2008 Volume 42 Issue 2 Pages 137-142
The compressive impression method, which takes into consideration occlusal pressure during function, is generally used when taking impressions for complete dentures. However, the deformation of oral mucosa caused by pressure has not been clarified, and use of this method is often based on the dentist's experience and subjective judgment. We attempted to clarify the effect of the oral mucosa thickness on changes in load under occlusal force. We measured the thickness of oral mucosa under occlusal force using a measurement system based on the ultrasonic pulse-echo method. Analysis of variance demonstrated that there were significant differences in the compression rate between the measurement regions (p<0.001).
