Potential of Red Dragon Fruit Peel Extract (Hylocereus polyrhizus) as a Natural Irrigant for Root Canal Smear Layer Removal: A Narrative Review Shanaz Zahra Wibowo1, Athallah Achmad Zaki1, Yuliati2, Indah Listiana Kriswandini2, Indeswati Diyatri2, Muhammad Luthfi2, Anis Irmawati2 Abstract Smear layer is a layer of organic and inorganic debris that