title: The relationship of facet tropism to lumbar disc herniation.
abstract: BACKGROUND
  The association between the facet tropism and the development of lumbar disc herniation has been studied; however the results remain controversial.
  
  
  OBJECTIVE
  To determine the association between the facet tropism and the development of lumbar disc herniation.
  
  
  METHODS
  A cross-sectional study.
  
  
  METHODS
  MRI of 34 patients with lumbar disc herniation was evaluated. Two orthopedic surgeons measured facet joint angle and determined the degenerative status of L3-4, L4-5, and L5-SI. Facet tropism was defined as the difference between the angle of the right and left facet more than 5 degrees.
  
  
  RESULTS
  The average difference of facet joint angle of HNP group was higher than normal group in the same level. There was no statistically significant correlation between the facet tropism and lumbar disc herniation.
  
  
  CONCLUSIONS
  These results do not indicate any relationship between the facet tropism and lumbar disc herniation.
authors: Center of Excellence in Orthopedics, Lerdsin Hospital, Bangkok, Thailand.
authors: Sombat
authors: S
authors: Kunakornsawat
authors: Kitipod
authors: K
authors: Ngamlamaidt
authors: Rachata
authors: R
authors: Tungsiripat
authors: Thavat
authors: T
authors: Prasartritha
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000175:diagnosis* / Q000503:physiopathology; D008159:Lumbar Vertebrae / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013785:Thailand; D018523:Tropism; D021801:Zygapophyseal Joint / Q000473:pathology*