3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements

Table 1

Strain measurements of four different composite cements with variations in size and thickness.

Material	Thickness	Diameter	Mean strain, section 0 von Misses, %	Standard deviation for section 0	Mean strain, section 1 von Misses, %	Standard deviation for section 1	Mean strain, section 2 von Misses, %	Standard deviation for section 2	Highest strain value section 0 von Misses, %
Maxcem Elite Kerr	1	3	2.1733	0.2528	1.7794	0.0167	1.8207	0.3287	6.65
		4	2.3324	0.1362	2.1653	0.5626	1.8980	0.6922	7.14
		5	1.9741	0.6387	1.8365	0.5083	1.6301	0.5977	5.65
	2	3	1.7405	0.3595	1.2874	0.4056	1.3886	0.4950	5.01
		4	2.3064	0.3152	1.4679	0.0712	1.4825	0.1738	6.33
		5	2.2836	0.3043	0.9359	0.3291	0.8568	0.0832	5.49
Multilink Automix Ivoclar Vivadent	1	3	2.2811	0.6781	1.6517	0.9899	2.1128	0.9083	6.10
		4	2.5541	0.3745	1.9505	0.8885	1.9443	0.5436	6.22
		5	3.3695	0.4611	2.8395	0.2977	3.0017	0.3475	9.74
	2	3	2.9937	0.2701	2.9829	1.8836	2.8327	1.3025	9.58
		4	2.7502	0.4123	1.8787	0.3942	1.6329	0.2572	5.94
		5	4.0263	1.4931	2.4652	0.5226	1.9701	0.7203	10.41
Relyx U200	1	3	2.3289	0.4769	1.6830	1.1743	1.1334	0.4411	4.41
		4	2.4721	1.2366	1.3668	1.0619	1.1931	0.9892	7.50
		5	2.2387	0.9129	0.7980	0.2231	0.8445	0.3176	10.42
	2	3	4.0793	0.4662	1.4816	0.5275	1.6820	0.6401	9.24
		4	4.6121	0.6277	1.6257	0.3809	1.6915	0.2917	8.33
		5	3.6284	0.3406	2.1172	0.2955	2.1496	0.3538	10.03
Set PP SDI	1	3	2.1314	0.7654	0.7795	0.0738	0.9144	0.1064	11.16
		4	1.6187	0.3665	1.0102	0.3971	0.8125	0.1432	9.29
		5	1.7964	0.0922	1.1519	0.6241	0.9696	0.4441	7.21
	2	3	2.2818	1.2817	1.8395	0.5557	2.1128	1.1096	6.71
		4	3.2813	0.7691	1.8935	0.5955	2.0672	0.9814	7.26
		5	2.0264	0.8074	0.9483	0.2069	0.9383	0.1031	5.61