Abstract: An autopolymerizing two-component prosthetic base material consisting of A) a liquid monomer component, B) a powdered filler-containing component containing at least one bead polymer modified by an elastic phase, which yields after curing a high-impact prosthetic plastic having a fracture toughness of ?2 MPa·m1/2 and a fracture work of ?900 J/m2.

Abstract: Agglomerated inorganic glass fillers for dental materials comprising 0.5 to 50 ?m large agglomerates of inorganic glass particles having a particle size of 200 to 7,000 nm that are fused at their boundary surfaces with at least one adjacent particle, are particularly suitable for dental materials with good polishability, lasting shine and good abrasion-resistance.

Abstract: Dental materials containing an aqueous and/or organic solvent or dispersion with nanoparticles dispersed in it that have an average particle size of 1 to <10 nm and are not agglomerated are particularly suitable for use as filling composites, fastening cement, prostheses base materials, crown veneer composites and bridge veneer composites or adhesives. Preferably the dental materials in accordance with the invention contain SiO2 and/or ZrO2 and/or Al2O3 and/or TiO2 nanoparticles.

Abstract: A flowable, light-curing underfilling material that is easily visible and distinguishable from the tooth substance. The underfilling material contains at least one polymerizable monomer, at least one polymerization initiator and also 0.3-10% white pigment.

Abstract: A method for color correction of replacement teeth or tooth surfaces by application of light-hardening corrective colors for the basic tooth colors is carried out with a color kit comprising: 1 corrective color for the Vita shades A, 1 corrective color for the Vita shades B, 1 corrective color for the Vita shades C, 1 corrective color for the Vita shades D, 1 orange corrective color for individualizing the Vita shades in the red/yellow color range, 1 blue corrective color for individualizing the Vita shades in the blue/green color range, 1 white corrective color for individualizing the Vita shades with respect to brightness and transparency, 1 transparent thinning enamel for adjusting the color intensity and optionally 1 black corrective color to individualize the Vita shades with respect to brightness 1 shade guide with mixing instructions and explanations of correction options, necessary tools like mixing plate, measuring pipette and brush.

Abstract: A photocurable dental coating material comprises

Abstract: The invention relates to a new process for the preparation of optically active amino acids and amino acid derivatives of the general formula (I), wherein *, X and R.sup.1 to R.sup.4 have the meaning given in the description. Starting from commercially obtainable (-)-menthol or (+)-menthol, the enantiomerically pure compounds of the formula (I) are obtained in high yields. The method is particularly suitable for the preparation of sterically demanding amino acids and amino acid derivatives.