How much are you using the ultrasonic or Piezo? In my experience the more you ultilize ultra etc… You will improve your hand instrument angulations. Also, you can use extra-oral fulcrum.
I watched youtube videos a lot when I was in school. Just search various instruments or techniques into youtube. I also used it for anesthetic techniques (if you are in a state where you can give anesthetic).
wsu dental hygiene has some great videos on youtube. Also most text books come with website log-ins that have good videos too.
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