What is the purpose of a round bur in dental procedures?

A round bur is primarily used in dental procedures to prepare cavities for restorative work, especially when working with resin fillings. Its design allows for effective cutting and shaping of tooth structure, making it ideal for removing decay and forming the cavity preparation. This bur facilitates the creation of an ideal shape that not only supports the bonding of the resin but also ensures a smooth and aesthetically pleasing finish once the restoration is completed.

While the other functions mentioned in the choices may relate to different instruments or types of burs, the round bur's specific application focuses on cutting and shaping. It is not utilized for removing bone, packing amalgam, or adjusting resin materials—these tasks typically require different tools and instruments designed for those specific purposes. Understanding the role of the round bur in finishing and preparing resin fillings is essential for effective dental restorative procedures.