title: A comparison of dimensional accuracy between three different addition cured silicone impression materials.
abstract: Ten impressions of a metal implant abutment were made with each of three addition-cured silicone impression materials. Using the technique of co-ordinate metrology, the shoulder region of the abutment and corresponding regions of both impressions and dies made from these impressions were scanned and measured. Comparison of these measurements indicated that the mean dimension measured from the shoulder region for each group of impression materials was significantly different from those taken from the original metal implant abutment. However, when these impressions were cast in a gypsum based die material, none of the measured dimensions taken from the casts were significantly different from those taken from the original metal implant abutment. Thus, any change in measured dimensions occurring during impression making, was compensated for in some way by the casting process.
authors: L
authors: L
authors: Forrester-Baker
authors: K G
authors: KG
authors: Seymour
authors: D
authors: D
authors: Samarawickrama
authors: L
authors: L
authors: Zou
authors: G
authors: G
authors: Cherukara
authors: M
authors: M
authors: Patel
mesh_terms: D002133:Calcium Sulfate / Q000737:chemistry; D000044:Dental Abutments; D003734:Dental Casting Investment / Q000737:chemistry; D003735:Dental Casting Technique; D015921:Dental Implants; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007834:Lasers; D008422:Materials Testing; D011145:Polyvinyls / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry; D012828:Silicones / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties
chemical_list: D003734:Dental Casting Investment; D015921:Dental Implants; D003760:Dental Impression Materials; C102652:Extrude; D011145:Polyvinyls; D012826:Silicone Elastomers; D012828:Silicones; D012833:Siloxanes; C034183:vinyl polysiloxane; D002133:Calcium Sulfate