Evaluation of two dual-functional primers and a tribochemical surface modification system applied to the bonding of an indirect composite resin to metals

Abstract

We evaluated the effects of two dual-functional primers and a tribochemical surface modification system on the bond strength between an indirect composite resin and gold alloy or titanium. Disk specimens (diameter, 10 mm; thickness, 2.5 mm) were cast from type 4 gold alloy and commercially pure titanium. The specimens were wetground to a final surface finish using 600-grit silicone carbide paper. The specimens were then air-dried and treated using the following four bonding systems: (1) air-abrasion with 50-70 mum alumina, (2) system 1 + alloy primer, (3) system 1 + metal link primer, and (4) tribochemical silica/silane coating (Rocatec). A light-polymerizing indirect composite resin (Ceramage) was applied to each metal specimen and polymerized according to the manufacturer's specifications. Shear bond strengths (MPa) were determined both before and after thermocycling (4 degrees C and 60 degrees C for 1 min each for 20 000 cycles). The values were compared using analysis of variance, post hoc Scheffe tests, and Mann-Whitney U tests (alpha = 0.05). The strengths decreased after thermocycling for all combinations. For both gold alloy and titanium, the bond strength with air-abrasion only was statistically lower than that with the other three modification methods after thermocycling. Titanium exhibited a significantly higher value (13.4 MPa) than gold alloy (10.5 MPa) with the air. abrasion and alloy primer system. Treatment with the tribochemical system or air abrasion followed by treatment with dual-functional priming agents was found to be effective for enhancement of the bonding between the indirect composite and gold alloy or titanium.

Bonding durability between acrylic resin adhesives and titanium with surface preparations

“…The metoxy group of γ-MTPS reacts with alkoxy groups on surface of silica, and results in siloxane bonding (covalent bonding) 25) . Although ROC was reported to be efficient for bonding indirect composite resin materials and noble and/or base metals 26,27) , in this study, the bond strength obtained by the ROC treatment was lower as well as that obtained by SAN. Previous investigations indicated that ROC was not so effective in enhancing the bond strength between cobalt-chromium alloy or titanium and poly MMA denture base resin 16,17) and it was speculated that the ROC system may be suitable for unyielding specimens, such as ceramic or indirect composite materials, but not for poly(MMA) linear polymers, which exhibit a greater degree of polymerization shrinkage and thermal expansion.…”

Bonding and wear characteristics of a tri-n-butylborane initiated adhesive resin filled with pre-polymerized composite particles

“…Among these, acidic monomers are used for bonding tooth structure (1,2), whereas thiol or thione monomers are used for priming noble metal alloys (3)(4)(5). An adhesive resin initiated with tri-n-butylborane (TBB) derivative, in combination with thiol or thione primer, has been used for bonding between tooth structure and noble metal alloy (6,7), between indirect composite material and noble metal alloy (4,(8)(9)(10), and for metal-to-metal bonding (11)(12)(13)(14). In addition, TBB resin has been used in direct restoration (15,16).…”

Fracture resistance of compromised endodontically treated teeth restored with bonded post and cores: An in vitro study

“…25, 26, 27, 28, 29, 30, 31, 32, 33 and 34 They are also used to cement metal posts and can be used with metal primers that enhance the bond to composite resins. 35 Resin cements find application in the monoblock theory, in which dentin, post, and core function as a cohesive unit. 14 and 36 The oral cavity is not a static environment.…”

“…This may be attributed to better adaptation of the cast posts or better bond to resin cements, especially when they are treated with primers. 35 Also, the double tapered design and absence of serrations in the fiber posts may have reduced their mechanical retention. Previous research suggests that altering the surface of fiber posts can improve the bond to resin.…”