January 25th, 2009 by admin

 Retention
 — Retention
Retention of an RPD can be achieved by:
• Using mechanical means such as clasps (1) which engage undercuts on
the tooth surface.
• Harnessing the patient’s muscular control (2) acting through the
polished surface of the denture.
• Using the inherent physical forces (3) which arise from coverage of the
mucosa by the denture.
Whether reliance is placed on all, or mainly on one of these
methods, depends on clinical circumstances. Retention by mechanical
means can also be obtained by selecting a path of insertion which
permits rigid components to enter undercut areas on teeth or on
ridges (Figs 23 and 26 of Part 4). Read the rest of this entry »