Rania M. Khashaba 2022. Calcium Phosphate based Perforation Repair Materials using Human Gingival Fibroblasts: An in vitro Cytotoxicity Evaluation. New Horizons in Medicine and Medical Research Vol. 9. (May 2022), 83–91. DOI:https://doi.org/10.9734/bpi/nhmmr/v9/15713D.