Great Maxilla gives Great Jaws

Proper forward and wide development of the maxilla "unlocks" the lower jaw (mandible), allowing it to reach its full genetic potential. 

As the maxilla grows forward, the mandible is carried forward with it passively. It responds to neural signals provided by teeth lightly touching, lips sealed and tongue-on-the palate oral posture. 

An underdeveloped or narrow maxilla can physically block the mandible from moving forward, leading to a recessed chin or deep bite. 

As the mandible follows a well-developed maxilla forward, new bone is deposited at the back of the jaw (the ramus), increasing its overall length

A well-developed maxilla provides the vertical and horizontal tension necessary to define well the jawline:

By pulling the lower jaw forward, a developed maxilla creates a cleaner transition between the jaw and the neck, reducing the appearance of a "double chin" or sagging skin. There is better neck- jaw separation, which contributes to a more youthful appearance. 

Forward growth of the maxilla and mandible tightens the soft tissues along the jawline, making the mandibular border (the edge of the jaw) more visible and distinct, giving a Sharper Mandibular Angle

Proper skeletal support prevents the midface from collapsing, which keeps the skin of the lower face taut and minimizes the formation of jowls. Proper tongue posture, which is highly correlated with a well developed maxilla (it actually causes the maxilla to develop well) also lifts the hyoid bone, further minimising the sagging submental pouch (an early form of double chin). 

Good maxillary development often involves a "counter-clockwise rotation" of the entire facial complex: 

This rotation can reduce excessive vertical height in the lower third of the face, preventing a "long face" appearance.

As the mandible rotates up and forward (autorotation), the chin becomes more prominent and "square" without the need for implants or fillers for both men and women. 

The maxilla acts as a physical "tent pole" for the face:

As mentioned above, proper tongue posture against a wide palate / maxilla activates the suprahyoid muscles, which provides an immediate lift effect to the floor of the mouth and sharpens the jawline angle. Proper swallow pattern, already feature of healthy maxillary development, prevents the over-activation (and overgrowth) of the cheek muscles, which often gives the “chubby face” look. 

Outstanding maxillary development supports the upper lip positioning and higher cheekbones, ensuring that the lower face doesn't appear bottom-heavy.

A good midface development and relationship between the two jaws has significant health implications: 

When the maxilla is properly developed, the mandible can sit in a natural position which avoids compressing the temporomandibular joints (TMJ).

Healthy, forward development of both jaws pulls the tongue and soft tissues away from the throat, creating a more open airway and significantly reducing the risk of snoring and sleep apnea