FIELD: chemistry.SUBSTANCE: method for manufacturing a lithium silicate glass-ceramic comprising: a tetravalent metal oxide selected ZrO2, TiO2, CeO2, GeO2, SnO2 and mixtures thereof, of at least 12.1 wt % Li2O, from 0 to less than 0.1 wt %of La2O3, from 0 to less than 1.0 wt % of K2O and less than 2.0 wt % of Na2O, comprises the steps of: (a) the initial glass comprising the components of the glass-ceramic is subjected to a thermal treatment at a temperature of 480-520°C for 10-30 min to form a glass with embryos that are suitable for the formation of lithium disilicate crystals, and (b) glass with embryos is subjected to heat treatment at a temperature of 640-740°C for the formation of glass ceramics with lithium disilicate as the main crystalline phase, the duration of the second heat treatment in step (b) is 10-60 minutes. Lithium silicate glass ceramics obtained by the aforementioned method and using it as a material for tooth restoration, in particular for coating materials for restoration of teeth or for the manufacture of materials for restoration of teeth, is also proposed.EFFECT: preparation of glass ceramics containing lithium disilicate as the main crystalline phase, with short thermal treatments and at sufficiently low temperatures of the crystallization process, the formation of the resulting glass ceramics into the desired material for tooth restoration can be carried out by pressing or machining.21 cl, 1 tbl, 16 exГруппа изобретений относится к области производства литиево-силикатной стеклокерамики, способам получения и применения такой стеклокерамики. Способ изготовления литиево-силикатной стеклокерамики, включающей: оксид четырехвалентного металла, выбранный из ZrO2, TiO2, СеО2, GeO2, SnO2 и смесей таковых, по меньшей мере, 12,1 массовых % Li2O, от 0 до менее 0,1 массового % La2O3, от 0 до менее 1,0 массового % K2О и от 0 до менее 2,0 массовых % Na2O, содержит этапы, на которых: (a) исходное стекло, включающее компоненты стеклокерамики, подвергают
