Abstract: A preform intended for the production of a dental prosthesis. The preform includes a group of agglomerated ceramic, glass-ceramic or glass particles, such that, as volume percents: more than 40% and less than 90% of the particles of said group have a size greater than 0.5 ?m and less than 3.5 ?m, said particles hereinafter being denoted “enamel particles”, and more than 10% and less than 60% of the particles of said group have a size greater than 3.5 ?m and less than 5.5 ?m, said particles hereinafter being denoted “dentine particles.” The microstructure of the preform is such that there is an axis X, termed “axis of variation”, along which the Ve/(Ve+Vd) ratio changes continuously, Ve and Vd denoting the volume percents of enamel particles and of dentine particles, respectively. The enamel and dentine particles representing, together, more than 90% of the volume of the agglomerated particles.

Abstract: A preform intended for the production of a dental prosthesis. The preform includes a group of agglomerated ceramic, glass-ceramic or glass particles, such that, as volume percents: more than 40% and less than 90% of the particles of said group have a size greater than 0.5 ?m and less than 3,5 ?m, said particles hereinafter being denoted “enamel particles”, and more than 10% and less than 60% of the particles of said group have a size greater than 3.5 ?m and less than 5.5 ?m, said particles hereinafter being denoted “dentine particles.” The microstructure of the preform is such that there is an axis X, termed “axis of variation”, along which the Ve/(Ve+Vd) ratio changes continuously, Ve and Vd denoting the volume percents of enamel particles and of dentine particles, respectively. The enamel and dentine particles representing, together, more than 90% of the volume of the agglomerated particles.

Abstract: A method of fabricating a dental prosthesis, the method comprising the following steps: a) preparing a paste by mixing a particulate filler and a resin suitable for forming a binder phase by hardening; b) hardening the paste prepared in step a), optionally after shaping it, so as to form a solid composite mass; c) optionally cutting the solid composite mass so as to form at least one composite block; and d) optionally machining the composite block so as to form a dental prosthesis; in which method, in step b) the hardening is performed at a pressure greater than 500 bar, and the pressure is returned to atmospheric pressure once all of the resin has hardened.

Abstract: Methods of producing a composite block intended for the production of a dental prosthesis including the following steps: a) impregnating a porous support with a liquid resin and b) curing the liquid resin impregnating the support are provided. In such methods of producing a composite block intended for the production of a dental prosthesis, a volume of liquid resin that is greater than the volume of the open pores of the support by at least 2% is caused to penetrate into the support and to cure therein, said volumes being measured at a temperature of 20° C. and at a pressure of 1 bar.

Abstract: Methods of producing a composite block intended for the production of a dental prosthesis including the following steps: a) impregnating a porous support with a liquid resin and b) curing the liquid resin impregnating the support are provided. In such methods of producing a composite block intended for the production of a dental prosthesis, a volume of liquid resin that is greater than the volume of the open pores of the support by at least 2% is caused to penetrate into the support and to cure therein, said volumes being measured at a temperature of 20° C. and at a pressure of 1 bar.

Abstract: A nonporous ceramic bracket for bonding to the external face of a tooth is made of compressed zirconium oxide particles which are partially stabilized by a transition metal oxide. The bracket has a color and translucency substantially corresponding to the tooth to which it is bonded.