Table 2: The first 20 countries in terms of orthodontic research output, alongside alterations in their ranking and publication yield in 2011-2015 and 2016-2020.
| Rank | Country | Total | 2011-2015 | 2016-2020 | Trend change (%) | ||
|---|---|---|---|---|---|---|---|
| Rank | Articles | Rank | Articles | ||||
| 1 | United States | 1869 | 1 | 951 | 1 | 918 | -3 |
| 2 | Brazil | 1552 | 2 | 897 | 2 | 655 | -27 |
| 3 | South Korea | 705 | 3 | 363 | 3 | 342 | -6 |
| 4 | Italy | 624 | 4 | 316 | 4 | 308 | -3 |
| 5 | United Kingdom | 604 | 6 | 297 | 5 | 307 | 3 |
| 6 | Germany | 525 | 5 | 305 | 9 | 220 | -28 |
| 7 | Japan | 522 | 7 | 285 | 6 | 237 | -17 |
| 8 | Turkey | 486 | 8 | 257 | 7 | 229 | -11 |
| 9 | China | 386 | 10 | 164 | 8 | 222 | 35 |
| 10 | India | 365 | 9 | 180 | 10 | 185 | 3 |
| 11 | Switzerland | 323 | 11 | 139 | 11 | 184 | 32 |
| 12 | Canada | 304 | 12 | 132 | 12 | 172 | 30 |
| 13 | France | 200 | 13 | 102 | 18 | 98 | -4 |
| 14 | Greece | 198 | 14 | 88 | 15 | 110 | 25 |
| 15 | Australia | 191 | 16 | 73 | 13 | 118 | 62 |
| 16 | Iran | 178 | 18 | 63 | 14 | 115 | 83 |
| 17 | Egypt | 161 | 20 | 53 | 16 | 108 | 104 |
| 18 | Saudi Arabia | 161 | 19 | 56 | 17 | 105 | 88 |
| 19 | Sweden | 154 | 15 | 74 | 19 | 80 | 8 |
| 20 | Netherlands | 137 | 17 | 66 | 20 | 71 | 8 |