[Measuring the accuracy of various elastomeric impression materials using a CNC coordinate measuring device (Part 1)].
This study compares the accuracy of 23 impression materials. With each material seven impressions of a stainless steel master die were taken under standardized conditions. Characteristical dimensions of the master die and of the stone dies as well were determined by means of a CNC coordinate measuring device. Differences in prepared tooth heights ranged between -36 and +19 microns. The occlusal distances between prepared teeth were 2 to 54 microns greater on the stone dies than on the master die. Diameters differed by -89 to +52 microns. The two phase impressions tended to result in stone dies of reduced size, whereas single phase and double mix impression techniques produced larger stone dies than the master die.
Wichmann
M
M
Zentrum Zahn-, Mund- und Kieferheilkunde der Medizinischen Hochschule Hannover.
Borchers
L
L
Limmroth
E
E
D003760:Dental Impression Materials; D003761:Dental Impression Technique; D008422:Materials Testing; D012826:Silicone Elastomers
D003760:Dental Impression Materials; D012826:Silicone Elastomers
Bestimmung der Abformgenauigkeit verschiedener Elastomere mit Hilfe einer 3D-Koordinatenmessmaschine. (Teil 1).