title: [One year evaluation of endodontic microsurgery in 54 cases with persistent apical periodontitis].
abstract: OBJECTIVE
  To evaluate the outcome of endodontic microsurgery in 54 cases with persistent apical periodontitis.
  
  
  METHODS
  All surgical procedures were performed under a dental operating microscope after root canal treatment. Surgical procedures included periapical curettage, root-end resection, retropreparation with ultrasonic microtips, and root-end filling with mineral trioxide aggregate (MTA). Healing was monitored clinically and radiographically.
  
  
  RESULTS
  One year later, 31 (57.41%) cases were cured, 19 (35.19%) cases were improved, 4 (7.41%) cases were failure. There were no statistical difference between sex, age, tooth location, size of the lesion and pathological features (P>0.05).
  
  
  CONCLUSIONS
  The outcome of the present study indicates that endodontic microsurgery may result in a predictable treatment outcome in teeth with persistent periradicular lesions.
authors.affiliation: International Clinic Center, Affiliated Stomatological Hospital of Nankai University, Stomatological Hospital of Tianjin, Tianjin 300041, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Shen
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhang
authors.forename: Shufeng
authors.initials: S
authors.lastname: Jin
authors.forename: Ningning
authors.initials: N
authors.lastname: Li
authors.forename: Jianrong
authors.initials: J
authors.lastname: Fan
mesh_terms: D017607:Aluminum Compounds; D001047:Apicoectomy; D017610:Calcium Compounds; D004338:Drug Combinations; D006801:Humans; D008866:Microsurgery; D010087:Oxides; D010485:Periapical Periodontitis; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation; D012390:Root Canal Therapy; D017640:Silicates; D016896:Treatment Outcome
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate