Cavity Preparation :-● No cavity outline, no particular shape● Outline is determined by caries margin● Anterior prep ー give beveling is must; retention● Posterior prepー no beveling at cavo surface angle, 90 degree is okay – Because it can't take masticatory load – might fracture ∴ causes microleakage would happenBASE UNDER COMPOSITEPreferred Ca(OH)2 or GIC or any modifications – RMGI – best Zn Phosphate Zn polycarboxylateContra indicated● ZnOE● Varnish● Hydrogen peroxide [that's why wait 1 week after intra-coronal bleach (bleaching agents)Q. Dentist provided bleaching which also known as (home bleaching) (night guard Vita Bleaching) contain : 5 - 22 % carbamide peroxide.Q. After bleaching a tooth, we want to restore the tooth with composite resin, we don’t want to compromise the bonding, and we wait for: 1-2 Weeks.

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