Influence of Khat Extract on the Color Stability of Glazed and Polished Dental Ceramics: An In Vitro Comparative Study - Maged A Sakran; Mohsen AAl Hamzi; Khalid Aldhorae; Abdullmalik N Al-Hamati; Thanoon A Baggash; Mohammed MAl Moaleem (The Journal of Contemporary Dental Practice, 2026)