Isocyanato- and Methacryloxysilanes Promote Bis-GMA Adhesion to Titanium

Lassila

2010

In this study we have assessed the effect of longterm water storage at 37 o C on silane-aided adhesion promotion. Five experimental silane blends were evaluated as adhesion-promoters. First, five functional organosilane monomers (silicon esters), 3-acryloxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, tetrakis-(2-methacryloxyethoxy)silane and bis-[3-(triethoxysilyl)propyl]tetrasulfide, were diluted to 1% (v/v) in 95% ethanol and blended with a non-functional crosslinking silane, bis-1,2-(triethoxysilyl)ethane (1%). A commercially available pre-activated silane product was used as the control. After activation by hydrolysis, each primer blend was applied to silica-coated Ti coupons. Stubs of experimental bisphenol-A-diglycidyldimethacrylate (bis-GMA)-based resin were bonded by photo-polymerization onto the pretreated Ti coupons. Half of the specimens were stored in deionized water for 6 months and half for 12 months. The primer containing 3-acryloxypropyltrimethoxysilane and bis-1,2-(triethoxysilyl) ethane produced significantly higher shear bond strengths than the control silane and other experimental silane primers after both periods of storage.

Section: Resultsmentioning

confidence: 99%

Experimental Novel Silane System in Adhesion Promotion between Dental Resin and Pretreated Titanium. Part II: Effect of Long-Term Water Storage

Lassila

2010

“…Matinlinna et al [13] demonstrated that isocyanatosilane achieved a significantly Fig. 1 The molecular structures of the two isocyanatosilanes, cross-linking silane and reactive monomer in resin-composite.…”

Section: Introductionmentioning

confidence: 99%

“…The amount of water adsorbed varies with the relative humidity of the environment. The aim of this study, as an extension of some previous work [13], was to investigate the effects of varying hydrolyzable groups of isocyanatosilanes and silane concentrations, as well as the effect of adding a cross-linking silane, on the shear bond strength of a modern resin-composite attached to silicatized zirconia. The specimens were stored and tested in dry conditions under ambient humidity at room temperature to investigate the initial bond strength.…”

Section: Introductionmentioning

confidence: 99%

Resin Bonding to Silicatized Zirconia with Two Isocyanatosilanes and a Cross-linking Silane. Part I: Experimental

Lung

2010

In this study we have investigated the effects of the chain length of hydrolyzable groups in two isocyanato silane coupling agents, 3-isocyanatopropyltrimethoxysilane and 3-isocyanatopropyltriethoxysilane, on the shear bond strength of resin attached to silicatized zirconia. In addition, the effects of varying the silane concentration (at 0.1 vol% and 1.0 vol%) with or without the addition of a cross-linking silane (0.05 vol % or 0.5 vol% bis-1,2-(triethoxysilyl)ethane) were assessed. It was concluded that the use of the experimental primer of 3-isocyanatopropyltrimethoxysilane at either 0.1 vol% or 1 vol% with cross-linking silane resulted in significantly higher shear bond strengths than the use of primer without the cross-linking silane.

“…3-Methacryloxypropyltrimethoxysilane, also known as 3-methacryloyloxypropyltrimethoxysilane, is indicated as a pre-hydrolyzed ready-to-use primer (adhesion promoter) in dental technology and prosthodontics for silicacoated materials, see Fig. 1 [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…However, the hydrolytic stability of silane-aided bonding, and hence the service time of the restoration in the hostile oral environment (i.e. with humidity, sudden pH and temperature changes, bruxism and biting forces), is a topic of concern [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Promotion of Adhesion Between Resin and Silica-coated Titanium by Silane Monomers and Formic Acid Catalyst

Lassila

Dahl

2010

Three bifunctional silane coupling agent monomers and their blends with a cross-linking silane were investigated as six experimental adhesion-promoters in vitro. Three organosilane monomers, 3-methacryloxypropyltrimethoxysilane, styrylethyltrimethoxysilane, and 3-(N-allylamino)propyltrimethoxysilane, were prepared as 1% (v/v) primers and also blended with a cross-linking silane, 1,2-bis-(triethoxysilyl)ethane at 0.5% (v/v), in a 95:5 solution of ethanol in deionized water. The silanes were allowed to hydrolyze using formic acid as catalyst and were applied to a substrate of silica-coated Ti. The control was a prehydrolyzed silane coupling agent that is commonly used in dentistry. An experimental unfilled bis-phenol-A-diglycidyldimethacrylate/methylmethacrylate resin was bonded by photo-polymerization as stubs to the prepared Ti. Half of the specimens were artificially aged by wet thermocycling and half were stored in dry conditions in a desiccator. Storage conditions and the type of primer silane or blend significantly affected shear bond strength values. 3-Methacryloxypropyltrimethoxysilane, alone or blended, produced significantly higher shear bond strength values than the control, both after dry storage and after thermo-cycling.