Table 1. Mean general trueness and standard deviation (SD), in μm, for partially and totally edentulous maxilla, and p values testing the scanner by model interaction.

N = 5 scans for each scanner and model type.

Scanner	Partially edentulous maxilla	Totally edentulous maxilla	p-value1
	Mean Trueness ± SD (μm)	Mean Trueness ± SD (μm)
Trios®	71.2 ± 19.5 †	71.6 ± 26.7 †	0.9
CS 3500®	47.8 ± 7.3 ‡ §	63.2 ± 7.5 ‡ §	0.4
Zfx Intrascan®	117.0 ± 28.6 ‡ ¶	103.0 ± 26.9 ‡ ¶	0.5
Planscan®	233.4 ± 62.6 † § ¶	253.4 ± 13.6 † § ¶	0.3

The same symbol after SD indicates differences in trueness between scanner pairs (Tukey-adjustment for multiple comparison). Minimum significant difference across scanners: 65.1 μm and 37.1 μm for partially and totally edentulous maxilla models, respectively.

1 p-value testing of the interaction between scanner and model type (partially vs totally edentulous maxilla): a p-value > 0.05 indicates no difference in scanner trueness according to model type.