## 3 Results
### Mineral Analysis
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{8}{c}{**LONGITUDINAL PATTERN**} \\ \hline \multicolumn{2}{c}{**External Dentin**} & \multicolumn{2}{c}{**Middle Dentin**} & \multicolumn{2}{c}{**Deep Dentin**} & \multicolumn{2}{c}{**Pulpal Dentin**} & \multicolumn{2}{c}{**Dentin (Average)**} \\ \hline \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**SD \({}^{\#}\)**} & \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**SD**} & \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**SD**} & \multicolumn{2}{c}{**Mean**} \\ \hline \multicolumn{2}{c}{**Control sample (\(n\) = 18)**} & & & & & & & & \\ \hline \multicolumn{2}{c}{**Total**} & 1.64 & 1.43 & 3.70 & 0.56 & 3.23 & 0.74 & 2.81 & 0.79 & 2.82 & 0.64 \\ \hline \multicolumn{2}{c}{**Study sample (\(n\) = 8)**} & & & & & & & & \\ \hline \multicolumn{2}{c}{**OI-I**} & 1.87 & 1.81 & 3.63 & 0.95 & 2.97 & 1.04 & 2.46 & 0.85 & 2.73 & 0.95 \\ \hline \multicolumn{2}{c}{**OI-III**} & 1.24 & 1.44 & 3.84 & 0.64 & 2.77 & 1.08 & 2.37 & 0.39 & 2.55 & 0.57 \\ \hline \multicolumn{2}{c}{**OI-IV**} & - & - & - & - & - & - & - & - & - & - \\ \hline \multicolumn{2}{c}{**Total**} & 1.55 & 1.55 & 3.73 & 0.76 & 2.87 & 0.99 & 2.42 & 0.61 & 2.64 & 0.73 \\ \hline \multicolumn{2}{c}{**Inter- and intra-group statistical significance**} & & & & & & & & & \\ \hline \multicolumn{2}{c}{**Control-OI \({}^{\#}\)**} & 0.683 & 0.807 & 0.605 & 0.238 & & 0.765 & \\ \hline \multicolumn{2}{c}{**Control-OI type \({}^{\#}\)**} & 0.840 & 0.937 & 0.770 & 0.406 & & 0.669 & \\ \hline \multicolumn{2}{c}{**OI types \({}^{\#}\)**} & 0.886 & \(1\) & 0.886 & 0.686 & & 0.486 & \\ \hline \multicolumn{2}{c}{**CROSS PATTERN**} & & & & & & & & \\ \hline \multicolumn{2}{c}{**External dentin**} & \multicolumn{2}{c}{**Middle dentin**} & \multicolumn{2}{c}{**Deep dentin**} & \multicolumn{2}{c}{**Pulpal dentin**} & \multicolumn{2}{c}{**Dentin (average)**} \\ \hline \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**SD\({}^{\#}\)**} & \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**SD**} & \multicolumn{2}{c}{**Mean**} & \multicolumn{2}{c}{**SD**} & \multicolumn{2}{c}{**Mean**} \\ \hline \multicolumn{2}{c}{**Control sample (\(n\) = 12)**} & & & & & & & \\ \hline \multicolumn{2}{c}{**Total**} & 0.59 & 0.87 & 3.48 & 0.58 & 3.08 & 0.65 & 2.62 & 0.61 & 2.44 & 0.38 \\ \hline \multicolumn{2}{c}{**Study sample (\(n\) = 17)**} & & & & & & & & \\ \hline \multicolumn{2}{c}{**CI-I**} & 2.07 & 1.04 & 3.48 & 0.52 & 3.49 & 0.56 & 1.85 & 1.38 & 2.72 & 0.65 \\ \hline \multicolumn{2}{c}{**OI-III**} & 1.25 & 1.25 & 2.08 & 2.17 & 2.04 & 1.18 & 2.04 & 0.8 & 1.85 & 0.95 \\ \hline \multicolumn{2}{c}{**OI-IV**} & 1.21 & 0.94 & 1.86 & 1.49 & 3.44 & 1.3 & 2.72 & 0.56 & 2.31 & 1 \\ \hline \multicolumn{2}{c}{**Total**} & 1.58 & 1.12 & 2.61 & 1.6 & 2.97 & 1.17 & 2.12 & 1.05 & 2.32 & 0.88 \\ \hline \multicolumn{2}{c}{**Inter- and intra-group statistical significance**} & & & & & & & & \\ \hline \multicolumn{2}{c}{**Control-OI \({}^{\#}\)**} & 0.018 \({}^{\#}\) & 0.227 & 0.983 & 0.263 & & 0.913 & \\ \hline \multicolumn{2}{c}{**Control-OI type \({}^{\#}\)**} & 0.037 \({}^{\#}\) & 0.156 & 0.062 & & 0.333 & & 0.341 & \\ \hline \multicolumn{2}{c}{**OI types \({}^{\#}\)**} & 0.269 & 0.241 & 0.041 \({}^{\star}\) & 0.392 & & 0.345 & \\ \hline \end{tabular}  
* SD—standard deviation., \({}^{\#}\) Exact and asymptotic significance of the Mann–Whitney U Test, \({}^{\#}\) asymptotic significance of the Kruskal–Wallis Test, \({}^{\#}\)\(p\)\(<\) 0.05. Statistical significance.  
\end{table} 
Table 3: Tubular diameter of the control and study sample, measured in \(\mu\)m.