Effect of reactive adhesives on the tensile bond strength of polyvinyl siloxane impression materials to methyl methacrylate tray material.
The effect of new adhesives on the bond strength of elastomeric impression materials to acrylic trays was evaluated. Two polyvinyl siloxane impression materials (Fusion and Imprinsis) with reactive adhesives and one (Examix) with a conventional adhesive were tested. Flat, double-sided plates of auto-polymerizing methyl methacrylate (10 x 10 x 2.5 mm) were prepared with one of the adhesives. Five specimens were prepared by injecting each impression material into a 2-mm gap between the two plates. Tensile tests were conducted until separation failure occurred. The mean bond strengths of Fusion (1.0 MPa) and Imprinsis (0.8 MPa) were significantly greater than that of Examix (0.2 MPa). On the contrary, one of five Fusion showed adhesive failure mode while all the Imprinsis exhibited mixed failure. The conflicting results were presumably attributed to the mean tear strength of Fusion (0.8 N/mm) being higher than that of Imprinsis (0.5 N/mm).
Ona
Masahiro
M
Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Takahashi
Hidekazu
H
Sato
Masayuki
M
Igarashi
Yoshimasa
Y
Wakabayashi
Noriyuki
N
D000269:Adhesives / Q000737:chemistry*; D001840:Dental Bonding; D003760:Dental Impression Materials; D003761:Dental Impression Technique / Q000295:instrumentation*; D003799:Dental Stress Analysis; D008422:Materials Testing; D020366:Methylmethacrylate; D011145:Polyvinyls; D012833:Siloxanes; D013718:Tensile Strength
D000269:Adhesives; D003760:Dental Impression Materials; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; D020366:Methylmethacrylate