Table 2.
Improvement of MHR/LHR and PHR/AHR ratios by lateral pillar group
| Roundness component and pillar group | Mean ratio | |||
|---|---|---|---|---|
| Before VFO (range) | Latest followup (range) | Improvement | p* | |
| MHR/LHR AP plane (n = 25) |
||||
| Pillar B (n = 7) | 0.76 (0.63–0.97) | 0.88 (0.71–0.97) | 0.12 | 0.016 |
| Pillar C (n = 18) | 0.59 (0.32–1.1) | 0.78 (0.48–0.97) | 0.19 | 0.009 |
| PHR/AHR Lateral plane (n = 14) |
||||
| Pillar B (n = 2) | 0.68 (0.51–0.85) | 0.79 (0.55–0.85) | 0.11 | 0.655 |
| Pillar C (n = 12) | 0.57 (0.37–0.68) | 0.73 (0.42–0.76) | 0.16 | 0.016 |
MHR = medial head roundness; LHR = lateral head roundness; PHR = posterior head roundness; AHR = anterior head roundness; * Wilcoxon signed-rank test.