Effect of disinfection of custom tray materials on adhesive properties of several impression material systems.
The effects of impression tray disinfection procedures on the bond strength of impression-material adhesives to two types of resin trays were evaluated with a tensile test. Autopolymerizing acrylic resin and a visible light-curing resin were formed into one-half inch cubes. A screw eye was attached to each cube before polymerization. Perforated trays were fabricated with stops to maintain an even one-eighth inch of impression material over the resin block. Hooks on the opposite side permitted attachment of the metal plate to a mechanical testing machine. Before adhesive was applied, one third of the resin specimens were immersed in a 1:213 iodophor solution; one third in a 10% sodium hypochlorite solution, and one third were kept in the "as fabricated" condition. Polysulfide, polyether, and polyvinyl siloxane impression material-adhesive systems were evaluated. The resin-impression material-metal plate couples were attached to a mechanical testing machine and tensile forces were applied at a separation rate of 5 inches per minute. Mean values for adhesive strength ranged from 3.49 kg/cm2 for the autopolymerizing acrylic resin/iodophor/polyether combination to 10.55 kg/cm2 for the autopolymerizing acrylic resin/untreated/polyvinyl siloxane combination. Differences were detected among materials and disinfecting procedure. Clinically, disinfection of resin trays may adversely affect retention of the impression material to the tray.
Advanced Education Program in Prosthodontics, Walter Reed Army Medical Center, Washington, D.C.
G A
GA
Thompson
S G
SG
Vermilyea
J R
JR
Agar
D000180:Acrylic Resins / Q000737:chemistry; D000268:Adhesiveness; D000269:Adhesives / Q000737:chemistry*; D002858:Chromium Alloys / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique / Q000295:instrumentation*; D003764:Dental Materials / Q000737:chemistry*; D004202:Disinfectants / Q000737:chemistry*; D004203:Disinfection / Q000379:methods; D007466:Iodophors / Q000737:chemistry; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D012973:Sodium Hypochlorite / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength
D000180:Acrylic Resins; D000269:Adhesives; D002858:Chromium Alloys; D003722:Dental Alloys; D003760:Dental Impression Materials; D003764:Dental Materials; D004202:Disinfectants; C022821:Impregum; D007466:Iodophors; D011108:Polymers; D011145:Polyvinyls; D012117:Resins, Synthetic; D012833:Siloxanes; D013440:Sulfides; C034183:vinyl polysiloxane; C060386:Triad resin; C039459:ticonium; C032915:polysulfide; D012973:Sodium Hypochlorite