## 3 Results
### Qualitative Analysis  
The color-coded map represents the occlusal surface deviations between the comparison data of the three experimental groups and the reference data. The representative results of the qualitative analysis are presented in Figure 7. Areas in green (i.e., within the tolerance range) were considered positions that required no clinical occlusal adjustment. The areas coded in red (i.e., positive deviation out of the tolerance range) signified occlusal errors that required clinical occlusal adjustment. The areas in blue (i.e., negative deviation out of the tolerance range) implied an over-correction in the laboratory occlusal adjustment or over-milling due to a limitation of the milling machine.  
Figure 5: The RMS values of the three experimental groups (NA, PSM, and SA). The RMS value represents the amount of occlusal error compared to the reference data (POST). The mean of the RMS of the PSM group was lower than those in the other groups. However, there was no significant difference in the one-way ANOVA between the three groups. NA, the group with no adjustment; PSM, the group adjusted using Patient Specific Motion; SA, the group adjusted with a semi-adjustable articulator; RMS, root mean square.  
Figure 6: The RMS values outside of the tolerance area. Asterisks (*) indicate significant differences in the RMS values between groups in the post hoc analysis. NA, the group with no adjustment; PSM, the group adjusted using Patient Specific Motion; SA, the group adjusted with a semi-adjustable articulator; RMS, root mean square.  
In the three groups, most of the occlusal surfaces were coded green. The red-coded areas indicating occlusal error were mainly on the cusp tip and the inclined plane of the cusp. In some cases in the NA and PSM groups, the central groove was coded blue. The PSM group showed a decreased extent of occlusal error compared to the other groups (Figure 7). The areas of occlusal error were mainly reduced in the triangular ridge, the lingual inclined plane of the buccal cusp, and the buccal inclined plane of the lingual cusp. However, in the cusp tip and central fossa, the areas of occlusal error remained. The SA group also exhibited a decrease in the red-coded area compared to the NA group. Most positions of the reduced areas were like that in the PSM group. However, in some cases, the reduced error area was different than that of the PSM group (Figure 7C). In addition, there were some cases in which an extensive negative deviation area appeared, which meant that there was an over-correction (Figure 7B). The occlusal error area of the NA group mainly showed on the cusp tip, triangular ridge, and inclined plane of the cusp.  
Figure 7: Representative images of the color-coded maps showing the deviations between the comparison data (NA, PSM, and SA) and the reference data (POST). The red-coded areas (i.e., positive deviation out of the tolerance range) suggested occlusal error that required clinical occlusal adjustment. (**A**) The PSM and SA groups showed less red-coded areas than the NA group. (**B**) In some cases, there were extensively blue-coded areas in the SA group, indicating over-correction. (**C**) Reduced red-coded areas were observed in different positions between the PSM and SA groups.