A short summary of the strongest evidence tying masticatory load to jaw shape and airway. The takeaway is not surprising if you have watched a face change on a hard-food diet. The interesting part is how quickly it shows up.
What the studies measured
Bite force, gonial angle, ramus length, and airway volume, across populations with different food textures. The cross-sectional data is old but consistent; the intervention data is newer and smaller.
What that means in practice
Load matters. Frequency matters more than intensity. The window where structural change is realistic is wider than most people assume and starts to close after the twenties, but it does not slam shut.
