Fracture Forces of Dentin after Surface Treatment with High Speed Drill Compared to Er:YAG and Er,Cr:YSGG Laser Irradiation

Table 4

Exact dimensions, breaking force, and bending strength of the specimens treated by fine diamond bur in a high speed hand piece (group 1). The mean value of the bending strength is 104.47 MPa with a standard deviation of 26.31 MPa.

Number	Thickness/mm	Width/mm	Breaking force/N	Bending strength/MPa
1	1.15	2.12	39.90	115.27
2	1.75	1.05	34.20	86.15
3	1.12	1.89	24.40	83.36
4	1.55	1.81	44.10	82.15
5	1.56	1.67	49.10	97.86
6	1.35	1.79	48.20	119.68
7	1.40	1.79	33.60	77.57
8	1.65	1.87	55.90	88.94
9	2.00	1.09	78.70	146.21
10	1.57	1.86	83.50	147.52