Overnight, saliva decreases and bacterial counts increase. As a result, continuous denture wear may lead to denture stomatitis, redness, and irritation of the palatal tissues.
Poor hygiene of dentures also contributes to denture stomatitis. Plaque and calculus collect on dentures just as on natural teeth.
Felton D et al. Evidence-based guidelines for the care and maintenance of complete dentures. A publication of the American College of Prosthodontists. JADA. 2011;142(2 suppl): 1s-20s.