Which of the following is not a type of grit used in dental procedures?

Ultra-fine is not considered a standard type of grit used in dental procedures. In dental terminology, grits refer to the coarseness of abrasives used in various procedures, such as polishing or preparing tooth surfaces. The traditional categories include extra coarse, medium, and fine, which are utilized for different applications based on the level of abrasiveness required.

Extra coarse grit is typically used for heavy material removal, such as in the initial stages of grinding or contouring. Medium grit serves as a transitional abrasive that can effectively shape materials while offering a smoother finish than the extra coarse. Fine grit is utilized for finishing procedures, as it provides a smoother surface ideal for polishing.

While 'ultra-fine' may be referenced in different contexts, it does not align with the commonly accepted categorizations within dental practices. Therefore, distinguishing between the standard grit types is essential for understanding their specific applications within dental procedures.