title: Healing of Horizontal Intra-alveolar Root Fractures after Endodontic Treatment with Mineral Trioxide Aggregate.
abstract: BACKGROUND
  The purpose of this retrospective study was to evaluate the healing type and assess the outcome of horizontal intra-alveolar root fractures after endodontic treatment with mineral trioxide aggregate (MTA) as filling material.
  
  
  METHODS
  The clinical database of the Department of Conservative Dentistry at Yonsei University Dental Hospital, Seoul, Korea, was searched for patients with histories of intra-alveolar root fractures and endodontic treatments with MTA between October 2005 and September 2014. Radiographic healing at the fracture line was evaluated independently by 2 examiners and was classified into 4 types according to Andreasen and Hjørting-Hansen.
  
  
  RESULTS
  Of the 22 root-fractured teeth that received endodontic treatment with MTA, 19 cases participated in the follow-up after a period of at least 3 months. Seventeen of the 19 teeth (89.5%) exhibited healing of the root fractures. For each healing type, 7 teeth (36.8%) showed healing with calcified tissue, 8 teeth (42.1%) showed interposition of connective tissue, 2 teeth (10.5%) showed interposition of connective tissue and bone, and 2 teeth (10.5%) showed interposition of granulation tissue without healing.
  
  
  CONCLUSIONS
  Within the limitations of this study, intra-alveolar root fractures showed satisfactory healing outcomes after endodontic treatment with MTA. MTA could be considered to be suitable filling material for the endodontic treatment of horizontal intra-alveolar root fractures.
authors.affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, Seoul, South Korea.
authors.forename: Dohyun
authors.initials: D
authors.lastname: Kim
authors.affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, Seoul, South Korea.
authors.forename: Wonyoung
authors.initials: W
authors.lastname: Yue
authors.affiliation: Department of Conservative Dentistry and Endodontics, National Health Insurance Service Ilsan Hospital, Goyang, South Korea.
authors.forename: Tai-Cheol
authors.initials: TC
authors.lastname: Yoon
authors.affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, Seoul, South Korea.
authors.forename: Sung-Ho
authors.initials: SH
authors.lastname: Park
authors.affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, Seoul, South Korea. Electronic address: andyendo@yuhs.ac.
authors.forename: Euiseong
authors.initials: E
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017607:Aluminum Compounds / Q000627:therapeutic use*; D017610:Calcium Compounds / Q000627:therapeutic use*; D002648:Child; D004338:Drug Combinations; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010087:Oxides / Q000627:therapeutic use*; D012189:Retrospective Studies; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012390:Root Canal Therapy / Q000009:adverse effects* / Q000379:methods; D017640:Silicates / Q000627:therapeutic use*; D014082:Tooth Fractures / Q000150:complications / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000473:pathology; D014092:Tooth Root / Q000187:drug effects* / Q000293:injuries*; D016896:Treatment Outcome; D014945:Wound Healing / Q000187:drug effects*; D055815:Young Adult
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate
keywords: Endodontic treatment; healing; horizontal root fracture; mineral trioxide aggregate