What is the Gonial Angle?


What is the Gonial Angle?

Medically Reviewed by Mohsen Talani, MD on November 27, 2023 | Written by CBAM Author


The human face is a symphony of various parts, each part contributes to the face unique beauty and character. Among these prominent landmarks is the gonial angle, a crucial determinant of facial harmony and attractiveness. This strategically positioned angle plays a significant role in shaping the jawline, influencing facial proportions and contributing to the overall perception of beauty.

Where is the Gonial angle?

The gonial angle, also known as the angle of the jaw, is situated at the junction of the horizontal ramus (the lower jawbone’s horizontal portion) and the ascending ramus (the vertical portion of the jawbone). It is typically identified as the lowest and most lateral point on the jawline, located approximately halfway between the earlobe and the chin.

From an anatomical point of view, the Gonial angle is formed by the ramus line which is the tangent to the posterior border of the mandible and he mandibular line which is the lower border of the mandible bone. Jensen E and Palling M called this angle, the Gonial angle in 1954 for the first time.

Gonial angle effect on facial beauty

Each part of the face individually affects the beauty of the face, but it cannot be denied that one of the most important parts of a beautiful face is the jaw. One of your duties as aesthetic medicine specialists is to create harmony and proportion between different parts of the face. The gonial angle plays a vital role in creating this harmony and proportion.

A strong and defined jaw can separate the face from the neck and make the face more attractive. Also, if the jaw and gonial angle are not well defined and correct, they make the person’s face look unattractive and aged. The gonial angle is widely recognized as a key indicator of youthfulness and attractiveness. A well-defined gonial angle, typically between 120 and 135 degrees, lends a sense of definition, structure, and balance to the jawline. It helps create a sculpted, V-shaped profile, considered an ideal aesthetic standard for both men and women.

Facial proportions and Golden ratio

The Golden Ratio, represented by the Greek letter Phi (ϕ), is an irrational number approximately equal to 1.618. It is found throughout nature, from the spiral arrangement of sunflower seeds to the proportions of the human body. Artists, architects, and designers have long employed the Golden Ratio as a guiding principle, believing that it creates a sense of balance, harmony, and visual appeal.

In Aesthetic medicine, the Golden Ratio has been used to analyze and evaluate the perceived attractiveness of the face. Studies have suggested that faces that adhere to certain Golden Ratio proportions are often judged to be more attractive. For instance, the distance from the hairline to the tip of the nose is often considered to be about 1.6 times the distance from the tip of the nose to the chin.

Numerous facial features have been linked to the Golden Ratio, including:

  • Facial Width: The ideal ratio between the width of the face and its length is estimated to be about 1.6:1.
  • Eye Ratios: The distance between the eyes and the distance between the inner corners of the eyes are also said to follow the Golden Ratio.
  • Nose-Lip Ratio: The ideal ratio between the length of the nose and the width of the upper lip is approximately 1.6:1.
  • Chin-Mouth Ratio: The distance from the chin to the bottom lip is often seen as about 1.6 times the width of the mouth.

While the Golden Ratio provides a general guideline for facial proportions, it is important to recognize that individual variation exists. Not everyone will perfectly conform to these proportions, and there is no one-size-fits-all approach to achieving facial harmony.

You should analyze each patient individually and plan your treatments based on their facial features. You need to gain skill and knowledge before starting your practice an aesthetic medicine. CBAM Injectable packages are the best way to improve your skill and knowledge. CBAM has 2 categories of injectable packages for aesthetic medicine practitioners. CBAM certified packages are for those who want to start their practice and are at the beginning of their aesthetic medicine journey. There is also an advanced injectables course which is suitable for more professional and experienced injectors. Learn more about CBAM injectable packages here.

The Gonial angle anatomical position

The gonial angle is anchored by two important anatomical structures:

  • Gonion: This is the exact point where the horizontal and vertical ramus of the mandible converge. It serves as a cephalometric landmark, a point of reference used in facial analysis and surgical procedures.
  • Body of the Mandible: This is the horizontal portion of the mandible, the base upon which the gonial angle is formed.

The gonial angle is further defined by two oblique ridges that run along its length:

  • Linea Obliqua Externa (LOE): This ridge runs from the gonial angle to the mandibular notch, a notch located near the anterior border of the ramus.
  • Linea Obliqua Interna (LOI): This ridge runs from the gonial angle to the mandibular foramen, an opening through which the mandibular nerve and blood vessels pass.

The Impact of Gonial Angle on Facial Proportions

The gonial angle plays a critical role in maintaining harmonious facial proportions. A well-positioned gonial angle helps balance the width of the jawline with the overall facial structure. A narrow gonial angle can make the jawline appear weak and undefined, while an overly pronounced gonial angle can contribute to a masculine or angular appearance.

The ideal Gonial angle

In men, a more pronounced gonial angle is typically considered more attractive. The ideal gonial angle for men is estimated to be between 120 and 135 degrees. This angle creates a defined, strong jawline that is considered to be masculine and attractive.

In the other hand, in women, a slightly less pronounced gonial angle is more attractive. The ideal gonial angle for women is described as being between 125 and 130 degrees. This angle creates a softer, more rounded jawline that is considered to be feminine and graceful.