Comparison of the dimensional accuracy of one- and two-step techniques with the use of putty/wash addition silicone impression materials.
This study compared the putty/wash one-step and two-step techniques for making addition silicone impressions. For each technique 15 impressions were made of a stainless steel base to which three tapered posts were attached. Stone models were made of all impressions. The results indicated that the interabutment distances increased slightly compared with the stainless steel model for both techniques, but the differences between techniques were not considered to be clinically important. The intraabutment measurements for the abutment without undercut increased, whereas abutments with undercuts decreased. These variations from the stainless steel model were also clinically insignificant.
Idris
B
B
Department of Restorative Dentisitry and Periodontology, Dental School, Trinity College, Dublin, Ireland.
Houston
F
F
Claffey
N
N
D002133:Calcium Sulfate; D000044:Dental Abutments; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique; D003765:Models, Dental; D011145:Polyvinyls / Q000737:chemistry*; D011176:Post and Core Technique; D012826:Silicone Elastomers / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry*; D013193:Stainless Steel; D013499:Surface Properties
D003760:Dental Impression Materials; D011145:Polyvinyls; D012826:Silicone Elastomers; D012833:Siloxanes; C034183:vinyl polysiloxane; D013193:Stainless Steel; D002133:Calcium Sulfate