Table 2. Mean general precision 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 Precision ± SD (μm)	Mean Precision ± SD (μm)
Trios®	51.0 ± 18.5 † ‡	67.0 ± 32.2 † ‡	0.4
CS 3500®	40.8 ± 6.4 § ¶	55.2 ± 10.4 § ¶	0.4
Zfx Intrascan®	126.2 ± 21.2 † § °	112.4 ± 22.6 † § °	0.5
Planscan®	219.8 ± 59.1 ‡ ¶ °	204.2 ± 22.7 ‡ ¶ °	0.4

The same symbol after SD indicates differences in trueness between scanner pairs (Tukey-adjustment for multiple comparison). Minimum significant difference across scanners: 59.5 μm and 42.2 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 precision according to model type.