Louise Hauge Matzen

Coronectomy of mandibular third molars: a clinical and radiological study of 231 cases with a mean follow-up period of 5.7 years

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review


  • Mads Hagen Pedersen
  • ,
  • J Bak
  • ,
  • L H Matzen
  • J Hartlev
  • J Bindslev
  • ,
  • S Schou, Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Copenhagen, Copenhagen, Denmark.
  • ,
  • S E Nørholt

Coronectomy is a widely accepted treatment for mandibular third molars that are in close relationship to the mandibular canal. However, long-term studies on morbidity following this procedure have not been presented. The aim of this study was to examine the long-term morbidity after coronectomy, with sensory disturbances of the inferior alveolar nerve (IAN) and root migration as the primary outcome variables. A total of 231 mandibular third molar coronectomies were performed in 191 patients with a mean follow-up period of 5.7years (range 1-12years). The prevalence of IAN injury was 1.3%, and 3.5% of the retained roots were removed. None of the reoperations to remove the retained roots caused IAN impairment. Infections occurred in 11.7% of the cases and all were treated with antibiotics. Overall, 97% of the retained roots showed signs of migration and 65% showed signs of rotation. Therefore, coronectomy of the mandibular third molars with an intimate relationship to the mandibular canal seems to be a safe treatment modality with a good long-term prognosis.

TidsskriftInternational Journal of Oral and Maxillofacial Surgery
Sider (fra-til)1596-1603
StatusUdgivet - dec. 2018

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