How maxilla positioning could affect jaw appearance.

[xeqri]

My theory is basically that if you have a forward grown maxilla and had enough testosterone in puberty you will certainly have an antegonial notch.

Because your maxilla grows forward, the start of your mandible is also forwardly grown and straight because the jaw needs to form an even bite ideally.

And then at puberty, testosterone makes your chin grow longer which gives men of average a longer face than women, and because the straightness of the maxilla and the need for a longer chin collide, the mandible starts growing down to accommodate the longer face.

Further, I believe this is a big determination in frontal jaw flare too.The part of the mandible that’s straight is where the masseter attaches, inward grown jaws are extremely rare and most people who have bad, non flaring jaws just have downgrowth where the masseter attaches.

That causes the muscle to stretch down at the part where it attaches to the mandible that’s further from the ramus.

What that does is make the front jaw view look more rounded because the muscle isn’t attached on a straight bone, rather than if you have that straight mandible at the part where the masseter attaches, and then it gives it a more flared appearance from the front because it lets the mass of the masseter gather at the gonial angle and bulge instead of being stretched down and have less bulging at one point.

 

[xeqri]

Now that I’m thinking, it probably means people with more forward maxillas also have a more rounder ramus, because the jaw also grows forward the point where the ramus meats the mandible is more further from the starting point of the ramus than in people whose maxillas grew down or not as forward which will then give a straight ramus.

This also matches with the fact that almost all women have that sloped ramus, and women have significantly more forward maxillas than men on average

 

[NoaA99]

You can have strong gonial eversion with a smooth jawline transition, meaning no visible antegonial notch.
Also, the maxilla is more susceptible to environmental influences and develops more slowly compared to the mandible. This is why some men have weak maxillas and Class III occlusions, while their mandibles develop significantly better.

 

[xeqri]

You can have strong gonial eversion with a smooth jawline transition, meaning no visible antegonial notch.
Also, the maxilla is more susceptible to environmental influences and develops more slowly compared to the mandible. This is why some men have weak maxillas and Class III occlusions, while their mandibles develop significantly better.

I didn’t say you have to have an antegonial notch to have a flared jaw, you just need the point of attachment of the masseter to the mandible to be relatively straight, so if you have a smooth transition but the mandible isn’t downgrown, that still applies, and I haven’t looked into this at all but it may be that people with a forwardly grown mandible and a smooth transition just have less vertical growth which then doesn’t show an antegonial notch or maybe it’s just too minor to see

 

[They_are_all_whores]

My theory is basically that if you have a forward grown maxilla and had enough testosterone in puberty you will certainly have an antegonial notch.

View attachment 3566739
Because your maxilla grows forward, the start of your mandible is also forwardly grown and straight because the jaw needs to form an even bite ideally.

And then at puberty, testosterone makes your chin grow longer which gives men of average a longer face than women, and because the straightness of the maxilla and the need for a longer chin collide, the mandible starts growing down to accommodate the longer face.

Further, I believe this is a big determination in frontal jaw flare too.The part of the mandible that’s straight is where the masseter attaches, inward grown jaws are extremely rare and most people who have bad, non flaring jaws just have downgrowth where the masseter attaches.

That causes the muscle to stretch down at the part where it attaches to the mandible that’s further from the ramus.

What that does is make the front jaw view look more rounded because the muscle isn’t attached on a straight bone, rather than if you have that straight mandible at the part where the masseter attaches, and then it gives it a more flared appearance from the front because it lets the mass of the masseter gather at the gonial angle and bulge instead of being stretched down and have less bulging at one point.

water is wet

 

[soggra]

women have significantly more forward maxillas than men on average

Source?