[Table/Fig-6]:

Comparison of dimensional accuracy of group I casts (molar site) with master model using three types of impression trays.

Group I		Group II	Molar
			Bucco-lingual		Mesio-distal
			Mean ± SD	Difference	Mean ± SD	Difference
Group I Medium body	IA Metal Dual Arch	Mean ± SD % difference p value	6.847± 0.078 - -	0.040± 0.078 0.6% 0.14, NS	8.741± 0.06 - -	-0.002± 0.06 0.02% 0.92, NS
	IB Plastic Dual Arch	Mean ± SD % difference p value	6.881± 0.074 - -	0.076± 0.074 1.1% 0.01, S	8.708± 0.033 - -	0.031± 0.003 0.4% 0.02, S
	IC Custom Tray	Mean ± SD % difference p value	6.864± 0.033 - -	0.023± 0.033 0.4% 0.05,S	8.730± 0.012 - -	0.009± 0.012 0.1% 0.03,S
	ANOVA F P	IA/IB/IC	-	1.72 0.20,NS	-	1.80 0.19,S
	(Difference In Accuracy Amongst Various Tray Groups)	IA-IB IA-IC IB-IC	- - -	0.43,NS 0.84,NS 0.18,NS	- - -	0.17,S 0.80,NS <0.01,S

*Anova test