Hello, I recently had a root canal done. During the procedure, my dentist would repeatedly remove the drill from my mouth and place the drill bit into a blue box that contained several holes. He would read off a measurement to his assistant and then return the drill/drill bit into my tooth and drill more. The blue box looked old/worn. I now have several sores in my mouth and am paranoid that it is the result of his putting the drill bit ito the box where all other root canal measurements are made and then back into my mouth. I am scared about the procedure not being sterile and getting disease from this. Is this something that should be reported? Should I switch dentists?