Evaluation of the effect of adding a flexible acrylic resin to the lingual flanges of the mandibular complete denture upon the masticatory efficiency in edentulous patients Using Color–changeable Chewing Gum. مجلة الجامعة. 2021;4(1). Accessed June 6, 2026. https://journal.hama-univ.edu.sy/huj/article/view/536