Bm. Culbertson et al., New matrix resins for glass polyalkenoates or glass-ionomers with pendant amino acid residues, J MACR S PU, A36(5-6), 1999, pp. 681-696
Citations number
17
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
The monomers N-acryloyl (AGA) and N-methacryloylglutamic acid (MGA) have be
en prepared and copolymerized with acrylic acid (AA) and itaconic acid (IA)
to make polyelectrolytes for evaluation in glass polyalkenoates or glass-i
onomers. It was shown that poly(AA-co-IA-co-AGA) and poly(AA-co-IA-co-MGA),
having a monomers ratio, respectively, of 7:3:3 could be formulated with g
lass powders used in Fuji II (GC America), alpha-Silver (DMG-Hamburg), alph
a-Fil (DMG-Hamburg) and Ketac-Molar (ESPE, Seefeld, Germany) to produce con
ventional glass-ionomers with improved compressive strength (CS), flexural
strength (FS) and fracture toughness (FT), compared to Fuji II, alpha-Silve
r, alpha-Fil and Ketac-Molar controls. Since MGA is much easier to produce
in high yields than AGA, it was important to show that MGA could be used as
well as AGA to produce new matrix resins for glass-ionomers. Furthermore,
we demonstrated that both the 7:3:3 AGA and MGA copolymers could be reacted
with 2-isocyanatoethyl methacrylate (IEM) to produce intermediates useful
for formulating visible light-curable (VLC) glass-ionomers with improved CS
, FS and FT, compared to two commercial VLC materials Fuji II(TM) LC and Vi
tremer(TM) Tricure. Here again, it was found that MGA could be used as well
as AGA to prepare improved materials. We also demonstrated that poly(AA-co
-MGA) could be used to formulate glass-ionomers with improved properties. F
urther, we demonstrated that small amounts of MGA could be used as a reacti
ve diluent in VLC formulations such as Fuji II(TM) LC, Vitremer(TM) Tricure
, and an experimental VLC formulation to improve their mechanical propertie
s, adhesion to tooth structure, and fluoride release.