Novel, multi-purpose, PMMA-type adhesive resin with newly synthesized microcapsule of radical polymerization initiators.

Abstract:

:The behavior of microencapsulated polymerization initiators in dental adhesives is unknown. This study investigated the effects of new microencapsulated initiators in novel, multi-purpose, PMMA-type adhesive resin on the bonding performance and polymerization reactivity. Microencapsulated BPO and 1,3,5-trimethylbarbituric acid (TMBA) with PEMA as a shell polymer were quantitatively synthesized at 97-98% yield with 30-54 microm diameter. Adhesive-MC (comprising the synthesized microcapsules) and Adhesive-BR (comprising bare BPO and bare TMBA) were prepared and stored at 5 degrees C, 23 degrees C, and 40 degrees C for two months. MMA monomer was used as a solvent for the microcapsules. At the starting period, there were no significant differences between Adhesive-MC and Adhesive-BR in shear bond strength to enamel or dentin treated with or without surface treatment agent (p<0.05); moreover, their curing times (tc=304 seconds) were almost the same. After two months' storage at 40 degrees C, Adhesive-BR degraded in bond strength and showed markedly delayed polymerization reactivity as storage period progressed. In direct contrast, it was found that Adhesive-MC still retained its capabilities for adhesion to gold alloy and initiation of radical polymerization (p<0.05).

journal_name

Dent Mater J

journal_title

Dental materials journal

authors

Fuchigami K,Ikemura K,Ichizawa K

doi

10.4012/dmj.27.35

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

35-48

issue

1

eissn

0287-4547

issn

1881-1361

journal_volume

27

pub_type

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