RBC Class V

when is class V

smooth facial and lingual surfaces in gingival third

Remove?

Where is bevel?

remove undermined enamel and bevel margins

Incisal margin only

What is the acid etch?

35% phosphoric acid

Contour of class V RBC

smooth convex

What is flash? what is ditching?

excess over margins

deficiencies

When do you etch

then?

first: enamel then dentin, for less than 15 s

suction etch with HVE (DO NOT LEAVE ANY = defective in future/recurrent/sensitivity)

rinse for 15 s, in clinic do not desiccate dentin needs to be moist

prime step

microbrush apply adhesive: air syringe used to evaporate solvent, should be shiny

Dry from distance with low pressure, then up close

How long to light cure for Light curing?

20 s

max increment

2 mm

steps in final contouring and finishing

excess?

flame diamond bur on low speed: contour from occlusal and gingival surfaces

excess: 12 blade

cups: use water, dont apply pressure!

same with polishing step of brush:

then gray polish