Evaluation of accuracy of the wash impression technique to rebase and replace the resilient part of a soft-lined denture.
The dimensional inaccuracies that might be introduced during a wash impression technique within a heat-cured acrylic resin tray lined with a silicone resilient denture base material were investigated with the use of an electronic digitizer. Casts were poured from impressions of a machined metal die using a light- and heavy-bodied addition silicone in the soft-lined tray and compared with casts poured from impressions made in a hard-based tray and with the master die itself. The dimensions of the casts poured from the heavy-bodied impression in the soft-lined trays were significantly different from those poured from impressions in the hard-based tray when compared with the metal die. Those produced from the light-bodied material showed no statistically significant dimensional difference.
Burrell
C J
CJ
Oral Surgery Department, York District Hospital, England.
Russell
M D
MD
Stewart
J
J
D000180:Acrylic Resins; D002133:Calcium Sulfate; D002138:Calibration; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique; D003819:Denture Bases; D003822:Denture Liners; D003823:Denture Rebasing; D003824:Denture, Complete; D005069:Evaluation Studies as Topic; D003765:Models, Dental; D012828:Silicones / Q000737:chemistry; D013499:Surface Properties; D014783:Viscosity
D000180:Acrylic Resins; D003760:Dental Impression Materials; D012828:Silicones; D002133:Calcium Sulfate