Invasive cervical resorption is a type of external resorption, which is generally located in the cervical region of the tooth. The resorptive process can be caused by physiological, pathological, hormonal, and trauma factors. The present study aimed to report a case of invasive cervical resorption in tooth 12 identified as an incidental finding, in which all available clinical resources were used, as well as a combined multidisciplinary treatment of endodontics, orthodontics, surgery, and prosthesis. At the initial consultation, the tooth presented with Heithersay’s class II resorption, undergoing endodontic treatment and traction for subsequent cavity sealing. After completion of orthodontics, an increase in the resorptive pocket was observed (Class III of Heithersay), which led to endodontic retreatment and subsequent surgical intervention to remove the granulation tissue and fill it with bioceramic material. The preparation of the coronal remnant and fabrication of a prosthetic restoration were performed, with the aim of shielding the endodontic cavity and functionally restoring the tooth. With the case presented, it was possible to conclude that incidental findings are part of the endodontist’s daily life, requiring a constant search both for early diagnosis and effective multidisciplinary treatment, which contributes to the restoration of aesthetics and function, contributing to the tooth longevity.