Effect of a self-etching primer and phosphoric acid etching on the bond strength of 4-META/MMA-TBB resin to human enamel

Abstract

The purpose of this study was to evaluate the shear bond strength and durability of 4-META/MMA-TBB resin to human enamel. A self-etching primer that contained 4-META (Teeth Primer, TP) and 35-45% or 60-65% concentrations of phosphoric acid (K-Etchant Gel, KE, and Super Bond C&B Red Activator, RA) were used as the surface treatment agents. A methyl methacrylate (MMA)-based self-polymerizing resin (Super-Bond C&B) was used as a luting agent. The shear bond strength was determined both pre and post thermocycling. The results were statistically analyzed with a non-parametric procedure. The post-thermocycling shear bond strength of the TP group was significantly higher than that of other groups, and that of the KE group was significantly higher compared with the RA group. These results demonstrated that 4-META was effective. Furthermore, when the degree of tooth demineralization was compared, surface treatment with less demineralization using TP was the most effective treatment.

Effect of sodium sulfite, carboxylic monomer, and phosphoric acid etching on bonding of tri-<i>n</i>-butylborane initiated resin to human enamel

“…However, the presence of an acidic monomer in the luting system is indispensable for bonding to enamel. It is reasonable to assume that sodium sulfite in Teeth Primer functioned as a reducing agent and positively contributed to interfacial polymerization of 4-META/MMA-TBB resin (4,14). This hypothesis suggests that there would be a significant difference between a control group and Na 2 SO 3 solution group.…”

“…Their results (4) revealed that bond strength to human enamel treated with Teeth Primer was more durable than that etched with 40% or 65% phosphoric acid. Interestingly, the post-thermocycling reduction in bond strength was lower in the Teeth Primer group than in the acid-etched groups.…”

“…Because Teeth Primer was developed as a self-etching primer, Nogawa et al (4) compared the effectiveness of the primer and phosphoric acid as different types of etchant to be used together with 4-META/MMA-TBB resin. Their results (4) revealed that bond strength to human enamel treated with Teeth Primer was more durable than that etched with 40% or 65% phosphoric acid.…”

“…TBB initiated methyl methacrylate (MMA) resins have been used for bonding enamel (1)(2)(3)(4), dentin (3,5), casting alloy (6)(7)(8), and ceramics (9)(10)(11) in combination with various etchants and primers.…”

Eleven-year clinical performance of a mandibular natural tooth pontic bonded with modified tri-<i>n</i>-butylborane initiated adhesive resin

“…These problems have been overcome by application of toothcolored material (6) as well as phosphoric acid etchant with an adequate concentration (4,9). This clinical report describes the long-term clinical performance of a natural tooth pontic bonded to adjacent teeth with modified TBB resin.…”