The lower face plays a central role in facial aesthetics and structural harmony. Among its components, a critical and distinct features define the appearance and function of the jaw area is Jaw Shape.
Jaw Shape
Definition
Jaw shape refers to the overall geometric form of the mandible as viewed from the front, focusing specifically on the jawline arc and gonial region (the area near the jaw angle). It captures the stylistic curvature or angularity of the lower jaw, independent of how the chin protrudes, narrows, or rounds. This classification is rooted in bone structure and represents how the mandible curves from the ear to the lower face, regardless of soft tissue coverage.
Classification
1. Square Jaw
- Jawline path: Vertical descent from ear followed by a horizontal base.
- Gonial angle: Sharp and broad. ~90°.
- Visual impression: Strong, boxy mandible.
2. Angular Jaw
- Jawline path: Oblique line forming a distinct corner at the angle.
- Gonial angle: ~110°–120°.
- Visual impression: Structured, athletic, and defined.
3. Curved Jaw
- Jawline path: Smooth, concave arc from ear to chin base.
- Gonial angle: Rounded or minimally expressed.
- Visual impression: Feminine, soft, or youthful appearance.
4. Straight Jaw
- Jawline path: Linear slope from ear to jaw base with minimal curvature.
- Gonial angle: Subtle or flat.
- Visual impression: Flat, masculine, or mature look.
5. Cervicomental Blunting
- Jawline path: Obscured or untraceable due to soft tissue masking or skeletal retrusion.
- Gonial angle: Not visually identifiable.
- Visual impression: Blurred or recessed appearance. Jaw blends into the neck with minimal contour.