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Mangudong Dental Clinic | Why Does the Orthodontic Treatment Period Differ from Person to Person?

에스(S)리더치과병원 건대입구역, 서울 광진구 소재 · S리더치과병원 · January 20, 2026

Hello, this is S Leader Dental Hospital, Mangudong Dental Clinic. One of the first things many people wonder about after deciding on orthodontic treatment and visiting a clinic is...

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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: 에스(S)리더치과병원 건대입구역, 서울 광진구 소재

Original post date: January 20, 2026

Translated at: April 24, 2026 at 1:17 AM

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

Hello, this is S Leader Dental Hospital, Mangudong Dental Clinic.

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One of the first things many people wonder about after deciding on orthodontic treatment and visiting a clinic is the “treatment period.”

“When will I be able to remove the appliance?”

“I only want to straighten my front teeth a little. Will it take long?”

“I heard it only takes a year…”

But there is no single answer.

Orthodontic treatment is not simply a process of attaching and removing an appliance. It is a highly precise, long-term treatment process in which all factors are interconnected, including bone structure, tooth position, gum condition, jaw joint function,

and even the patient’s level of cooperation.

Today, Mangudong Dental Clinic, S Leader Dental Hospital, will explain in detail from a specialist’s perspective why orthodontic treatment periods differ from person to person, what factors affect them, and what should be considered before treatment.

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If the pre-treatment condition is different, the treatment period will naturally be different as well.

The biggest factor affecting treatment duration is the condition of the teeth and jaw at the time orthodontic treatment begins.

▪ Complexity of the dental alignment

Simple protruding teeth or gaps between the front teeth may be completed within 6 to 12 months with partial or short-term orthodontic treatment, but if the teeth are severely crowded or the upper and lower jaws are significantly misaligned, the treatment period may extend beyond 2 years.

▪ Type of malocclusion

The more a malocclusion is related to jaw direction or size, such as deep bite (where the upper teeth cover the lower teeth), open bite (where the front teeth do not touch), or underbite (protruding jaw), the more treatment time may be required because not only the teeth but also the position of the jawbone must be adjusted.

▪ Presence of impacted teeth, wisdom teeth, or supernumerary teeth

If an impacted canine needs to be pulled into place, if the force from wisdom teeth needs to be removed, or if there are supernumerary teeth that need to be extracted, the preparation period before treatment starts becomes longer, and actual tooth movement also slows down.

In the end, even though the treatment is called the same “orthodontic treatment,” for one person it may be a “short-term adjustment that slightly moves the front teeth,” while for another it may be a “full project that corrects even the jaw position.”

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Age also matters. - Growing years vs. adult orthodontics

“Does it really finish faster if you do it when you’re young?” This is a question we hear often, and to some extent, it is true.

Because adolescents are still growing in their jawbones and facial skeleton, orthodontics can be performed by “guiding” the direction of growth.

In other words, since growth can be used as a tool to widen the jaw or adjust its position, desired results can be achieved more effectively and in a shorter time.

On the other hand, adults have already finished growing, so all orthodontic treatment becomes a process of physically moving the teeth within the bone. Force must be applied slowly, and because tissue recovery is slower than in adolescents, the overall treatment period is more likely to be longer.

Of course, being an adult does not mean treatment always takes a long time. If the alignment is relatively even and the malocclusion is not severe, there are many cases in which adult orthodontic treatment is completed within a year.

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Whether extraction is needed and the type of appliance also affect treatment speed.

Extraction orthodontics, where teeth are removed, vs. non-extraction orthodontics, where teeth are kept in place

These two approaches are completely different in terms of tooth movement distance and method.

▪ In extraction orthodontics

Because the molars must be pulled forward, the overall distance of tooth movement is longer, and root movement is also involved, so it takes more time.

In particular, in two-jaw orthodontic treatment involving extraction of four teeth, cases often require more than 2 years of treatment.

▪ In non-extraction orthodontics

Since the total number of teeth is maintained and space is created by expanding the dental arch or reshaping the teeth themselves, the movement distance is relatively short, and treatment time is often reduced.

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▪ Small differences depending on the appliance

Self-ligating brackets vs. conventional brackets / clear aligners vs. lingual orthodontics vs. partial orthodontics: depending on the friction of the appliance, the way force is transmitted, and how orthodontic force is maintained, there can be differences in movement speed, and the replacement cycle of the appliance or the interval between visits may also have an effect.

💡 In particular, clear aligners produce faster and cleaner results when the patient cooperates well. On the other hand, if the appliance is frequently removed and wearing time is short, treatment may be delayed and take longer than planned.

Patient cooperation and lifestyle habits are also major variables

Orthodontic treatment is not a treatment that takes place only at the dental clinic. That is because, for most of the 24 hours in a day, the patient is the one managing and wearing the appliance.

Things that change depending on the patient’s cooperation
Item
Clear aligners
Wearing elastics
Wearing retainers

In addition, all factors such as chewing hard foods, appliances frequently coming off, and cavities caused by insufficient brushing can affect the duration of orthodontic treatment.

In the end, orthodontics requires both the doctor’s plan and the patient’s execution to work together in order to achieve good results within the planned period.

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S Leader Dental Hospital’s precise diagnosis,

the standard for determining treatment duration

The reason a friend takes 1 year while I take more than 2 years is also what dentists describe as a “complicated reason,” but in the end, it comes down to the fact that each patient’s oral structure and lifestyle pattern are different.

Mangudong Dental Clinic, S Leader Dental Hospital, located near Konkuk University Entrance Station in Gwangjin-gu, Seoul, analyzes not only tooth alignment but also the temporomandibular joint, bone width, and gum health from multiple angles through the precise diagnosis of medical staff with a doctorate in orthodontics, and suggests an optimized orthodontic plan and treatment period for each patient.

We also offer various options such as clear aligners, partial orthodontics, and lingual orthodontics, and guide you to fast and efficient orthodontic methods depending on the treatment purpose.

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Start smoking cessation counseling at S Leader Dental Hospital

Orthodontic treatment is just as dependent on managing lifestyle habits during the treatment period as it is on appliance selection. In particular, smoking affects gum blood flow and the healing process, which can be a variable in the progress of orthodontic treatment.

Taking these factors into account, Mangudong Dental Clinic, S Leader Dental Hospital, provides smoking cessation counseling based on the patient’s oral condition and guides management directions so that orthodontic treatment can proceed more stably.

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