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http://dx.doi.org/10.3340/jkns.2015.58.4.341

The Effect of the Pedicle-Facet Angle on Degenerative Cervical Spondylolisthesis  

Kim, Hyung Cheol (Department of Neurosurgery, Hallym University Sacred Heart Hospital)
Jun, Hyo Sub (Department of Neurosurgery, Hallym University Sacred Heart Hospital)
Kim, Ji Hee (Department of Neurosurgery, Hallym University Sacred Heart Hospital)
Chang, In Bok (Department of Neurosurgery, Hallym University Sacred Heart Hospital)
Song, Joon Ho (Department of Neurosurgery, Hallym University Sacred Heart Hospital)
Oh, Jae Keun (Department of Neurosurgery, Hallym University Sacred Heart Hospital)
Publication Information
Journal of Korean Neurosurgical Society / v.58, no.4, 2015 , pp. 341-345 More about this Journal
Abstract
Objective : To measure the orientation of the facet joints of cervical spine (C-spine) segments in the sagittal plane, known as the pedicle-facet (P-F) angle, and to use these measurements to evaluate the relationship between the P-F angle and the amount of vertebral anterolisthesis in patients with degenerative cervical spondylolisthesis (DCS). Methods : A retrospective case-control study was performed including 30 age- and sex-matched patients with DCS and 30 control participants. Anterior-posterior and lateral view radiographs of the C-spine were obtained in a standing position. The P-F angle at all cervical levels and the amount of anterolisthesis at C4-5 were measured from lateral view plain radiographs. Results : The P-F angles at C4-5 were $141.14{\pm}7.14^{\circ}$ for the DCS group and $130.53{\pm}13.50^{\circ}$ (p=0.012) for the control group, and at C5-6 were $137.46{\pm}8.53^{\circ}$ for the DCS group and $128.53{\pm}16.01^{\circ}$ for the control group (p=0.001). The mean P-F angle at C4-5 did not correlate with the amount of anterolisthesis (p=0.483). The amount of anterior slippage did correlate with age (p<0.001). Conclusion : The P-F angle was intrinsically higher at C4-5, compared to C5-6, in both the DCS and control groups, which might explain the increased likelihood for anterolisthesis of C4. Higher P-F angles in the DCS group may be a predisposing factor to slippage. The P-F angle may interact with age to increase incidence of anterolisthesis with increasing age.
Keywords
Pedicle facet angle; Facet joints; Degenerative cervical spondylolisthesis; Cervical spine; Facet orientation;
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