ANTIBACTERIAL RESINS INCORPORATING MDPB
Antibacterial monomer MDPB
In order to achieve resin-based restorative materials
with antibacterial effects, we aimed to develop an
antibacterial monomer that is a polymeirzable
bactericide (Fig. 1). Several antimicrobials were
tested for their possibility to be combined with a
methacryloyl group, and MDPB was successfully
synthesized from quaternary ammonium
dodecylpyridinium (Fig. 2)1,2)
.
When unpolymerized, antibacterial monomer
acts as a free bactericide similar to conventional
antimicrobials. MDPB, an analogue of cetylpyridin-
ium chloride, which is a strong bactericide frequently
used for oral rinses or dentifrices, was confirmed to
have strong killing activity against various oral
bacteria as proven by its minimum bactericidal
concentration (MBC) values (Table 1)3,4)
. In addition
to facultative and obligate anaerobe detected in
coronal lesions, MDPB is effective against bacterial
species predominantly isolated from root caries, such
as actinomyces and Candida albicans5)
. It was also
found that MDPB can kill bacteria rapidly at