From: Orthodontic treatment demand for fixed treatment and aligners among young adults in middle Europe and South America – a questionnaire study
Country/Gender
Female
Male
Other
Chile
448 (66,9%)
222 (30,1%)
0 (0%)
Poland
247 (58,3%)
171 (40,5%)
4 (1,2%)
Total
695
389
4
Difference CL/PL
0.004
0.011
0.045