28: Inorganic (acid–base reaction) cements

28

Inorganic (acid–base reaction) cements

Figure 28.1 Setting reaction of glass ionomer cement (GIC).

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Box 28.1 Types of permanent dental cement
Zinc phosphate
Zinc polycarboxylate
Glass ionomer
Calcium aluminate/glass ionomer
Hybrid (resin-reinforced) ionomer
Resin

Table 28.1 Approximate composition of zinc phosphate (ZNP) cement

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Table 28.2 Average properties of inorganic cements

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Table 28.3 Zinc polycarboxylate and GIC characteristics compared with those of zinc phosphate (ZNP) cement

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Characteristic Zinc polycarboxylate Glass ionomer cement
Film thickness Same or slightly greater Same or slightly less
Compressive strength Lower Greater
Tensile strength Greater Lower (GICs tend to be brittle)
Solubility Lower Greater
Working time Comparable Slightly shorter
Setting time Comparable Longer (requires initial isolation)
Bonding (ZNP only bonds mechanically) Mechanical, some chemical Mechanical and chemical
Biological reactions
Jan 1, 2015 | Posted by in Dental Materials | Comments Off on 28: Inorganic (acid–base reaction) cements
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