Dental cement: Difference between revisions
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| ⚫ | '''Dental cements''' are hard, brittle materials formed by mixing powder and liquid together. Dental cements are used for a variety of dental and orthodontic applications, inluding use as [[luting agent]]s, [[pulp (tooth)|pulp]]-protecting agents or [[dental caries|cavity]]-lining material. Furthermore, they are used to form an insulating layer under metallic or ceramic [[dental restoration|restorations]], and protect the pulp from injury. This helps in sealing or fixing and casting [[inlays]], [[onlays]] or any such substance to both [[dentin]] and [[enamel]].<ref>{{cite web |
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| ⚫ | '''Dental cements''' are hard, brittle materials formed by mixing powder and liquid together. Dental cements are used for a variety of dental and orthodontic applications, inluding use as [[luting agent]]s, [[pulp (tooth)|pulp]]-protecting agents or [[dental caries|cavity]]-lining material. Furthermore, they are used to form an insulating layer under metallic or ceramic [[dental restoration|restorations]], and protect the pulp from injury. This helps in sealing or fixing and casting [[inlays]], [[onlays]] or any such substance to both [[dentin]] and [[enamel]] |
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| title = dental cement |
| title = dental cement |
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| work = definition of dental cement |
| work = definition of dental cement |
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| date = 2007 |
| date = 2007 |
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| url = http://medical-dictionary.thefreedictionary.com/dental+cement |
| url = http://medical-dictionary.thefreedictionary.com/dental+cement |
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| accessdate = August 11, 2008}}</ref> |
| accessdate = August 11, 2008}}</ref> |
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==Composition and classification== |
==Composition and classification== |
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Cements are classified on the basis of their components. In dentistry they are mainly composed of [[zinc oxide]](ZnO)-[[eugenol]], [[zinc phosphate]] (Zn<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>), [[silicate]], zinc [[polyacrylate]], calcium hydroxide, or [[glass ionomer cement|glass ionomer (GIC)]]. Those containing zinc oxide powder include zinc oxide, zinc phosphate and zinc silicophosphate cements. Cements containing leachable glass powder are GIC, silicate and silicophosphate. |
Cements are classified on the basis of their components. In dentistry they are mainly composed of [[zinc oxide]](ZnO)-[[eugenol]], [[zinc phosphate]] (Zn<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>), [[silicate]], zinc [[polyacrylate]], calcium hydroxide, or [[glass ionomer cement|glass ionomer (GIC)]]. Those containing zinc oxide powder include zinc oxide, zinc phosphate and zinc silicophosphate cements. Cements containing leachable glass powder are GIC, silicate and silicophosphate.<ref>{{cite web |
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| last = Spiller |
| last = Spiller |
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| first = Martin S. |
| first = Martin S. |
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Revision as of 16:03, 11 August 2008
Dental cements are hard, brittle materials formed by mixing powder and liquid together. Dental cements are used for a variety of dental and orthodontic applications, inluding use as luting agents, pulp-protecting agents or cavity-lining material. Furthermore, they are used to form an insulating layer under metallic or ceramic restorations, and protect the pulp from injury. This helps in sealing or fixing and casting inlays, onlays or any such substance to both dentin and enamel.[1]
Composition and classification
Cements are classified on the basis of their components. In dentistry they are mainly composed of zinc oxide(ZnO)-eugenol, zinc phosphate (Zn3(PO4)2), silicate, zinc polyacrylate, calcium hydroxide, or glass ionomer (GIC). Those containing zinc oxide powder include zinc oxide, zinc phosphate and zinc silicophosphate cements. Cements containing leachable glass powder are GIC, silicate and silicophosphate.[2]. Less commonly used cements include those containing liquid polyacrylic acid (resin cement) and those containing phosphoric acid (zinc phosphate cement). [citation needed]
Requirements
The requirements for dental cements are that they should:
- Be non irritant to pulp and gingiva (gums) and should not support the growth of secondary caries. (This last property is called cariostatic or anticariogenicity).
- Form a strong bond with enamel and dentin.
- Provide good marginal sealing to prevent marginal leakage.
- Be resistant to dissolution in saliva, or in any other oral fluid.
- Have good aesthetics and good thermal and chemical resistance. (Opacity to X-rays is also preferred for diagnostic purposes).
References
- ^ "dental cement". definition of dental cement. The Free Dictionary by Farlex. 2007. Retrieved August 11, 2008.
- ^ Spiller, Martin S. (2000). "Composite materials". Doctorspiller.com. Retrieved August 11, 2008.