One of the most important but often overlooked design features in custom jawline implants that affects the neck is the vertical augmentation of the jaw angles (sometimes called vertical ramus lengthening). This can significantly influence neck contour and the cervicomental angle.
Why Vertical Jaw Angle Augmentation Improves the Neck
1. The jaw angle defines the posterior border of the neck
The gonial angle region (back corner of the jaw) forms the posterior boundary of the jawline when viewed from the side.
If the jaw angle is:
- short vertically
- underdeveloped
- high relative to the neck
then the neck tends to blend into the face. The cervicomental angle becomes blunted.
When the jaw angle is lower and stronger, it creates a clearer structural boundary between the face and neck.
2. Increasing vertical height lowers the mandibular border
Custom jawline implants can add vertical length to the jaw angle, effectively lowering the inferior mandibular border.
This does two things:
- Creates a deeper jawline shadow
- Moves the structural border of the face downward
This makes the neck appear tighter and more separated from the jaw.
3. Soft-tissue tension improves along the lateral neck
When the posterior mandible is lengthened vertically:
- the soft tissue along the lateral neck becomes more supported
- the platysma has a longer skeletal attachment line
- the upper neck tissues stretch across a larger frame.
This produces mild lateral neck tightening.
4. The cervicomental angle becomes sharper
The cervicomental angle (the angle between the neck and underside of the chin) is influenced by:
- chin projection
- mandibular border definition
- jaw angle height.
Vertical jaw angle augmentation helps by:
- lowering the jawline
- increasing contrast between jaw and neck
- improving the geometric transition between face and neck.
5. Why this matters more than width alone
Many people assume wider jaw angles improve the neck, but width mostly affects the frontal facial shape.
Neck contour is more strongly influenced by:
- vertical jaw angle length
- inferior mandibular border definition
- chin projection.
A wide jaw that is not vertically long may still leave the neck looking soft.
6. The “frame effect”
You can think of the mandible like the frame of a canvas.
If the frame is:
- small or high, the fabric hangs loosely below it
- larger and lower, the fabric stretches tighter.
By enlarging the frame—especially lowering the posterior corners—jawline implants tighten the soft tissues around the neck.
Why this design principle is important in custom implants
Stock implants typically:
- widen the jaw angle
- add limited projection.
Custom implants can instead add:
- vertical jaw angle length
- mandibular body definition
- continuous inferior border augmentation.
This continuous mandibular arc expansion is what maximizes neck improvement.
? Key takeaway
Vertical augmentation of the jaw angles improves neck contour because it:
- lowers the posterior mandibular border
- strengthens the jaw–neck boundary
- increases soft-tissue tension along the lateral neck
- sharpens the cervicomental angle.
Dr. Barry Eppley
Plastic Surgeon