title: Multivariate relationships among risk factors and hypoesthesia of the lower lip after extraction of the mandibular third molar.
abstract: OBJECTIVE
  In this study, we investigated the multivariate relationships among risk factors and hypoesthesia of the lower lip.
  
  
  METHODS
  Various risk factors of hypoesthesia of the lower lip after mandibular third molar extraction were investigated by univariate and multivariate analyses.
  
  
  RESULTS
  Applying the logistic regression model and forward stepwise algorithms, canal observed, remarkable hemorrhage, loss of the white line of the root, diversion of the canal, and close relationship of the roots to the inferior alveolar nerve were identified as significant variables.
  
  
  CONCLUSIONS
  Procedure-related factors during surgery, such as canal observed and remarkable hemorrhage, and radiographic signs, such as loss of the white line of the root, diversion of the canal, and close relationship of the roots to the inferior alveolar nerve, were high risk factors of hypoesthesia of lower lip after extraction.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kobe Steel Hospital, Kakogawa, Japan. hasetaku@med.kobe-u.ac.jp
authors.forename: Takumi
authors.initials: T
authors.lastname: Hasegawa
authors.forename: Shinshou
authors.initials: S
authors.lastname: Ri
authors.forename: Masahiro
authors.initials: M
authors.lastname: Umeda
authors.forename: Takahide
authors.initials: T
authors.lastname: Komori
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D020209:Cranial Nerve Injuries / Q000453:epidemiology*; D005260:Female; D006801:Humans; D006987:Hypesthesia / Q000453:epidemiology*; D015994:Incidence; D008046:Lip / Q000294:innervation; D008047:Lip Diseases / Q000453:epidemiology*; D016015:Logistic Models; D008297:Male; D008334:Mandible; D008875:Middle Aged; D008964:Molar, Third / Q000601:surgery*; D015999:Multivariate Analysis; D012307:Risk Factors; D014081:Tooth Extraction / Q000009:adverse effects*; D061221:Trigeminal Nerve Injuries; D055815:Young Adult