The most frequent cystic lesions that affect the jaw are radicular cysts. They make up between 52% and 68% of all cysts that affect the human jaw, making them the most prevalent of all jaw cysts. They are typically asymptomatic, and regular radiologic examinations are used to diagnose them. Radicular cysts can be treated surgically, such as enucleation, marsupialization, or decompression, or conventionally nonsurgically with root canal therapy when the lesion is small. The effective surgical treatment of a sizable infected radicular cyst that was connected to a maxillary lateral incisor is described in this case report.