What is the best type of bur to use for occlusal rest preparation?

The inverted cone bur is the most suitable choice for occlusal rest preparation due to its specific design features that enable effective excavation and shaping of tooth structure. This bur has a tapered design that allows it to create a well-defined preparation, which is crucial for ensuring an adequate occlusal rest seat. The inverted cone shape facilitates access to areas that may be difficult to reach with other types of burs, allowing for precision in the preparation of the occlusal surface.

Moreover, the inverted cone bur helps achieve appropriate depth and contours, which are important for the retention and stability of the restoration that will be placed in the defined area. This bur is particularly effective in preparing a flat surface that can serve as a stable and supportive foundation for various dental applications, including the placement of partial dentures.

In contrast, while a steel round bur could be useful for initial access or creating rounded cavities, it lacks the flat cutting capability necessary for creating the desired occlusal rest shape. A flat fissure bur may also create flat surfaces, but it’s less effective in creating the specific contours needed for occlusal rests. A diamond-coated bur, while great for finishing and smoothing, may remove too much material too quickly and does not provide the same precision in creating the