Alhijazi AY, Khashman BM, Abdul Ghani B, Isaa E. Localization of transforming growth factor-beta expression in the peri-implant tissues of dental implants coated with placental collagen. J Bagh Coll Dent. 2013;25(2):66-69. Accessed April 28, 2024. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/230