Table2. Measures of central dispersion for cell viability at 24 hours after the last laser irradiation cycle in the six groups .

Group	Intervention	Sample size*	Mean	Std. deviation	Maximum	Minimum
1	OM(Control)	4	100.17	1.36	101.59	98.33
2	VD	4	106.05	0.78	106.98	105.12
3	660 nm, 10 s	5	105.95	2.09	107.91	103.25
4	VD + 660 nm, 10 s	4	109.48	4.70	116.04	104.88
5	660 nm, 17 s	5	120.79	6.26	127.67	114.88
6	VD + 660 nm, 17 s	5	131.02	3.06	135.11	127.91

^* One unit of cells in each of the groups 1, 2, and 4 was lost during the experiment, and their data could not be used in statistical analysis. OM: Osteogenic medium; VD: Vitamin D