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
256 (38,2%)
181 (27,0%)
233 (34,8%)
Poland
165 (39,1%)
93 (22,0%)
164 (38,9%)
Total
421 (38,6%)
274 (25,1%)
397 (36,4%)
Difference CL/PL
0.818
0.076
0.193