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Distribution of the root length reduction during orthodontic treatment: post-treatment RCR relative to pre-treatment RCR (rRCR), absolute (n) and relative (%) frequencies (n = 1600): rRCR < 80 means a reduction over 20% of pre-treatment root length
|
rRCR |
Frequency |
Percent |
|---|---|---|
| (n) | (%) | |
| rRCR < 80 |
101 |
6.31 |
| 80 ≤ rRCR < 90 |
191 |
11.94 |
| 90 ≤ rRCR < 100 |
444 |
27.75 |
| rRCR ≥ 100 | 864 | 54.00 |
