Assessment of setting time and solubility of manufactured dental base materials from enamel powder and synthetic hydroxyapatite with or without CO2 laser treatment

A, Hussein; J.Al- Azzawi, Haitham; R. Al-Jabouri, Mohammed; Nafie.A.Talfah,

	Assessment of setting time and solubility of manufactured dental base materials from enamel powder and synthetic hydroxyapatite with or without CO2 laser treatment
Journal of baghdad college of dentistry
Article 1, Volume 21, Issue 4, 2009, Pages 19-23
Authors
Hussein A; Haitham J.Al- Azzawi; Mohammed R. Al-Jabouri;
Abstract
ABSTRACTBack ground: This study was done to assist setting time, solubility of manufactured dental base materials from enamelpowder and synthetic hydroxyapatite with or without CO2 lasers treatment.Materials and Methods: The ratio of the elements of the manufactured base materials and the parameters of CO2laser (15.92W/cm2 power density and 0.2 seconds exposure time) were detected from the pilot study, the setting timeand solubility tests described by British standard specification for zinc polycarboxylate cement was used in this studyResults: The results showed that the manufactured base material that contains mixture of enamel powder andhydroxyapatite without CO2 laser treatment has (29.47±2) minutes setting time, and (1.136 ±0.5)% solubility, while themanufactured base material that contains mixture of enamel powder and hydroxyapatite with CO2 laser treatmenthas (26.1±3.8) minutes setting time, and(2.66± 0.5)% solubility. While the manufactured base material that containshydroxyapatite powder with CO2 laser treatment has (16.7±4.5) minutes setting time, and (1.78±0.5) % solubility.Conclusion: The manufactured base materials that contains enamel powder has longer setting time and the CO2laser treatment will reduce the setting time of all types of the manufactured base materials, the base materials thatcontains synthetic hydroxyapatite has higher solubility than other base materials and the CO2 laser treatment willreduce the solubility of the manufactured base materials.Key words: Setting time, solubility, laser. (J Bagh Coll Dentistry 2009; 21(4): 19-23).

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