A restorable zirconium dioxide-based one piece implant (10) includes an implant root (11) made of zirconium dioxide and having a bottom coarse thread portion (111) for mounting in the gum of a patient and a top fine thread portion (112) at the top side of the bottom coarse thread portion (111), an abutment (12) formed integral with the top end of the top fine thread portion (112) of the implant root (11) for the mounting of a crown (30), and a vertical center hole (13) extending vertically downwardly from the topmost edge of the abutment (12) into the implant root toward the bottom end of the bottom coarse thread portion (111) of the implant root (11) and having a length greater than 2/3 of the combined length of the implant root (11) and the abutment (12), such that when the abutment (12) breaks accidentally or after a long use, the vertical center hole (13) provides a space for the application of post and core technology to embed a post in the broken abutment (12) in restoring the abutment (12).
