Table 6.

Statistical analysis of the dimensional variation in stone models produced after different disinfection systems for Ad-Sil Impression material.

	Groups	Standard mean (mm)	Mean (mm)	% Deviation	SD	t value	df	Sig. (2-tailed)	Mean difference
AB	Group G	22.04	22.1840	0.6534	0.07771	26.588	9	0.000	0.14400
	Group S		22.1410	0.4583	0.06217	23.308	9	0.000	0.10100
	Group U		22.1400	0.4537	0.03025	47.434	9	0.000	0.10000
	Group C		22.1400	0.4537	0.05239	27.386	9	0.000	0.10000
CD	Group G	23.038	23.1500	0.4862	0.04575	33.600	9	0.000	0.11200
	Group S		23.1500	0.4862	0.03069	47.518	8	0.000	0.11200
	Group U		23.1490	0.4818	0.03203	47.571	9	0.000	0.11100
	Group C		23.1510	0.4905	0.05197	29.847	9	0.000	0.11300
AD	Group G	49.042	49.3210	0.5689	0.01505	119.571	9	0.000	0.27900
	Group S		49.3290	0.5852	0.01785	103.652	9	0.000	0.28700
	Group U		49.3300	0.5873	0.01359	136.610	9	0.000	0.28800
	Group C		49.3200	0.5669	0.02355	76.133	9	0.000	0.27800
BC	Group G	30.30	30.4700	0.5611	0.02695	65.841	9	0.000	0.17000
	Group S		30.4500	0.4950	0.02695	58.095	9	0.000	0.15000
	Group U		30.4110	0.3663	0.02435	47.571	9	0.000	0.11100
	Group C		30.3990	0.3267	0.03282	31.482	9	0.000	0.09900
EF	Group G	5.024	5.0020	−0.4379	0.08392	−16.500	9	0.000	−0.02200
	Group S		5.0018	−0.4419	0.07553	−18.500	9	0.000	−0.02220
	Group U		5.0100	−0.2787	0.00000	A		NS
	Group C		5.0100	−0.2787	0.00000	A		NS
GH	Group G	3.022	3.0100	−0.3971	0.01560	−80.498	9	0.000	−0.01200
	Group S		3.0110	−0.3640	0.09359	−12.298	9	0.000	−0.01100
	Group U		3.0100	−0.3971	0.00000	A		NS
	Group C		3.0100	−0.3971	0.01560	−80.498	9	0.000	−0.01200

A: t cannot be computed because the standard deviation is 0.

NS: Not significant.