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Radiolucent lines (RL) in zones 2, 3 and 4 (appearance independent from location)
| Group | No RL | RL in one zone | RL in two zones | RL in all zones |
|---|---|---|---|---|
| Group A (pulsed lavage) | 37 (66%) | 13 (23%) | 4 (7%) | 2 (4%) |
| Group B (syringe lavage) | 22 (39%) | 13 (23%) | 9 (16%) | 12 (22%) |
