## 3 Results  
This study included 43 patients (19 males and 24 females), ranging in age from 18 to 79 years. A total of 45 monolithic lithium disilicate all-ceramic crowns were produced, including 29 molars (64%) and 16 premolars (35%) were included, of which 28 (62%) were placed in the mandible and 17 (37%) in the maxilla. Among the 45 crowns, 15 were cemented using LinkAce resin cement, 15 with FujiCem2 cement, and 15 with LinkForce resin cement. Mean vertical discrepancy values of the SARC group ranged from 2 to 38 \(\upmu\)m. Overall mean vertical discrepancy was 12.93 \(\pm\) 4.74 \(\upmu\)m (Table 1). Figure 1: Six points showing differences (mm) between pre-cementation and post-cementation superimposed on standard tessellation language (STL) files showing 6 measurement points. Mean vertical discrepancy values in the RMGIC group ranged from 3 to 38 \(\upmu\)m. Overall mean vertical discrepancy was 19.05 \(\pm\) 4.60 \(\upmu\)m (Table 2). Vertical discrepancy values in the ARC group ranged from 4 to 35 \(\upmu\)m and the mean vertical discrepancy value was 13.69 \(\pm\) 5.17 \(\upmu\)m (Table 3). There were no significant differences between the discrepancy values at the 2 measurement points in the SARC group (\(p\) = 0.377), the RMGIC group (\(p\) = 0.388), or the ARC group (\(p\) = 0.905). ANOVA with Bonferroni correction showed a significant difference in the mean vertical discrepancy values between groups. RMGIC group had significantly higher mean discrepancy values than the SARC (\(p\) = 0.004) and ARC groups (\(p\) = 0.013). Distal marginal ridge (DMR) measurements were significantly different between the SARC-RMGIC (\(p\) < 0.001) and RMGIC-ARC (\(p\) = 0.021) groups. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Tooth Area** & **N** & **Maximum** & **Minimum** & **Mean** &
\begin{tabular}{c} **Standard** \\ **Deviation** \\ \end{tabular} \\ \hline Mesio-buccal & 15 & 38 & 3 & 16.26 & 9.96 \\ Distobuccal & 11 * & 23 & 6 & 14.64 & 5.22 \\ Distolingual & 15 & 34 & 2 & 14.27 & 8.92 \\ Mesio-lingual & 11 * & 23 & 6 & 14.64 & 4.76 \\ Mesial marginal ridge & 15 & 30 & 2 & 12.07 & 6.84 \\ Distal marginal ridge & 15 & 15 & 2 & 7.67 & 4.46 \\ Mean for tooth ** & 15 & & & 12.93 & 4.74 \\ \hline \hline \end{tabular}  
* Four pre-molars were included. The buccal cusp was considered as meso-buccal cusp, and the lingual cusp as distolingual cusp. ** Overall mean of the 6/4 measurements per tooth.  
\end{table} 
Table 1: Occlusal vertical discrepancies (\(\upmu\)m) of crowns in the self-adhesive resin cement (SARC) group measured at 6 points in each tooth. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Tooth Area** & **N** & **Maximum** & **Minimum** & **Mean** &
\begin{tabular}{c} **Standard** \\ **Deviation** \\ \end{tabular} \\ \hline Mesio-buccal & 15 & 38 & 11 & 19.73 & 7.25 \\ Distobuccal & 10 * & 27 & 4 & 11.1 & 6.79 \\ Distolingual & 15 & 38 & 5 & 19.67 & 8.49 \\ Mesio-lingual & 10 * & 40 & 3 & 14.5 & 10.06 \\ Mesial marginal ridge & 15 & 70 & 3 & 16.8 & 15.59 \\ Distal marginal ridge & 15 & 50 & 10 & 25.13 & 13.28 \\ Mean for tooth ** & 15 & & & 19.05 & 4.60 \\ \hline \hline \end{tabular}  
* Five pre-molars were included. The buccal cusp was considered as meso-buccal cusp, and the lingual cusp as distolingual cusp. ** Overall mean of the 6/4 measurements per tooth.  
\end{table} 
Table 2: Occlusal vertical discrepancies (\(\upmu\)m) of crowns in resin-modified glass ionomer cement (RMGIC) group measured at 6 points in each tooth.