Crown & Bridge Cementation Tips

1. Tooth should present as smooth a surface as possible. Smooth dentin surfaces are more easily cleaned of debris that can inhibit chemical bonding.
2. Avoid contaminating surface of dentin with wax, oil, varnish or any protein material, which can inhibit chemical bonding.
3. 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.
4. Never use varnishes to protect tooth if polyacrylic acid cements are used (prevents bonding to tooth structure).
5. 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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