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

Table 2

Exact dimensions, breaking force, and bending strength of the Er,Cr:YSGG irradiated specimens (group 2). The mean value of the bending strength is 96.08 MPa with a standard deviation of 28.08 MPa.

Number	Thickness/mm	Width/mm	Breaking force/N	Bending strength/MPa
1	1.49	1.90	35.70	68.55
2	1.65	1.80	59.80	98.84
3	1.54	1.87	67.70	123.65
4	1.83	1.46	89.10	147.61
5	1.16	1.88	21.20	67.88
6	1.64	1.95	72.10	111.35
7	1.27	1.75	37.30	107.04
8	1.38	1.89	33.10	74.49
9	1.50	1.83	61.20	120.39
10	1.20	1.80	18.00	56.25
11	1.44	1.74	27.40	61.51
12	0.93	1.70	20.30	111.83
13	1.07	1.86	27.90	106.12
14	1.14	1.87	21.20	70.66
15	1.68	1.88	79.30	121.05
16	1.55	1.73	76.50	149.09
17	1.14	1.90	24.90	81.68
18	1.13	2.37	25.50	68.25
19	1.98	1.00	53.70	110.95
20	1.65	1.80	48.20	79.67