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Inverted Cone Burs are suitable to undercut access opening for root canals or for restorations. They may also be used for flattening pulpal or gingival walls. Inverted cone burs have a long or short head length, which may be single or crosscut. Some inverted cone burs feature a collar, while others are called double inverted cone burs and symmetrical inverted cone burs. An inverted cone bur is used as an excavating bur and is also well suited for making undercuts in dental industry