Abstract : This article reports 3 cases of molar tooth with a vertical incomplete fracture. The cases were a vital mandibular left first molar without dental treatment history, a non-vital maxillary left second molar without dental treatment history, and a non-vital mandibular left second molar with gold class Ⅰ inlay. For each case, the fractured tooth was prepared and covered with a temporary resin crown immediately after the fracture was detected. All teeth were restored with a gold crown after the endodontic treatment for the two non-vital cases. Careful observation is necessary for these cases because of the poor prognosis of incomplete fractured teeth.