Clinical features of all-ceramic restorations in the oral cavity

BACKGROUND: Porcelain veneers make up the particular section of prosthetic dentistry. Veneers are necessary for frontal teeth restorations.
 AIM: To study the principles of dental preparation and the features of the formation of a natural anatomical contour on all-ceramic restorations.
 MATERIAL AND METHODS: To achieve a high-quality result of prosthetics with all-ceramic fixed prostheses, it is necessary to take into account many important aesthetic criteria: the shape of the tooth, the inclination of the axes of the teeth, the interdental space and the level of interdental contacts, the gum biotype, its color, the position of the gingival margin, the zenith of the gingival contour; tooth color (shades); the level of the cutting edge of the incisors; the relief of the teeth surface; the smile line and the position of the lower lip.
 To determine the color-optical characteristics of future prostheses, it is convenient to use the Vitapan 3-D Master Shade Guide color scale.
 For the manufacture of facings, it is necessary to take into account that the preparation is carried out within the enamel layer, the facings are made only for vital teeth, as clinically possi