From: SEM characterization and ageing analysis on two generation of invisible aligners
Relative error | |
---|---|
For LD30x | \(\varepsilon ^{{t_{x} }} _{{STXrel}} = \frac{{LD30X_{{t_{x} }} - \mu (LD30X_{{t_{0} }} )}}{{\mu (LD30X_{{t_{0} }} )}}\) |
For EX30x | \(\varepsilon ^{{t_{x} }} _{{EXXrel}} = \frac{{EX30X_{{t_{x} }} - \mu (EX30X_{{t_{0} }} )}}{{\mu (EX30X_{{t_{0} }} )}}\) |
Mean values | |
For LD30x | \(\mu (\varepsilon ^{{t_{1} }} _{{LD30Xrel}} )\); \(\mu (\varepsilon ^{{t_{2} }} _{{LD30Xrel}} )\);\(\mu (\varepsilon ^{{t_{3} }} _{{LD30Xrel}} )\) |
For EX30x | \(\mu (\varepsilon ^{{t_{1} }} _{{EX30Xrel}} )\); \(\mu (\varepsilon ^{{t_{2} }} _{{EX30Xrel}} )\);\(\mu (\varepsilon ^{{t_{3} }} _{{EX30Xrel}} )\) |
Standard deviation | |
For LD30x | \(\sigma (\varepsilon ^{{t_{1} }} _{{LD30Xrel}} )\); \(\sigma (\varepsilon ^{{t_{2} }} _{{LD30Xrel}} )\);\(\sigma (\varepsilon ^{{t_{3} }} _{{LD30Xrel}} )\) |
For EX30x | \(\sigma (\varepsilon ^{{t_{1} }} _{{EX30Xrel}} )\); \(\sigma (\varepsilon ^{{t_{2} }} _{{EX30Xrel}} )\);\(\sigma (\varepsilon ^{{t_{3} }} _{{EX30Xrel}} )\) |