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Acid neutralization capacity of a tricalcium silicate-containing calcium phosphate cement as an endodontic material
A calcium phosphate cement (CPC) was shown to have the necessary attributes for endodontic materials except adequate basicity needed for antimicrobial properties. To enhance its basicity, tricalcium silicate (Ca3SiO5), a highly alkaline compound, was added to CPC at a mass fraction of 0.25, 0.5 or 0.75. The basicity, acid neutralization and physical properties of the CPC-Ca3SiO5 composites were investigated. Mineral trioxide aggregate (MTA) was used as the control. The acid neutralizing capacity of the CPC-Ca3SiO5 composites and MTA were measured by titrating the suspensions of ground set samples with a 0.2 mol/L HCl at predetermined pH levels, i.e., 11, 9.0, and 7.4. The setting time of CPC-Ca3SiO5 composites determined by the Gilmore needle method was 40 plus/minus 10 min. Acid neutralizing capacity of CPC depended (p less-than 0.05) on Ca3SiO5 content. CPC containing 75 % Ca3SiO5 could neutralize slightly less acid than MTA (p less-than 0.05), but it had a shorter setting time than that of MTA (greater-than 4 h) and excellent handling properties.
Acid neutralization capacity of a tricalcium silicate-containing calcium phosphate cement as an endodontic material
A calcium phosphate cement (CPC) was shown to have the necessary attributes for endodontic materials except adequate basicity needed for antimicrobial properties. To enhance its basicity, tricalcium silicate (Ca3SiO5), a highly alkaline compound, was added to CPC at a mass fraction of 0.25, 0.5 or 0.75. The basicity, acid neutralization and physical properties of the CPC-Ca3SiO5 composites were investigated. Mineral trioxide aggregate (MTA) was used as the control. The acid neutralizing capacity of the CPC-Ca3SiO5 composites and MTA were measured by titrating the suspensions of ground set samples with a 0.2 mol/L HCl at predetermined pH levels, i.e., 11, 9.0, and 7.4. The setting time of CPC-Ca3SiO5 composites determined by the Gilmore needle method was 40 plus/minus 10 min. Acid neutralizing capacity of CPC depended (p less-than 0.05) on Ca3SiO5 content. CPC containing 75 % Ca3SiO5 could neutralize slightly less acid than MTA (p less-than 0.05), but it had a shorter setting time than that of MTA (greater-than 4 h) and excellent handling properties.
Acid neutralization capacity of a tricalcium silicate-containing calcium phosphate cement as an endodontic material
Cherng, A.Maria (author) / Takagi, Shozo (author) / Chow, Laurence C. (author)
2010
6 Seiten, 17 Quellen
Article (Journal)
English
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