Chemically-curing type glass ionomer cement

Compositions: coating or plastic – Coating or plastic compositions – Dental

Reexamination Certificate

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Details

C433S001000, C433S228100, C623S023620

Reexamination Certificate

active

08083844

ABSTRACT:
This invention provides quality and safe chemically-curing type GIC that solves all the disadvantages of light-curing type GIC, and has mechanical strength not lower but higher than that of light-curing type GIC and, in addition to this, the original features and advantages of GIC. The chemically-curing type glass ionomer cement according to the present invention includes porous and particulate hydroxy apatite that has a means diameter of not less than 0.6 μm and less than 100 μm and a large specific surface, and is added and mixed into the glass ionomer cement.

REFERENCES:
patent: 2005/0260269 (2005-11-01), Engelbrecht et al.
patent: 5-168692 (1993-07-01), None
patent: 2001-354509 (2001-12-01), None
Luas et al, “Toughness, bonding and fluoride-release propeties of hydroxyapatite-added glass ionomer cemt”, Biomaterials, 24 (2003), pp. 3787-3794.
A.U.J. Yap et al., “Experimental studies on a new bioactive material”, Biomaterials, vol. 23, 2002, pp. 955-962, XP-002589077.
Extended European Search Report for corresponding EP Application No. 07742320.0-1219, Jul. 12, 2010.
Empizo, et al., “Strengthening the Matrix of a Glass Ionomer Cement Using Hydroxyapatite”, Pediatric Dentistry Journal, vol. 39, No. 2, 2001, p. 338.
Arita et al., The Effect of Adding Hydroxyapatite Whiskers on the Flexural Strength of Glass-Ionomer Cement (Part 1), Pediatric Dentistry Journal, vol. 38, No. 2, 2000, p. 368.
Yamamoto, “Fundamental Study about the Synthetic Hydroxyapatite-Polyacrylic Acid Composite Material Based on Glass Ionomer Cement Medium”, The Journal of the Japanese Society for Dental Materials and Devices, vol. 3, No. 6, 1984, pp. 787 to 796, p. 789, III-1; p. 790; Fig. 4.
Gu et al., “Effects of incorporation of HA/Zr02into glass ionomer cement (GIC)”, Biomaterials, vol. 26, No. 7, 2005, pp. 713-720.
Suwa, “Development of Bioceramics for Medical Filling Material and Prosthetic Material”, New-ceramics, No. 10, pp. 11-17, p. 16, 2.3, 1994, Japan.
Arita et al., “The Effect of Adding Hydroxyapatite on the Flexural Strength of Glass Ionomer Cement”, Dental Materials Journal, vol. 22, No. 2, 2003, pp. 126-136.
Lucas et al., “Toughness, bonding and fluoride-release properties of hydroxyapatite-added glass ionomer cement”, Biomaterials, vol. 24, 2003, pp. 3787-3794.

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