mother goose, root canel treatment is fine during pregnancy as long as they dont take any x rays (it cant be completed with out taking any) what they will probaly do is start the treatment to get rid to the infection (this can be done without x rays), and when you've had your baby you will go bak to have the treatment completed, usually another 1-2 visits.
ODETTE the enzyme your talking about is related to periodontal disease, the bacteria in servere periodontal disease has been linked to premature births especially in the US amoungst the poorer population, our hygeine is much much better over here!! so the problem here would be minimal
i hope this has helps guys!!!