Introduction: The diagnosis and treatment of invasive cervical resorption is always challenging. Usually such cases are asymptomatic and standard radiographs do not always provide all the information, meaning they can be confused with an internal resorption. Methods: The purpose of this report was to describe two cases of invasive cervical resorption that were treated with calcium silicate cement as an alternative to mineral trioxide aggregate (MTA). In the first case surgical debridement was performed maintaining pulp vitality, and calcium silicate cement was applied as part of the restoration with 3-year follow up. In the second case, cone beam computed tomography (CBCT) was used to detect the invasive cervical resorption followed by root canal treatment, curettage of the resorbed walls, restoration and an 18-month follow-up. Conclusion: The absence of symptoms, normal radiographic aspect and the normal appearance of the surrounding tissues demonstrated that the bioactive material is suitable for repairing extensive losses of root dentin structure. Schlagwörter: calcium silicate cement, external root resorption, invasive cervical resorption