Reply #56: From what I understand, having no teeth in lower jaw means your jaw bone will become much thinner [View All]

[uppityperson]

having teeth there, having to hold teeth there, keeps your jawbone nice and sturdy. It is more of a problem with lowers since your jaw bone is much smaller than your skull which holds the top teeth. This was explained to me as a big reason people's lowers need refitting over the yrs, as your bone gets smaller, and why people with lower dentures are more apt to have a broken jawbone than those with teeth.