TY JOUR TI THE EFFECT OF INTRACORONAL BLEACHING ON THE MICROHARDNESS OF DENTIN: A CLINICAL CASE WITH A LITERATURE REVIEW KW internal bleaching KW dentine microhardness KW vertical root fracture KW biomechanical properties of dentin KW endodontic sealer JO Actual problems in dentistry AU Tantun, Y.A. AU Makeeva, M.K. AU Sharganova, V.D. AU Najafidelshad, S.. AU Korzun, A.L. AU Martynova, S.V. AU Karnaeva, A.S. PY 2024 IS 20 PB TIRAZH Publishing House