If the upper front teeth center line doesn’t match, is it facial asymmetry? [Examples of when orthodontic treatment is needed]

Hello.

This is Ceramics Dental Clinic, an orthodontic clinic near Hakdong Station.

When considering orthodontic treatment,

many people look at themselves in the mirror or at photos

and notice that the center line of the upper front teeth (midline)

does not align with the center of the face,

leading them to wonder,

“Could I have facial asymmetry?”

This is a concern that often brings people in for consultations.

Whether the misalignment of the dental midline is

simply a problem with tooth arrangement,

or whether it is related to facial asymmetry...

It can be hard to judge on your own, which can feel frustrating.

Today, we will explain step by step

the relationship between dental midline misalignment and facial asymmetry,

and look at the appropriate treatment direction for each situation.

Reasons the upper front teeth center line may not match

The reasons the upper front teeth center line is offset from the center of the face include

issues with the teeth and gums (dental causes) and

causes related to facial structures such as the jaw and nasal bone.

<Dental causes>

▶️ When the left and right teeth are different sizes

▶️ When crowding occurs on only one side, causing an unbalanced tooth arrangement

▶️ When tooth loss causes the dental arch to shift to one side

<Facial structural causes>

▶️ When the jawbone itself is asymmetrical on the left and right

▶️ Deviated nasal septum

: A condition in which the septum (nasal bone) that divides the nostrils is bent

If the cause is a structural facial problem,

a referral to another department such as otolaryngology or plastic surgery

may be needed depending on the situation.

However, if the bite does not fit properly

or the center line is shifted and affects facial balance,

creating a functional problem,

it may be improved with orthodontic treatment alone!

Dental midline vs. facial balance

Which is more important:

aligning the dental center line

or correcting facial balance?

The answer is that both are important,

but their purposes and standards are different.

Orthodontic treatment begins with aligning the facial center line

and the center line of the upper teeth.

That is the basis for creating a natural and harmonious sense of facial symmetry

when smiling.

As the next step,

the upper and lower center lines are aligned

so that they match.

However, an important point here is that

the upper and lower center lines do not necessarily have to match perfectly.

If the molars fit together stably and the center lines differ by less than 1 mm,

there is no need to move the teeth forcefully.

According to the standards of the Korean Association of Orthodontists,

a midline discrepancy within 1.5 mm left and right

is considered “normal occlusion.”

However, treatment may still be carried out to align the midline as much as possible

depending on the patient’s aesthetic needs,

so it is a good idea to discuss the specific treatment direction

thoroughly with the medical team.

A balanced face,

the core of orthodontics

Facial asymmetry that is noticeable to yourself

is not only an aesthetic concern but also a functional issue

that may require treatment.

In particular, if an imbalance in the bite has caused

the dental center line to shift,

orthodontic treatment can improve facial balance and the alignment of the teeth

at the same time.

If you are worried about facial asymmetry,

try to regain a more harmonious smile

and a balanced facial line

through an accurate diagnosis and customized orthodontic treatment.^^

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