Fitri, A. R., Limraksasin, P., Yendriwati, Dana, F. and Siregar, N. Y. (2024) “ The Application of Apple (Malus sylvestris) Extract-Based Gel: Effects on Teeth Colour Change and Hardness”, Dentika: Dental Journal, 27(1), pp. 6-12. doi: 10.32734/dentika.v27i1.15475.