In some parts of the world little effort or even no effort is taken to sterilize dental equipment. Yes it's possible to get Hepatitis C from dental tools that haven't been sterilized. Take the time and ask the dentist how the tools are sterilized. Go to a dentist you know practices sterilizing all the dental tools
Best to you
No, they all do not practice safe dentistry. It is worse in countries outside of the USA.
Bottom line is it is possible to get infected by going to the dentist. It happens more often then people think, even in the USA !
Ask your dentist what procedure they follow for sterilization.
Best of luck