https://www.nature.com/articles/s41598-019-40463-3

This is a link to the entire journal 

I only see them mentioning a shortening of the mandibular ramus taking place when incorporating a hard diet. If anything the increased masticatory stress should lead to a lengthening of the ramus as a result of inclination of the mandibular plane?

Posted by: Pame

I only see them mentioning a shortening of the mandibular ramus taking place when incorporating a hard diet. If anything the increased masticatory stress should lead to a lengthening of the ramus as a result of inclination of the mandibular plane?

It may widen it at the level of the masseters tho, I didnt read the whole thing but bone deposition isn't something that's that str8 forward.

Even esthetically speaking in humans, a longer ramus isn't ne essarily what looks or is the best thing. Bone thickness probably is the best look as it sorta shortens the face and makes it wider. 

Thank you for the find!

Regarding the ramus, it depends on what they call the ramus? If you are degenerate thus with a high gonial angle, the ramus is round and could be said "longer" than the same ramus but pointing straight down with a sharp 90° angle to the mandible.

I don't know, I feel like my ramus lengthened since the beginning of my journey, long ramus are seen in well developped persons and short/non existing ramuses are seen in poor developped people. Furthermore (what a coincidence) it is a beautiful feature. 

How to make sense out of it? 

Well, figure two and three on results tab says it all. 

The "shortening of the ramus" is more of a shortening of the total height of the mandible, i.e more compact one and thus reducing total face height. Moreover they note a developement of the "masseters ridge", which I remember Astrosky mentionned in one of his videos; after starting chewing hard gums he developped a "bony process" on the ramus, pointing out. Just my opinion but I think this ridge is particularly beautiful and add thickness and solidity to the face. 

It is welcomed to add that "Although large masticatory force may be harmful on the condyle and result in the shortening of the ramus, there was no erosion on the surface of the condyle of mice fed with HD (Fig. 4d,e). No obvious differences in the cartilage and subchondral bone were observed (Fig. 4e), indicating that the increased mastication by the HD affects the mandibular bone morphology without damaging the cartilage in the condyle."

I can agree with this because a few months ago my ramus was like really lengthen downwards and less forwards no my ramus slightly decreased in downwards length and increased in forwards length, and my prognathic jaw got less so this means my jaw is a little more upright which gives the mandibular plane a more upwards look.

@bogdar Wouldn't a shortening of the mandible mean a reduction in posterior third height? Which really isn't a positive for males. Whats desirable is a reduction in midface height. 

Are you able to find the Astro video you were referring to? In regards to the bony process on the ramus, Im guessing you mean something like this?

I find it strange that theres no specific mentioning of mandibular widening occurring. Would be very strange if that did not take place at all.

Posted by: Pame

@bogdar Wouldn't a shortening of the mandible mean a reduction in posterior third height? Which really isn't a positive for males. Whats desirable is a reduction in midface height. 

 

Are you able to find the Astro video you were referring to? In regards to the bony process on the ramus, Im guessing you mean something like this?

I find it strange that theres no specific mentioning of mandibular widening occurring. Would be very strange if that did not take place at all.

I think so, I don't know exactly how it would affect the looking tho. If there's something that reduces face's height I take it. In addition my mandible and every "high gonialed" mandibles go too far down, and I wonder how much it would help by "reducing mandible height". 

Regarding the "masseteric ridge" I think as they called it, what you are showing me are the masseters themselves. Eventho the ridge is associated with strong masseters thus when it is presents you also have good masseters, it is not what is on the photos.

I'm talking about what you can see on this picture, the "angle" part, just where the masseter is. It is the down part of the ramus, where a little "ridge" can be created.

For the video I honestly don't remember, and my computer is lagging too much for me to quick research, I only remember that he was talking about chewing. It was some months ago

Very interesting! Thanks for the find, and for having such a great discussion.

I also saw them mentioning that chewing released IGF-1 in the bone cells in the mandible. However Im wondering if this IGF-1 can only be used in these cells, or if its usable for the entire body? There was another user here who mentioned he gained significant muscle mass (without exercising), grew taller and even experienced penile enlargement supposedly as a result of a chewing muscle strengthening routine.