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Table 1 Search strategies used in the study
| Database | Step | Keywords |
|---|---|---|
| MEDLINE | 1 | direct bonding |
| 2 | indirect bonding | |
| 3 | “Dental Bonding/methods”[Mesh] | |
| 4 | “Orthodontic Brackets”[Mesh] | |
| 5 | 1 or 2 or 3 | |
| 6 | 4 and 5 | |
| EMBASE | 1 | direct bonding.mp. |
| 2 | indirect bonding.mp. | |
| 3 | exp dental bonding/ | |
| 4 | exp orthodontic bracket/ | |
| 5 | 1 or 2 or 3 | |
| 6 | 4 and 5 | |
| CENTRAL | 1 | direct bonding: ti,ab,kw (Word variations have been searched) |
| 2 | indirect bonding: ti, ab, kw (Word variations have been searched) | |
| 3 | MeSH descriptor: [Dental Bonding] explode all trees | |
| 4 | MeSH descriptor: [Orthodontic Brackets] explode all trees | |
| 5 | #1 or #2 or #3 | |
| 6 | #4 and #5 | |
| Web of Science | 1 | TS = *direct* bond* |
| 2 | TS = orthodonti* | |
| 3 | TS = bracket* | |
| 4 | #1 AND #2 AND #3 |
