking an appointment

02

Imaging

Panoramic X-ray

03

Diagnosis

Differential Diagnosis

04

Explanation

Review together with a mirror

05

Choice

Patient makes the decision

06

Procedure

Performed on the same day

07

Progress

Recovery Guide

Walk-in visits without an appointment may result in a significant wait time.

Appointments are required for all visits.

Front teeth with the gum line marked in dotted lines

Cases where it is not recommended

Proceeding when it is not the right case may result in lower satisfaction. This applies when the upper jaw bone is severely overdeveloped and orthognathic surgery is indicated, or when the Gummy Smile is not severe.

Lip Repositioning is also not recommended when the depth of the oral vestibule is found to be insufficient during examination. This is because satisfaction may be low even if the procedure is performed. That is why we look at the diagnosis first.

Continue reading · Learn more about Lip Repositioning

Compare

Gum Contouring and Lip Repositioning

Tray containing instruments used in treatment

When the Gums Cover the Teeth

It is a procedure approached with the concept of reshaping the gum line to reveal the true, original size of teeth that have been covered by excess gum tissue.

  • Duration

    It takes approximately 20 to 30 minutes.

  • Anesthesia

    Performed under local anesthesia using an anesthesia device

  • Recovery

    Most daily activities can be resumed on the same day; gum recovery takes approximately one week

Results vary by individual

Front teeth showing the height of the gum exposed when smiling

When the Upper Lip Curls Upward

This procedure shortens the path along which the upper lip rises, reducing the amount of gum exposed when smiling.

  • Duration

    The procedure takes approximately 40 minutes

  • Anesthesia

    Performed under local anesthesia using an anesthesia device

  • Daily Activities

    Most daily activities can be resumed on the day of the procedure

  • Recovery

    Full recovery takes approximately 2 to 4 weeks, and individual results may vary

If you are wondering which option is right for you

We will advise you after examining your alveolar bone with an X-ray. If you make an appointment, your consultation will begin on the same day.

Treatment

It is divided into four categories

Gum Contouring Guide — Front teeth with the gum line marked in dotted lines

Gum Contouring

This is a procedure that reshapes the gum line when the gums cover a large portion of the teeth, causing them to show when speaking or smiling.

Lip Repositioning Guide — A tray containing instruments used during the procedure

Lip Repositioning

This procedure is considered when a well-developed upper lip elevator muscle causes the upper lip to curl upward. It directly addresses the underlying cause.

Alveolar Bone Recontouring Guide — Front teeth with gum exposure height indicated

Alveolar bone recontouring

In some cases where the alveolar bone is overdeveloped, alveolar bone recontouring may also be considered. A decision is made after evaluating the alveolar bone via X-ray.

Guide for Combined Procedures — Consultation room monitor screen

When Performed Together

If both the gums and the lip muscles are contributing factors, Gum Contouring and Lip Repositioning can be performed together.

Start by Checking Your Current Condition

Even if you have no prior records, you can comfortably start by having your current condition captured on imaging.

What Is Gummy Smile

Gummy Smile is a condition in which a significant amount of the upper gums is visible when smiling

일반적으로 웃을 때 윗니 위로 드러나는 잇몸이 3mm를 넘으면 잇몸 노출이 있다고 봅니다. 다만 이 숫자가 절대적인 기준은 아닙니다 — 얼굴 비율과 치아·잇몸의 조화를 함께 고려해 진단합니다.

Treatment is not determined solely by how much of the gums are visible. The key factor is what is causing the gums to show.

Continue reading · Gingivectomy Lip Repositioning

Different Causes Require Different Treatments

When the Gums Are the Cause

  • Excess gum tissue covering the teeth makes the teeth appear short
  • The gum line may also appear uneven in some cases
  • Gum Contouring is considered
  • Whether the alveolar bone is overdeveloped is assessed via X-ray

·Gingivectomy Teeth Whitening

When the Muscle Is the Cause

  • The upper lip curls upward when smiling
  • This occurs when the upper lip elevator muscle is overdeveloped
  • Lip Repositioning is considered
  • Unlike Botox, you can expect lasting improvement.

·Lip Repositioning Meet Our Medical Team

If the cause is skeletal — meaning the upper jawbone is significantly overdeveloped (maxillary excess) — orthognathic surgery is the appropriate treatment.

Continue reading · How are combined cases evaluated?

How is the diagnosis made?

01

X-ray

A panoramic X-ray is used to examine the tooth roots and the shape of the alveolar bone. Whether the alveolar bone is overdeveloped determines the course of treatment.

02

Clinical Findings

We examine the position of the gum line and the extent to which the teeth are covered. In some cases, there may be more than one cause.

03

Mirror

During the explanation, we guide you while looking together in a mirror. Seeing your current condition directly makes it much easier to understand.

The diagnosis is made using X-ray images and clinical findings. We do not ask you to smile during the examination.

·Gingivectomy Lip Repositioning Teeth Whitening Directions

What to Prepare Before Your Appointment

There is not much to prepare. Simply think through what is bothering you before you come. For directions and office hours, Getting Here

1 What Is Bothering You

Please let us know whether too much gum shows, whether your teeth look small, or whether it only bothers you when you smile broadly — even if it feels fine otherwise.

