Digital intraoral scanner devices- validation study based on common evaluation criteria

Traditional impression taking is dominant in Hungary; however, the evolution of intraoral scanners (IOS) is rapid. Validation study was needed to evaluate IOSs. Validation study aimed to compare different IOSs based on objective parameters. Twelve different scanners were examined from eight manufacturers (in order of testing period): 3Shape Trios3Pod®, Planmeca Emerald®, Straumann DWIO®, GCAadva®, iTero Element2®, CEREC Primescan®, Medit i500DIOS4®, 3Shape Trios4Move®, Carestream3600®, 3Shape Trios4Pod®, Carestream3700®, Planmeca EmeraldS®. Each scanner was tested during a 2-week period. Three dental students with no previous experience with IOSs and the same education before the examination took part in testing procedure. The evaluation of the scanners was performed in four different ways: (a)summary chart, (b)comparative assessment (weight and circumference of the scanner) (c)in vitro measurements (scanning time and continuity of scanning) and (d)accuracy. A scoring system was created for the objective marking of the scanners. The permission for this study was given by the University Ethics Committee of Semmelweis University (SE RKEB number:108/2019). The differences between IOSs are manifested in points (summary chart-max.10 points+weight of scanner-max.2,5 points+circumference of scanner-max.2,5 points+in vitro scanning time-max.2,5 points+stops of data capturing-max.2,5 points+accuracy-max.10 points=summary-max.30 points): GCAadva®:0+1,95+0+0,71+1,07+2,6=6,33;Straumann DWIO®:0+2,24+2,26+0,13+1,07+2,6=8,30;PlanmecaEmerald®:5,19+1,63+0,72+0+0+1,6=8,74;iTeroElement2®:0,74+0,39+1,1+0,84+2,5+6=11,57;Carestream3600®:1,11+1,24+1,47+1,74+2,5+3,8=11,86;Me-diti500DIOS4®:0+1,47+1,57+1,22+2,14+6,8=13,20;3ShapeTrios3Pod®:4,07+1,19+1,5+0,84+2,5+4,6=14,70;CERECPrimescan®:4,07+0+1,38+1,19+2,14+7,4=16,18;PlanmecaEmeraldS®:6,30+1,52+1,13+1,96+1,43+4,4=16,74;Carestream3700®:6,3+1,25+1,61+2,42+2,5+3,6=17,68;3ShapeTrios4Move®:7,78+1+1,38+2,12+2,5+6,4=21,18;3Shape Trios4Pod®:10+0,99+1,44+2,5+2,5+7=24,43. The scoring system reflects the differences between scanners and determines their main indication area to help Hungarian clinicians to select the appropriate IOS. The next generations of the scanners have better properties than the previous versions.