We had an older man who had a rather sudden change in status; he became lethargic, was unable to swallow, and in the period of about 24 hours was gurgling and having obvious respiratory distress. A CXR showed his lower plate hooked in his throat; they were ill-fitting and apparently he'd partially swallowed them while he was sleeping. An emergency scope removed the plate and he eventually recovered (he did end up with pneumonia after attempts to feed him during this time caused him to aspirate). It was a close call. Since then, I always ask my patients to remove their teeth before bedtime, especially in those who've lost weight or had other changes that would cause their dentures to not fit properly.