Provided is a medical device including a porous portion and a dense portion, wherein an arithmetic average roughness of a surface of the porous portion is 2.0 μm or greater but 20 μm or less, and wherein an arithmetic average roughness of a surface of the dense portion is less than 2.0 μm.

The invention relates to the use of lithium silicate glass ceramics and glasses with caesium oxide content, which are suitable in particular for veneering oxide ceramic restorations and metal restorations.

Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.

An object of the present disclosure is to provide a dental composition that can exhibit sufficient curability even in a state where moisture is excessive as in the oral environment. The dental composition of the present disclosure contains component (a): monomer containing (meth)acrylamide group represented by formula (1): ##STR00001##
(In formula, R represents a hydrogen atom or a methyl group and Rs may be the same or different from each other. R2 is an alkyl group having 2 to 6 carbon atoms and R2s may be the same or different from each other.)

An object of the present disclosure is to provide a dental composition that can exhibit sufficient curability even in a state where moisture is excessive as in the oral environment. The dental composition of the present disclosure contains component (a): monomer containing (meth)acrylamide group represented by formula (1): ##STR00001##
(In formula, R represents a hydrogen atom or a methyl group and Rs may be the same or different from each other. R2 is an alkyl group having 2 to 6 carbon atoms and R2s may be the same or different from each other.)

A bioactive borate glass composition including, for example: 30 to 60% B.sub.2O.sub.3; 0.5 to 20% ZrO.sub.2; 3 to 30% Na.sub.2O; 0.1 to 15% K.sub.2O; 0.1 to 15% MgO; 5 to 30% CaO; and 1 to 5% P.sub.2O.sub.5 in mole percents based on 100 mol % of the total composition. Also disclosed is a method of making and method of using the compositions and the bioactive borate glass dentin treatment formulations.

A bioactive borate glass composition including, for example: 30 to 60% B.sub.2O.sub.3; 0.5 to 20% ZrO.sub.2; 3 to 30% Na.sub.2O; 0.1 to 15% K.sub.2O; 0.1 to 15% MgO; 5 to 30% CaO; and 1 to 5% P.sub.2O.sub.5 in mole percents based on 100 mol % of the total composition. Also disclosed is a method of making and method of using the compositions and the bioactive borate glass dentin treatment formulations.

The invention relates to glass ceramics and glasses with a europium content, containing the following components:

TABLE-US-00001 Component wt.-% SiO.sub.2 30.0 to 75.0 Al.sub.2O.sub.3 10.0 to 45.0 Europium, calculated as Eu.sub.2O.sub.3 0.05 to 5.0

and which are suitable in particular for the production of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth.

The invention relates to a method to derive a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that in the form body comprising lithium silicate glass or containing lithium silicate glass the lithium ions are replaced by alkali ions of greater diameter to generate a surface compressive stress. To this end the form body is covered with a melt containing an alkali metal for which an aliquoted quantity of salt containing the alkali metal is used.

The invention relates to a method to derive a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that in the form body comprising lithium silicate glass or containing lithium silicate glass the lithium ions are replaced by alkali ions of greater diameter to generate a surface compressive stress. To this end the form body is covered with a melt containing an alkali metal for which an aliquoted quantity of salt containing the alkali metal is used.