Patients with obsolete anterior tooth trauma often see a doctor because of dental stain or gingiva tumefaction and suppuration in clinical. In this case, a 28-year-old female patient took root canal therapy for repeated gingiva tumefaction and tooth stain in anterior teeth of left maxillary and giant foreign body at apex shown in X-ray photography. After removing the foreign body at apex by endodontic surgery, internal bleaching and resin repair were conducted. The therapy shows that the usage specification of hot gutta-percha should strictly follow the operational steps, while the necessity of X-ray photography after operation should be confirmed in clinical operation. In addition, internal bleaching and resin repair should be combined to obtain the success in clinical therapy.
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