30° 20° Overall mean Inner canal wall 76.2 ± 38.35 75.7 ± 44 76 75.9 ± 41.32 Outer canal wall 77.3 ± 31.67 87.2 ± 32.27 82.2 ± 32.09

Table 4: Mean changes (μm) across inner or outer walls by canal curvature.