AI-translated archive post

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho

Yonsei Baro Dental Clinic · 치과미슐랭 · January 29, 2026

Hello. This is Apgujeong Orthodontic Clinic. Today, I’d like to introduce a cost-effective treatment for children’s malocclusion. It is PreOrtho. ​ 25.04~25.12 It works similarly t...

AI translation notice

This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Yonsei Baro Dental Clinic

Original post date: January 29, 2026

Translated at: April 20, 2026 at 6:08 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Hello.

This is Apgujeong Orthodontic Clinic.

Today, I’d like to introduce a cost-effective treatment for children’s malocclusion.

It is PreOrtho.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 1

25.04~25.12

It works similarly to the expensive Frankel appliance, but it has the advantage of not requiring an impression, and because it is a ready-made product, it is much more affordable. However, PreOrtho is an appliance that is difficult to use if you have rhinitis.

It looks like I’ve already reached the conclusion of today’s topic.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 2

25.04

This is a 7-year-old child who came in with the front teeth biting in reverse.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 3

This is an anterior crossbite in which the upper teeth, as a whole, bite in reverse against the lower teeth.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 4

Due to lack of space, the front teeth had come in like crowded teeth.

As a result of skeletal analysis on the X-ray, it was not a bony underbite, so we recommended PreOrtho treatment, and the child wore the appliance diligently for two months.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 5

25.06

Two months later, the anterior crossbite of the front teeth had been resolved.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 6

25.06

You can see that the front teeth, which had been out of alignment like crowded teeth, have moved back into place quite a bit, right?

PreOrtho does not perfectly align the front teeth, but it does have some effect in guiding them.

However, as the name Pre-Ortho suggests, it is an appliance used to relieve conditions such as anterior crossbite before full-scale orthodontic treatment, so orthodontic treatment will definitely be needed later.

Malocclusions such as anterior crossbite negatively affect jaw growth and can damage the front teeth, so they should be corrected quickly. When the child is still too young for orthodontic treatment, <PreOrtho> can be a useful appliance.

After the crossbite is resolved, PreOrtho is worn only while sleeping, like a retainer.

This is what it looked like at the 3-month regular checkup.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 7

25.09

The front teeth bite has been well maintained, and

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 8

25.09

The front teeth that had been out of alignment are arranged more neatly than they were three months ago.

Let’s compare before and after.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 9

25.04~25.09

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 10

25.04~25.09

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 11

25.04~25.09

For this child, once the baby teeth fall out and the permanent teeth come in, we plan to begin full orthodontic treatment using Invisalign First, a clear aligner for children. At present, the child is under regular observation every three months.

Let’s compare the facial appearance at the first visit and at the regular checkup.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 12

25.04~25.12

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 13

25.04~25.12

I hope this post is helpful information for parents who are worried about anterior crossbite.

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 14

Treatment of an Anterior Crossbite Malocclusion in a 7-Year-Old Child with PreOrtho image 15