title: Assessment of difficulty in third molar surgery--a systematic review.
abstract: OBJECTIVE
  The aim of this review was to identify the most important variables that determine surgical difficulty of impacted third molar extractions by their consistent showing in previous studies.
  
  
  METHODS
  Electronic library search for current evidence in the world literature was conducted, and relevant articles were selected, scrutinized, and the findings were compared.
  
  
  RESULTS
  Seven articles were most relevant, and the results of the comparison of the selected articles showed that demographic variable, age; operative variables: surgeon procedure type and number of teeth extracted; and ratiographic variable, depth angulation; and root morphology, are the most consistent determinants of difficulty.
  
  
  CONCLUSIONS
  Current evidence is in support of 3 categoreis of variables strongly associated with surgical diffulty of impacted third molars. The most important variables in each of these categories have been identified.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University of Port-Harcourt, Port-Harcourt, Rivers State, Nigeria. oaakadiri@yahoo.com
authors.forename: Oladimeji A
authors.initials: OA
authors.lastname: Akadiri
authors.forename: Ambrose E
authors.initials: AE
authors.lastname: Obiechina
mesh_terms: D000367:Age Factors; D006801:Humans; D008334:Mandible / Q000000981:diagnostic imaging / Q000601:surgery; D008964:Molar, Third / Q000000981:diagnostic imaging / Q000601:surgery*; D011446:Prospective Studies; D011859:Radiography; D012307:Risk Factors; D014081:Tooth Extraction / Q000379:methods* / Q000706:statistics & numerical data; D014092:Tooth Root / Q000000981:diagnostic imaging; D014095:Tooth, Impacted / Q000000981:diagnostic imaging / Q000601:surgery*