Which bur type helps create angles in cavity walls?

The tapered fissure bur-crosscut is specifically designed to create precise angles in cavity walls due to its unique shape and cutting edge configuration. Its tapered design allows the bur to easily access and refine the walls of a cavity preparation while maintaining the desired angulation. The crosscut feature enhances its cutting efficiency, enabling it to shape the cavity effectively and create a more defined angle between the walls.

This is especially important in dental procedures, as having correctly angulated cavity walls ensures better retention of restorative materials and contributes to the overall effectiveness of the repair. The other bur types serve different functions; for example, the pear-shaped bur is primarily used for creating rounded preparations, the inverted cone bur is useful for establishing undercuts, and the round bur is typically used for initial penetration and removing caries, rather than shaping angles in cavity walls.