OBJECTIVES. To evaluate the relationship between diamond grain size and cutting ability of abrasive burs for prosthetic dentistry. An optimal cutting capacity reduces working time, hand pressure and heating, possibly harmful for dental pulp; it also minimizes the risk of tooth microfractures. MATERIALS AND METHODS. The authors analyzed cutting ability on human dental samples of two diamond burs, the first with coarse-grained (120 μm) and the second with ultra coarse-grained (180 μm). A "mechanical arm" was used to reproduce standard working conditions. RESULTS. The authors found that medium coarse-grained burs cut better than ultra coarse-grained burs, probably because of a greater grain density. They also presume that cutting ability decreases when grains' dimension exceeds a critical point.
The relationship between diamond grain size and cutting ability of burs for prosthetic dentistry
Cianetti S.;Lombardo G.;Marinelli M.;Pagano S.;D'Errico P.
2009
Abstract
OBJECTIVES. To evaluate the relationship between diamond grain size and cutting ability of abrasive burs for prosthetic dentistry. An optimal cutting capacity reduces working time, hand pressure and heating, possibly harmful for dental pulp; it also minimizes the risk of tooth microfractures. MATERIALS AND METHODS. The authors analyzed cutting ability on human dental samples of two diamond burs, the first with coarse-grained (120 μm) and the second with ultra coarse-grained (180 μm). A "mechanical arm" was used to reproduce standard working conditions. RESULTS. The authors found that medium coarse-grained burs cut better than ultra coarse-grained burs, probably because of a greater grain density. They also presume that cutting ability decreases when grains' dimension exceeds a critical point.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
