Table 2: Sa values and standard deviation in the ROIs as well as dental technicians’ evaluation of post-processing time and quality of the bars based on the grading system used in German schools

Bar Labial Region
Sa [µm]
Transmucosal Region Sa [µm] Implant-bar Interface Region Sa [µm] Mean Value of All Regions Sa [µm] SD Sa [µm] Mean Reworking Time [h] Average Quality Grades [1 to 6]
ZST 0.17 0.23 0.36 0.25 ± 0.08 0,75 1,3
ZCC 0.28 0.39 0.33 0.34 ± 0.05 0,94 1,4
ZDC 0.38 0.33 0.37 0.36 ± 0.02 0,75 1,3
ZBC 0.29 0.47 0.31 0.36 ± 0.08 1,50 3,0
LDT 0.43 0.41 0.37 0.40 ± 0.02 3,94 4,5
LDC 0.43 0.52 0.28 0.41 ± 0.10 2,75 4,1
ZZC 0.61 0.52 0.26 0.46 ± 0.15 3,69 3,9
LAC 1.73 1.82 1.50 1.68 ± 0.14 4,00 5,1