true or false : ( #dental_pharmacology )
1- Tannic acid is strong anticaries agent
2- calcium hydroxyappatite is more stable than calcium furoappatite
3- the optimal level of fluoride in drinking water is 100 ppm
4- during acute fluoride toxicity , no need for gastric lavage
5- drinking water regulary causeing dental flurosis
6- xylitol is sugar alcohol which is highly fermented by cariogenic bacteria
7- xylitol gums causing dry mouth
8- chlorhexidine kills both S.mutans & lactobacilli bacteria
9- chlorhexidine only used as mouth wash
10- the drugs that precipitate proteins over superficial layers to stop bleeding are called anticaries
11- alcohol is commonest used as astringent
12- potassium nitrate is commonest astringent agent
13- the best desenistizing agent that stain teeth
14- sweetners are active ingredients of dentifrices
15- desensitizing agents are the agents that hardening pulp / root canal
16- iodoform is general anasthetic
17- bleaching are agents that remove superficial stains
18- pillow in emergency kit is putted under neck of pregnant woman
19- ammonia crashed glass perles are used for treat severe hypotension during emergency
20- diazepam IV for treatment of cardiac arrest during emergdncy
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