Depending on which of these three applies, the area we examine will differ — Gums Muscle Bone The decision on what to proceed with is yours to make.
2 Reservation

Walk-ins may experience significant wait times. If you make an appointment in advance, we will schedule you at a time that works for you.

3 Imaging

On the day of your visit, a panoramic X-ray is taken and a clinical examination is performed to assess your suitability.

Even if you have no prior records, you can comfortably start by having your current condition captured on imaging. Imaging It is performed when necessary.
4 Explanation

We will explain every possible cause in full.

5 Choice

You decide what procedure to proceed with. We show you everything you need to make an informed decision.

·Learn More About Gingivectomy Lip Repositioning

FAQ

Frequently Asked Questions

What Is a Gummy Smile?

웃을 때 윗잇몸이 많이 드러나 보이는 상태를 말합니다. 일반적으로 잇몸이 3mm를 넘게 드러나면 잇몸 노출이 있다고 보지만 절대적인 기준은 아닙니다. 잇몸이 보이는 정도는 사람마다 다르고, 그 원인도 잇몸·입술 근육·잇몸뼈로 나뉩니다.

How Is the Cause Determined?

The cause is determined through X-rays and clinical findings. A panoramic X-ray is used to examine the tooth roots and alveolar bone structure, while a clinical examination assesses the position of the gum line and the extent to which the teeth are covered. We do not ask you to smile during the examination. During the explanation, we will guide you while looking together in a mirror.

Can a Single Procedure Make the Gums Completely Invisible?

Many people assume this is possible, but the outcome depends on the underlying cause. We will first confirm this through diagnosis and then advise you on what can realistically be achieved.

Is Orthognathic Surgery Necessary?

If the cause is vertical maxillary excess, where the upper jaw is severely overdeveloped, orthognathic surgery is the appropriate treatment. If the cause is lip muscle, Lip Repositioning is the appropriate treatment. When both factors are involved, Lip Repositioning may be considered first depending on the patient's preference and tolerance.

Can Gum Contouring and Lip Repositioning Be Done Together?

If the cause involves both the gums and the lip muscles, both can be addressed together. We will advise you after confirming whether both factors are present during the diagnosis.

How Long Does Recovery Take?

After Gum Contouring, most patients can resume daily activities on the same day, and gum recovery takes approximately one week. After Lip Repositioning as well, most patients can resume daily activities on the day of the procedure. However, this does not mean you will return to your usual state immediately — swelling, discomfort, and other symptoms may vary from person to person. Full recovery generally takes about 2 to 4 weeks, with individual differences.

·Gingivectomy Lip Repositioning

Can I Receive Treatment on the Same Day?

When booking, please let us know if you would like same-day treatment, and we will proceed if your case is suitable. Even if you do not mention it, we will proceed on the same day if the schedule allows. Please note, however, that receiving treatment on the same day is different from recovering on the same day. Recovery timelines will be explained separately for each procedure.

·Directions About the Clinic Teeth Whitening

Can Gum Contouring Results Relapse?

There is a common misconception worth addressing here. Some say that recurrence is determined by the equipment used — this is not the case. The real deciding factor is whether the alveolar bone was assessed. If alveolar bone recontouring is needed but this is not evaluated before proceeding, there is a risk of recurrence.

·Gingivectomy About the Clinic

What is alveolar bone reshaping?

The alveolar bone is the bone surrounding the tooth roots. Depending on the case, if the alveolar bone is overdeveloped, alveolar bone recontouring may be considered alongside the procedure. This is an entirely different surgery from Alveoloplasty.

·View Gingivectomy Meet Our Medical Team

Will I experience tooth sensitivity?

Gum Contouring is not a treatment that exposes the tooth roots. Any sensitivity that does occur is usually temporary.

·View Teeth Whitening

Are there cases where you would not recommend it?

Yes, there are. Proceeding when the case is not appropriate may lead to lower satisfaction. This applies when the upper jawbone is significantly overdeveloped and orthognathic surgery is indicated, when the Gummy Smile is not severe, or when the vestibular depth is found to be insufficient during examination.

·Lip Repositioning

Can I visit without an appointment?

Walk-in visits may result in a significant wait time. We operate on an appointment basis, so booking in advance allows us to schedule you at your preferred time.

What will be shown during the consultation?

We guide you while reviewing X-ray images and looking together in a mirror. Seeing directly where your gum line currently sits and how much of your teeth is covered makes it much easier to understand. We explain every possible cause, and the decision on what to proceed with is yours to make.

·About the Clinic Medical Staff

What is the difference between Gum Contouring and Alveoloplasty?

They are entirely different procedures. Alveoloplasty is a procedure that reshapes the protruding portion of the alveolar bone, while Gum Contouring is a procedure that refines the gum line.

Does the director perform the procedure personally?

Director Son Young-woo personally handles everything from the initial consultation and surgery to post-operative care. We do not practice delegated treatment, where the responsible clinician changes midway through your care.

For inquiries, please contact us by phone.

Book a Consultation

If you book in advance, your consultation will begin on the same day you visit.

Quick Consultation

Your name, contact number, and treatment category are collected for the purpose of responding to your consultation and will be retained for 3 years after the consultation ends. You may still contact us by phone even if you do not consent.