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Invasive cervical resorption is a relatively uncommon form of a chronic inflammatory process that results in loss of dentine and is usually initiated in the pulp space. It begins as a localised resorptive process that initiates in the area of the root beneath the epithelial attachment and the coronal part of the alveolar process. The lesion is mainly detected on radiographs and exhibits no external signs. The limitations of conventional radiography make Cone Beam Computed Tomography (CBCT) an effective and accurate method of diagnosing root resorptions. The tooth is normally asymptomatic, and the diagnosis is usually made based on a routine examination. Most authors refer to dental trauma, whitening agents, and orthodontic treatment as aetiologic factors. This disorder necessitates a thorough study of the pathologic process in order to determine the source and stop the resorptive phenomenon. The treatment should seek to completely remove the resorptive defect and rebuild it with an appropriate filling substance. Biodentine, a calcium silicate-based material, can be used to fill resorptive defects in the teeth. Furthermore, biodentine has some desirable additional properties over Mineral Trioxide Aggregate (MTA), such as improved antibacterial properties, bioactivity-inducing hard tissue formation, good handling, self-adhesion to dentine, and shorter setting time. Hence, this article presents a case report of external cervical resorption of the maxillary central incisor. Biodentine along with collagen membrane was used to fill the resorptive defect. One year radiographic follow-up showed stability of the resorption site. [ABSTRACT FROM AUTHOR]