Table 12 Answers of the participants about previous type, if any, of orthodontic treatment
Country/Answer | A. Removable acrylic appliance | B. Metal fixed appliance | C. Esthetic fixed appliance | D. Aligners | E.I have not been treated |
|---|---|---|---|---|---|
Chile | 196 (29,2%) | 426 (63,6%) | 45 (6,7%) | 99 (14,8%) | 168 (25,0%) |
Poland | 136 (32,2%) | 134 (31,8%) | 17 (4,0%) | 32 (7,6%) | 181 (42,9%) |
Total | 332 (30,4%) | 560 (51,2%) | 62 (5,7%) | 131 (12,0%) | 349 (32,0%) |
Difference CL/PL | 0.331 | < 0.001 | 0.083 | < 0.001 | < 0.001 |