Why all-ceramic crowns?

Article Abstract:

All-ceramic (AC) crowns may be useful in certain patients but they will probably not last as long as porcelain-fused-to-metal (PFM) crowns. AC crowns do not have a metal understructure as PFM crowns do. The most popular types of AC crowns include pressed ceramic crowns, slip-cast crowns and high-strength porcelain crowns. All give very good esthetic results but are more expensive and more difficult to remove when the crown is replaced. They are most often used in patients who have metal allergies or do not want metal in their mouth and patients who want the optimum esthetic effect.

Materials, Dental ceramics

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Cementing porcelain-fused-to-metal crowns

Article Abstract:

Resin-reinforced glass ionomer (RRGI) cements appear to be better than zinc phosphate and glass ionomer cements when placing porcelain-to-metal crowns. All cements for this purpose should be easy to use, strong, bond well to the tooth, be insoluble in mouth fluids and cause no postoperative sensitivity. Research has shown that RRGI cements fulfill these characteristics better than other cements. This may explain why they have become the cement of choice even though they have only been marketed since the early 1990's. However, they should not be used on all-ceramic crowns.

Equipment and supplies, Dental adhesives

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The confusing array of tooth-colored crowns

Article Abstract:

Non-metal-containing dental crowns are more esthetic than porcelain-fused-to-metal (PFM) crowns and should be used in patients who have an allergy to metal as well as those who grind their teeth at night. Otherwise, dentists can stick with PFM crowns, which have been used successfully since the 1960s and still dominate the market.

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