From: Orthodontic treatment demand for fixed treatment and aligners among young adults in middle Europe and South America – a questionnaire study
Country
A. No
B. I don’t’ know
C. Yes
Chile
434 (64,8%)
0 (0%)
236 (35,2%)
Poland
359 (85,1%)
39 (9,2%)
24 (5,7%)
Total
793 (67,7%)
39 (3,6%)
260 (23,7%)
Difference CL/PL
< 0.001