SAAD ABDULAZIZ NAZHAN2022-06-012022-06-011708https://drepo.sdl.edu.sa/handle/20.500.14154/57930en-USLIGHT AND ELECTRON MICROSCOPE STUDY OF THE MORPHOLOGICAL CHANGES IN L 929 CELLS AND HUMAN PERIODONTAL LIGAMENT FIBROBLASTS EXPOSED TO A TOXIC DENTAL MATERIAL .Thesis