From: Orthodontic treatment demand for fixed treatment and aligners among young adults in middle Europe and South America – a questionnaire study
Country
No
I don’t know
Yes
Chile
26 (3,9%)
170 (25,4%)
474 (70,7%)
Poland
46 (10,9%)
125 (29,6%)
251 (59,5%)
Sum
72 (6,6%)
295 (27,0%)
725 (66,4%)
Difference CL/PL
< 0.001
0.142