Ivoclar Vivadent IPS Eris for E2 - Manual (Page 20)

20
Empress 2 preparation guidelines
and minimum requirements
IPS
Crowns
Evenly reduce the anatomical
shape and observe the
stipulated minimum
thicknesses.
Prepare a 360° shoulder with
rounded inner edges or a
chamfer with an angle of
approx. 10°–30 °. The width
of the circular shoulder/
chamfer is approx. 1 mm.
Reduce the incisal crown
third by approx. 1.5 mm.
Reduce the incisal and
occlusal areas by approx.
1.5–2 mm.
For anterior crowns, the
reduction in the labial and/or
palatal/lingual area is approx.
1.0–1.5 mm.
Bridges
Maximum pontic spans will
vary from patient to patient
depending on the tooth
position, size, condition,
and arch position of the
retainers. Pontic spans
should not exceed 9 mm
posterior to the canine and
11 mm anterior to the
canine. Measurements for
this determination are made
from the un-prepared
abutment surfaces next to
the edentulous space.
10°-30°
10°-30°
1
1
1,5
1,5
2
2
1.5
2
1,5 1,5
1,0 1,0
Occlusal Force
Maximum
Pontic Span
11 mm
Anterior
Maximum
Pontic Span
9 mm
Posterior to
Canine