Percussive instruments
-Crown and bridge remover CORONA flex
I. Nitch
-it's tip look like the curette and has hock
-4 or 5 tips according to tooth position and accessibility
-apply hock subgingivally on the margins of the crown one buccally and then lingually
- Do pressure occlusally to break the bond around the margins and remove the crown easily.
II. Crown Flex
-Has loop applied under the pontic area then fixed with arm
-It’s force automatically applied with gun attached in contra and stock or hock to separate the crown from the bridge or restoration.