Fig. 2

A-G Treatment process of tooth #28. (A) Preoperative radiograph. Tooth #28 showed periapical radiolucency. (B) Root canal filled with vitapex. (C) One week after using calcium hydroxide paste for root canal disinfection. The sinus tract has disappeared. (D) Radiograph after root canal filling. (E) Composite resin restoration. (F) 6-month follow-up. The lesion had almost healed. (G) 6-year follow-up. The situation was stable