In conclusion, this study showed that 5-CQA, trigonelline, and
caffeic acid from coffee exert inhibitory activity against the growth
of S. mutans; that such activity is enhanced by the presence of caffeine
and/or other compounds extracted by decaffeination; that C.
canephora extracts seems to exert better performance in relation to
inhibition of biofilm formation than those of C. arabica and that
roasting degree is inversely associated with antibacterial activity
against S. mutans.