Ivoclar Vivadent IPS Empress CAD Labside - Manual (Page 32)

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The cut-back is conducted in 3 steps. Only in this way is a targeted and controlled reduction possible. The following
working procedure should be observed:
– Use only suitable grinding instruments for the cut-back (e.g. ceramic-bonded grinding instruments and diamonds) at low
speed.
– Too much pressure and excess heat development during grinding must be prevented.
– The thickness of the reduced IPS Empress CAD restoration must not fall below the required minimum of 0.5 mm.
– Step 1: Proximal cut-back - the mesial and distal ridges are reduced.
– Step 2: Labial/incisal cut-back - volume and length are tapered and reduced
– Step 3: Mamelon cut-back - design life-like mamelons using abrasive silicone disks at low pressure.
– Refrain from designing too extreme mamelons with undercuts.
Too much pressure and excess heat development during cut-back must be prevented. Step 1: Proximal cut-back – the mesial and distal ridges are reduced.
Step 2: Labial/incisal cut-back – volume and length are tapered and reduced.
Completed cut-back of the incisal third.
Step 3: Mamelon cut-back – design lifelike mamelons using abrasive silicone disks.
Refrain from designing too extreme mamelons with undercuts.