Ivoclar Vivadent IPS e.max CAD Abutment Solutions - Manual (Page 12)

12
Layer thicknesses of the ceramic components
Observing the geometry requirements of the IPS e.max CAD ceramic structures is the key to success for a durable restoration.
The more attention is given to the design, the better the final results and the clinical success will turn out to be.
The following basic guidelines have to be observed:
Wall thickness W
HAK
Width
hybrid abutment crown B
HAK
Width crown B
Crown
Hybrid abutment crown Hybrid abutment
– The wall thickness of hybrid abutment crown
W
HAK
must be larger than 1.5 mm for the entire
circumference.
– The opening of the screw channel must not be
located in the area of contact points. If this is not
possible, a hybrid abutment with a separate crown
would be preferred.
– The width of the hybrid abutment crown B
HAK
is
limited to 6.0 mm from the axial height of contour
to the screw channel.
– The notes of the implant manufacturer must be
observed regarding the maximum height of the
hybrid abutment crown.
– The wall thickness W
HA
, must be at least 0.5 mm.
– The hybrid abutment should be designed in a
similar way as a prepared natural tooth:
– Circular epi-/supragingival shoulder with rounded
inner edges or a chamfer.
– In order for the crown to be cemented to the
hybrid abutment using a conventional/self-
adhesive cementation protocol, retentive surfaces
and a sufficient "preparation height" must be
observed.
– Create an emergence profile with a right angle at
the transition to the crown (see picture).
– The crown width B
Crown
is limited to 6.0 mm from
the axial height of contour to the screw channel of
the hybrid abutment.
– The notes of the implant manufacturer must be
observed regarding the maximum height of the
hybrid abutment and separate crown.
Wall thickness W
HA