Ivoclar Vivadent IPS InLine System - Manual (Page 10)

10
Preparation guidelines and minimum layer thicknesses
The preparation must provide sufficient space to achieve stable and esthetic metal-ceramic restorations. The usual preparation guidelines for
metal-ceramics apply for the IPS InLine System. As usual for metal-supported restorations, dentists may use conventional cementation.
A chamfer preparation is suitable for tapered metal margins. For metal-supported inlays, partial crowns and inlay-retained bridges that are
seated using conventional cementation, a chamfer preparation is indicated to minimize the cement gap. The margin is designed in metal.
For esthetically pleasing single crowns and bridge abutment crowns, a ceramic shoulder should be provided. For that purpose, a shoulder
preparation is required. With adhesive cementation, the margin can be designed in the ceramic. However, the margin should not be bevelled
in such cases, since thin, non-metal-supported margins demonstrate a fracture risk.
– With conventional cementation, a minimum height of 3 mm of the prepared tooth and a convergence angle of approx. 6° must be
observed.
– The following minimum connector dimensions should be observed for bridge restorations: The connector dimensions depend on the
selected alloy and the pontic width (see Framework Design Guidelines, page 9).
2.0
>1.2
1.5 1.5
>1.2
1.5
2.0 2.0
1.5
>1.2 >1.2
6°
1.5
2.0
>1.2
1.5 1.5
>1.2
1.5
2.0 2.0
1.5
>1.2 >1.2
6°
1.5
2.0
>1.2
1.5 1.5
>1.2
1.5
2.0 2.0
1.5
>1.2 >1.2
6°
1.5
Dimensions in mm
veneers on refractory die material
Minimum dimensions for metal frameworks
– Crowns min. 0.3 mm
– Abutment crowns min. 0.5 mm
Minimum ceramic layer thickness
– IPS InLine One min. 0.8 mm
Minimum dimensions for metal frameworks
– Crowns min. 0.3 mm
– Abutment crowns min. 0.5 mm
Minimum ceramic layer thickness
– IPS InLine min. 0.8 mm
Minimum dimensions for metal frameworks
– Crowns min. 0.3 mm
– Abutment crowns min. 0.5 mm
Minimum ceramic layer thickness
– IPS InLine PoM min. 0.8 mm
IPS InLine One
One-layer metal-ceramic
IPS InLine
Conventional metal-ceramic
IPS InLine PoM
Press-on-Metal ceramic