Intentional reimplantation (IR) is an intentional extraction of tooth followed by reinsertion into its own alveolus. In this case report endodontically failed tooth with large periapical radiolucency was choosen for intentional reimplantation in mandibular second molar. After 6 month follows up the patient was asymptomatic and radiographically no evidence of root resorption was seen. The indications for and limitations of intentional reimplantation are discussed in the case report.