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

Table 1

Exact dimensions, breaking force, and bending strength of the untreated control (group 1). The mean value of the bending strength is 82.02 MPa with a standard deviation of 27.25 MPa.

Number	Thickness/mm	Width/mm	Breaking force/N	Bending strength/MPa
1	1.20	1.90	37.90	112.20
2	1.96	1.60	84.00	110.70
3	1.36	1.90	32.00	73.76
4	1.44	1.88	6.58	13.67
5	1.77	1.66	55.30	86.13
6	1.58	1.86	45.20	78.85
7	1.37	1.85	37.20	86.78
8	1.40	1.86	38.00	84.43
9	1.30	1.75	34.40	94.21
10	1.88	1.77	61.40	79.50