How Long Does It Take to Correct an Underbite with Braces? Treatment Duration by Severity Level

Hello, an underbite not only affects facial aesthetics but also directly impacts chewing function and occlusion. One of the biggest concerns many patients have when researching orthodontic treatment is how long underbite braces take, whether the treatment duration is lengthy, and whether additional surgery may be required. I will explain each aspect in detail from a professional perspective so you can better understand and proactively prepare before treatment.

What Is an Underbite? Common Levels of Severity

My answer is as follows: an underbite is a condition of reverse bite (Class III malocclusion), in which the lower teeth extend in front of the upper teeth when biting down. Medically, an underbite may originate from the teeth, the jawbone structure, or a combination of both.

In mild cases, the underbite is mainly caused by misaligned teeth or incorrect tooth angulation, resulting in the lower teeth overlapping the upper teeth. In moderate to severe cases, the condition is often related to excessive growth of the lower jaw or underdevelopment of the upper jaw. Determining the exact severity of the underbite is an important factor that allows the orthodontist to accurately predict the treatment duration for underbite braces and select the most appropriate treatment approach.

How Long Does It Take to Correct an Underbite with Braces?

Regarding the question how long underbite braces take, the direct answer is that treatment generally ranges from 18 to 30 months, depending on the cause and severity of the underbite.

If you are wondering how long it takes to treat an underbite with braces when the condition is caused primarily by dental factors, treatment is usually shorter, around 18–24 months. For more complex underbite cases, especially those caused by skeletal discrepancies, the treatment duration for underbite braces may be longer and require several clearly defined treatment stages. The exact timeframe can only be determined after a clinical examination, radiographic imaging, and bite analysis by an orthodontist.

Factors Affecting the Duration of Underbite Orthodontic Treatment

My explanation is as follows: the duration of underbite orthodontic treatment is not the same for everyone. It depends on multiple factors related to the teeth, jawbone structure, and the patient’s cooperation throughout treatment.

Clinically, the most influential factors include:

• Cause of the underbite: Dental underbites are generally corrected more quickly than skeletal underbites.
• Initial severity of the underbite: Mild underbites with minimal bite discrepancies usually require less treatment time.
• Age at the start of treatment: Younger individuals generally respond more favorably to orthodontic treatment.
• Orthodontic method used: Traditional braces provide excellent force control for complex underbite cases.
• Patient cooperation: Wearing elastics as instructed and attending scheduled follow-up visits help maintain treatment progress.

The combination of these factors ultimately determines how long underbite braces will take in each specific case.

Cases Requiring Combined Jaw Surgery

According to medical standards, not all underbite cases require surgery, but jaw surgery becomes necessary when the underbite is primarily caused by skeletal abnormalities.

Common indications include:

• Excessive development of the lower jaw relative to the upper jaw
• Severe underbite causing obvious facial deformity
• Significant malocclusion affecting chewing function
• Cases where braces alone cannot improve the jaw relationship

For these patients, treatment typically includes:

• Pre-surgical orthodontic treatment to align the teeth
• Orthognathic jaw surgery
• Post-surgical orthodontic treatment to finalize the bite

Therefore, the treatment duration for underbite braces is longer when surgery is involved, but it provides comprehensive correction and long-term stability.

How to Shorten Underbite Braces Treatment Time

I would like to emphasize that whether your underbite is mild or severe, you can still optimize the treatment timeline by cooperating well throughout the treatment process.

Several factors can help reduce treatment time:

• Strictly follow the orthodontic treatment plan prescribed by your orthodontist
• Wear orthodontic elastics or auxiliary appliances as instructed
• Attend follow-up appointments on schedule and avoid delaying adjustments
• Maintain excellent oral hygiene to prevent gum inflammation that may slow progress
• Avoid dislodging brackets or breaking archwires due to improper eating habits

When these factors are well controlled, the underbite correction process can proceed on schedule, safely, and with optimal results.

If you are still wondering how long underbite braces take for your specific condition or are unsure whether jaw surgery may be necessary, you can visit Gangwhoo Cosmetic Hospital for a direct consultation with an orthodontist. Here, orthodontic and braces services are designed according to standardized medical protocols and personalized for each level of underbite severity, helping you achieve safe, effective, and long-lasting treatment outcomes.