For which procedure is a pear-shaped bur primarily used?

A pear-shaped bur is primarily designed for specific tasks in restorative dentistry, and its shape is tailored for efficient cutting and shaping of tooth structures. The pear shape allows for a broader cutting surface at the base, tapering to a narrower point, which is particularly advantageous when opening cavities for restoration. This design enables dentists to effectively access areas of decay while providing the ability to create a wider opening that accommodates the restoration material later.

In the context of the other choices, the pear-shaped bur is not intended for closing gaps between teeth. Closing tooth gaps typically employs other dental tools and materials aimed at that specific purpose rather than a bur designed for cutting and shaping. While forming angles in cavity walls is a task that some burs can do, pear-shaped burs are not primarily used for this purpose; other shapes of burs are better suited for creating precise angles in cavities due to their specific designs. Removing hard tissue around cavities is indeed a function of some dental burs, but again, the pear-shaped bur's primary purpose lies more in the opening of teeth for restorative procedures rather than in the meticulous process of removing surrounding tissue.

Thus, the use of a pear-shaped bur best aligns with the task of opening teeth for restoration, making it the correct choice in the context of this