Table 3.

Open and closed tray technique accuracy in the maxilla and mandible, using the Mann-Whitney U test

Techniques	Variables	Number of impressions	Median	Mean	SD	P value
Open tray	Maxilla	18	0.040	0.0833	0.076	0.107
	Mandible	22	0.030	0.0464	0.054
Closed tray	Maxilla	18	0.040	0.0756	0.076	0.419
	Mandible	22	0.040	0.0945	0.0104

Significance level p ≤ 0.05