## 3 Results
### Evaluation of Results
#### 3.3.2. Zirconium Oxide Materials
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**FS (MPa) 30 min**} \\ \hline
**Authors** & **Ceramics/Manufacturer** & \begin{tabular}{c} **Heat Teatment/Furnace** \\ **Manufacturer** \\ \end{tabular} & **Time** & \begin{tabular}{c} **FS** \\ **(MPa)** \\ \end{tabular} & \begin{tabular}{c} **FS** \\ **(MPa)** \\ \end{tabular} & \begin{tabular}{c} **FS** \\ **(MPa)** \\ \end{tabular} & \begin{tabular}{c} **FS** \\ **SD** \\ \end{tabular} \\ \hline \begin{tabular}{c} Lawson NC et al. \\ 2020 [34] \\ \end{tabular} & \begin{tabular}{c} Katana STML Bloc \\ Kuraray Noritake \\ \end{tabular} & \begin{tabular}{c} 1600 \({}^{\circ}\)C SpeedFire \\ Dentsply Sirona \\ \end{tabular} & 30 min & 788 & 28 \\ \hline \begin{tabular}{c} Lawson NC et al. \\ 2020 [34] \\ \end{tabular} & \begin{tabular}{c} Prettau Previous \\ Zirconzahn \\ \end{tabular} & \begin{tabular}{c} 1600 \({}^{\circ}\)C SpeedFire \\ Dentsply Sirona \\ \end{tabular} & 30 min & 557 & 46 \\ \hline \begin{tabular}{c} Lawson NC et al. \\ 2020 [34] \\ \end{tabular} & \
\begin{tabular}{c} TOSOH \\ Noritake KATANA \\ \end{tabular} &
\begin{tabular}{c} 1600 \({}^{\circ}\)C SpeedFire \\ Dentsply Sirona \\ \end{tabular} & 30 min & 493 & 65 \\ \hline \hline \end{tabular}  
SD: Standard deviation; MPa: Megapascals; FS: Flexural strength.  
\end{table} 
Table 8: FS results of the zirconium oxide ceramics group in a 30 min period. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**FS (MPa) 2 h**} \\ \hline  
SD: Standard deviation; MPa: Megapascals; FS: Flexural strength.  
\end{table} 
Table 9: FS results of the zirconium oxide ceramic group in a period of 2 h.  
Regarding MH and FT, a study evaluated the Razor Zirconia ceramic from the manufacturer U&C International by applying different heat units. The results favored the 1430 \({}^{\circ}\)C condition [42], detailed exhaustively in Tables 11 and 12. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**FS (MPa) 7-8 h**} \\ \hline
**Authors** & **Ceramics/Manufacturer** & \begin{tabular}{c} **Heat** \\ **Teatment/Furnace** \\ **Manufacturer** \\ \end{tabular} & **Time** & \begin{tabular}{c} **FS** \\ **(MPa)** \\ \end{tabular} & \begin{tabular}{c} **FS** \\ **(MPa)** \\ \end{tabular} & \begin{tabular}{c} **FS** \\ **SD** \\ \end{tabular} \\ \hline Lawson NC et al. & Katana STML Bloc & \begin{tabular}{c} 1550 \({}^{\circ}\)[PERSON] \\ KATANA \\ Kuraray Noritake \\ \end{tabular} & 7 h & 761 & 6.80 \\ \hline Lawson NC et al. & Prettau Previous & \begin{tabular}{c} 1550 \({}^{\circ}\)[PERSON] \\ KATANA \\ Kuraray \\ \end{tabular} & 7 h & 787 & 50.48 \\ \hline Lawson NC et al. & Zpex Smile & \begin{tabular}{c} 1550 \({}^{\circ}\)[PERSON] \\ KATANA \\ Kuraray \\ \end{tabular} & 7 h & 789 & 6.56 \\ \hline Hatanaka GR, Polli & \begin{tabular}{c} 1500 \({}^{\circ}\)C Lava Furnace \\ 200 \\ 3M \\ \end{tabular} & \
\begin{tabular}{c} 1500 \({}^{\circ}\)C Lava Furnace \\ 200 \\ Dental-Keramiköfen \\ GmbH \\ \end{tabular} & 8 h & 642 & 699.3 \\ \hline Kongkiatkamon S & Katana STML Block &
\begin{tabular}{c} 1550 \({}^{\circ}\)C Infire \\ Kuraray Noritake \\ \end{tabular} & 7 h & 466 & 22.89 \\ \hline \hline \end{tabular}  
* SD: Standard deviation; MPa: Megapascals; FS: Flexural strength.  
\end{table} 
Table 10: FS results of the zirconium oxide ceramics group in a time range of 7–8 h.