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Table 3 Facet orientations according to cervical levels and genders

From: Relationship between facet tropism and facet joint degeneration in the sub-axial cervical spine

  T-angle (°) S-angle (°) C-angle (°)
  Right side Left side Right side Left side Right side Left side
Male
 C2-C3 57.99 ± 7.77 56.87 ± 8.48 73.42 ± 7.73¶ 73.71 ± 8.03¶ 39.38 ± 7.77¶ 40.23 ± 7.91¶
 C3-C4 57.17 ± 5.74 56.44 ± 6.09 84.05 ± 7.98 84.50 ± 8.09 34.79 ± 6.61 35.14 ± 6.67
 C4-C5 54.89 ± 6.49 54.7 ± 6.480 90.30 ± 7.88 89.94 ± 8.47 36.23 ± 7.01 36.64 ± 6.81
 C5-C6 57.10 ± 6.51 56.69 ± 6.32 91.65 ± 8.78 91.65 ± 7.50 34.40 ± 6.53 34.45 ± 6.08
 C6-C7 64.64 ± 6.66¶ 63.85 ± 6.16¶ 88.94 ± 8.08 89.85 ± 8.89 26.93 ± 6.46¶ 27.75 ± 6.55¶
Female
 C2-C3 54.73 ± 7.73* 54.72 ± 9.24 71.27 ± 6.32*¶ 72.20 ± 6.76¶ 41.19 ± 7.62¶ 40.43 ± 9.16¶
 C3-C4 56.21 ± 5.74 55.34 ± 6.60 84.28 ± 7.46 84.56 ± 7.20 35.61 ± 6.08 36.01 ± 6.49
 C4-C5 55.00 ± 6.81 55.48 ± 5.87 92.17 ± 8.86 91.51 ± 7.84 36.50 ± 6.96 35.68 ± 5.86
 C5-C6 55.95 ± 6.60 56.75 ± 5.74 93.45 ± 7.67¶ 92.87 ± 8.33¶ 35.27 ± 6.62 34.68 ± 6.09
 C6-C7 63.39 ± 6.48¶ 63.05 ± 7.31¶ 90.19 ± 7.30 89.38 ± 7.61 27.76 ± 6.42¶ 28.30 ± 7.37¶
  1. T-angle the inclination of facets with respect to the transverse plane, S-angle the inclination of facets with respect to the sagittal plane, C-angle the inclination of facets with respect to coronal plane
  2. * P < 0.05 compared to the males
  3. ·¶ P < 0.05 compared to other levels
  4. No significant difference was noted between right side and left side