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The data was compared with a 2-way ANOVA and Tukey-Kramer post-hoc test (p=0.05).
Results: IPS e.max: Groups bonded with primer produced higher retention compared groups bonded with no primer (p0.05) was observed among groups except Brush and Bond/Hyperfil/ (No Primer and Metal Primer), Brush and Bond/(Hyperfil/No Primer and Secure/Metal Primer), Brush and Bond/ (Hyperfil/No Primer and Secure/Primer).
Following the orientation groove placement (69L bur), the preparations were scanned using CEREC 3D/Sirona (crowns) and LAVA COS/3M ESPE (LAVA crowns). The preparations were imaged with a digital microscope (Keyence/ VHX-600) at 20X magnification and the surface area of each preparation was calculated.
The bonding area was used to calculate the bond strength by dividing the failure load with the bonded surface area.
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