Table 4 Number and percentage of the lower teeth presenting rRCR = 100% (no RR), rRCR between 90 and 100 (slight RR), rRCR between 80 and 90 (moderate RR), and rRCR = 80 (severe RR)
From: Root resorption during orthodontic treatment with Invisalign®: a radiometric study
RCR % | 4.3 | 4.2 | 4.1 | 3.1 | 3.2 | 3.3 |
|---|---|---|---|---|---|---|
No. of teeth | 50 | 38 | 39 | 46 | 37 | 45 |
≥100 | 70.42% | 53.52% | 55.71% | 65.71% | 54.41% | 63.38% |
No. of teeth | 15 | 17 | 12 | 17 | 25 | 19 |
90 ≤ x < 100 | 21.13% | 23.94% | 17.14% | 24.28% | 36.76% | 26.76% |
No. of teeth | 6 | 10 | 13 | 7 | 5 | 6 |
80 ≤ x < 90 | 8.45% | 14.08% | 18.57% | 10.00% | 7.35% | 8.45% |
No. of teeth | 0 | 6 | 6 | 0 | 1 | 1 |
<80 | 0.00% | 8.45% | 8.57% | 0.00% | 1.47% | 1.41% |
TOT no. of teeth | 71 | 71 | 70 | 70 | 68 | 71 |
% | 100% | 100% | 100% | 100% | 100% | 100% |