Here’s another study showing that a significant percentage of children are found to have sleep-disordered breathing. Researchers in Finland found that 1 in 10 children suffered from either obstructive sleep apnea or snoring. What was different about this study compared to other studies is that obesity wasn’t the main reason that correlated with a sleep-breathing disorder. Rather, it was their dental occlusion, or how their upper and lower teeth fit together, as well their facial shapes.
This is exactly what I’m seeing in young children with sleep-related breathing disorders. They are not usually overweight, but have narrow faces with recessed jaws, and a high arched hard palate.
Considering that resistance to airflow increases exponentially as the diameter decreases (inversely to the 4th power, see Hagen-Poiseulle equation), even minor changes in our jaw structures can have huge consequences when it comes to breathing, especially when our upper airways are susceptible to collapse in multiple areas.