additional_studies_date:
May 2008
| Frequency | Percent | |
| Patients prefer / Don't want | 20 | 46.5% |
| Simple cases | 7 | 16.3% |
| East | 7 | 16.3% |
| Esthetics | 5 | 11.6% |
| Better oral hygiene | 5 | 11.6% |
| No need for ortho training | 3 | 7.0% |
| Less time required / Faster | 3 | 7.0% |
| Good results | 1 | 2.3% |
| Other | 6 | 14.0% |
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