Recommended Drilling Parameters of Tungsten Carbide Round Drills for the Most Optimal Bone Removals in Oral Surgery

Figure 2

(a) Two of the tested tungsten carbide round drills in this study. Left: new drills and right: worn drills after 50 usage and sterilizations. Visualizing the signs of wear of the cutting edges is difficult without magnifications. (b) Left: new drill and right: worn drill. With the help of an operation microscope (~30x magnification), it is apparent that on the worn drill the cutting edges are visibly blunter. Cutting edges of the worn drill appear as a surface, rather than a narrow line (see colored squares and ellipses), while at the tip, as seen on the cross-cuts, it is more rounded (green circles).

(a)

(b)