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Table 1 Characteristics of included randomized clinical trials (N = 84)
| N | % | |
|---|---|---|
| Journal title | ||
| American Journal of Dentofacial Orthopedics (AJO-DO) | 20 | 23.8 |
| Angle Orthodontist (AO) | 9 | 10.7 |
| Australian Orthodontic Journal (AOJ) | 2 | 2.4 |
| Brazilian Oral Research (BOR) | 1 | 1.2 |
| Clinical Oral Investigations (CIO) | 2 | 2.4 |
| European Journal of Orthodontics (EJO) | 12 | 14.3 |
| European Journal of Oral Sciences (EJOS) | 1 | 1.2 |
| European Journal of Paedatric Dentistry (EJPD) | 1 | 1.2 |
| Journal of American Dental Association (JADA) | 1 | 1.2 |
| The Journal of Contemporary Dental Practice (JCDP) | 1 | 1.2 |
| Journal of Cranio-Maxillo Facial Surgery (JCMFS) | 1 | 1.2 |
| Journal of Clinical Periodontology | 1 | 1.2 |
| The Journal of Clinical Pediatric Dentistry | 1 | 1.2 |
| Journal of Dental Research | 4 | 4.8 |
| Journal of Orthodontics | 9 | 10.6 |
| Journal of Oral and maxillofacial Surgery | 2 | 2.4 |
| Journal of Orofacial Orthopedics | 1 | 1.2 |
| Lasers in Medical Science | 2 | 2.4 |
| Orthodontics and Craniofacial Research | 5 | 5.9 |
| Pediatric Dentistry | 1 | 1.2 |
| Progress in Orthodontics | 5 | 5.9 |
| PLoS ONE | 1 | 1.2 |
| Photomedicine and Laser Surgery | 1 | 1.2 |
| Continent | ||
| Europe | 41 | 48.8 |
| America | 15 | 17.9 |
| Non-European or American | 28 | 33.3 |
| Number of authors | ||
| 1–3 | 26 | 30.95 |
| 4–6 | 41 | 48.80 |
| >7 | 17 | 20.25 |
