Reappraisal of the physics of denture retention

Theories of denture retention have suffered from confusion of model, algebraic errors, and misapprehension of the physics of capillarity, adhesion and cohesion, as well as the role of atmospheric pressure. The rheology of some simple models is set out in context, and the dynamic nature of the problem is emphasized. The importance of a well-fitting denture base is confirmed. A number of points for further investigation are identified.