V-line Without T-Osteotomy? The Shocking Secret of Long-Curve Square Jaw Surgery

Hello, this is BT Plastic Surgery!

These days, many people are considering “3-type facial contouring” surgery for a slimmer, more refined face shape.

At our clinic, we perform the “Personal Line” 3-type contouring procedure, which fully considers each person’s bone structure and needs to improve the cheekbones, square jaw, and chin in a balanced way.

When people usually think of chin surgery, they think of “T-osteotomy,” but today we’d like to take an in-depth look at a special method that completes the jawline all the way to the chin by smoothing the entire line with a “long-curve square jaw surgery” instead of T-osteotomy.

Why the square jaw is the key in 3-type contouring

3-type contouring improves the three major bony areas of the face at once: the cheekbones, square jaw, and chin.

Among these, square jaw surgery is the key area that determines the line of the lower face and affects both frontal and side-profile results.

Surgical area	Main improvement effect
Cheekbones	Reduces facial width, improves irregular lines (side cheekbones, 45-degree cheekbones)
Square jaw	Creates a smooth line from the angle near the ear to the front chin, reduces lower-face width
Chin	Improves the width, length, and position of the front chin (the “full stop” of the V-line)

The naturalness of the jawline changes depending on how the square jaw surgery is performed, and what we should focus on here is “long-curve square jaw surgery.”

What is special about long-curve square jaw surgery?

“Long-curve square jaw” refers to a surgical method in which the bone is cut in one long, smooth curve, starting from the angular bone area below the ear and extending to just before the front chin.

✔️ The biggest advantage of long-curve resection: no need to worry about a “secondary angle” ❌

• Conventional surgery: If only the angle under the ear is cut, a step in the bone called a “secondary angle” may form between the end of the resection line and the front chin.

This step can make the jawline look uneven and awkward from the front or side.

• Long-curve surgery: Because the bone is refined in one long, smooth curve, the jawline connects naturally and minimizes the occurrence of a secondary angle.

✔️ A soft finish without T-osteotomy of the chin!

• During consultations, many people say, “T-osteotomy feels like it involves too much bone work, so I’m hesitant.”

In such cases, if you simply want to reduce the width of the front chin without changing the chin’s length or position (recessed chin/protruding jaw), the long-curve resection method becomes a good alternative.

Category	T-osteotomy	Long-curve square jaw
Main purpose	Reduces the width of the front chin; adjusts length/position (advancement/retraction)	Smoothly connects the entire jawline; reduces the volume of the front chin
Surgical method	The bone is cut in a T shape, brought together, and fixed with metal pins	The jawline is resected in a long curve, then only the thickness of the chin is shaved down
Suitable cases	When recessed chin/protruding jaw is present, or when the front chin must be narrowed dramatically	When no change in chin length/position is needed and a natural line is preferred

Even without T-osteotomy, you can complete a slim and smooth V-line simply by extending the long-curve square jaw surgery to the chin and precisely shaving down the thickness of the front chin bone!

CHECK-LIST for safe surgery!

As important as a beautiful result is safety.

Since long-curve square jaw surgery deals with bone over a long area, be sure to check the following points.

📍 Precise 3D-CT analysis: The shape and thickness of the jawbone, and most importantly the location of the nerve line, are different for each person.

3D-CT analysis is essential to avoid nerve damage and to establish a safe resection range.

📍 Choose an experienced specialist: Long-curve resection requires the skill to smooth the bone in one motion,

so you should choose a specialist with extensive experience in contouring surgery across a variety of cases.

📍 Avoid excessive resection: Be cautious of clinics that unconditionally promote “maximum resection.”

If too much bone is removed, the remaining soft tissue may lose support, which can cause sagging cheeks or an unnatural line.

It is important to leave an appropriate amount of bone that can naturally support the remaining tissue.

Long-curve square jaw surgery is an effective way to complete a smooth, natural jawline without T-osteotomy of the chin.

However, the most suitable surgical plan varies depending on the patient’s facial condition and improvement goals, so we recommend receiving a careful one-on-one consultation and precise diagnosis with a specialist.

Thank you. 😊

All facial contouring surgeries at BT Plastic Surgery are

performed directly by Director Lee Ho-bin, a facial contouring specialist with 20 years of experience.

Before and after surgery, low-dose CT scans are used

to accurately identify and diagnose the patient’s facial condition.

In addition, the on-site anesthesiology director

monitors the patient’s condition in real time

to help ensure a safe surgery.

At BT, a safe clinic with no accidents,

we create beautiful faces that fit each patient perfectly.

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<These are real before-and-after photos of patients who underwent surgery by Director Lee Ho-bin of BT Plastic Surgery, and the photos were used with the patient’s consent.>

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