Table 1.

Volume changes (mm³) observed over 3 years when positive data were set to zero, which is a commonly used method by many commercial companies.

Scan type	Geomagic	WearCompare	P value
Laser profilometer, median (IQR)	–0.37 (–3.75-0.00)	–1.21 (–3.48-0.00)	.30
Intraoral scanner, median (IQR)	0.00 (–2.17-0.00)	–0.39 (–3.95-0.00)	.09