- Princess crowns
or bridges can be cemented with any conventional cement (Glass Ionomer,
Zinc Phosphate) or Composite Resin Cement (Panavia 21).
NOTE: Cements with higher expansion rates (e.g., hybrid ionomer cements)
must NOT be used.
- Tooth should present
as smooth a surface as possible. Smooth dentin surfaces are more easily
cleaned of debris, which can inhibit chemical bonding.
- Avoid contaminating
surface of dentin with wax, oil, varnish or any protein material, which
can inhibit chemical bonding.
- Clean tooth surfaces.
Tooth surface should not be dehydrated when cement is applied. Excessive
drying concentrates protein debris and prevents efficient wetting of
tooth surface.
- Never use varnishes
to protect tooth if polyacrylic acid cements are used (prevents chemical
bonding to tooth structure).
- Margins of cement
should be protected with varnish after initial set (5 to 6 minutes).
Under no circumstances should saliva come into direct contact with unset
cement.
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