THE MICROMORPHOLOGICAL RESEARCH OF THE INTERNAL STRUCTURE OF CHAIRSIDE CAD/CAM MATERIALS BY THE METHOD OF SCANNING IMPULSE ACOUSTIC MICROSCOPY (SIAM) СтатьяGoryainova K.E., Morokov E.S., Retinskaja M.V., Rusanov F.S., Apresyan S.V., Lebedenko I.Y.Open Dentistry Journal. Том 12. 2018. С. 125-132