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Table 1 The demographic characteristics of the orthodontists

From: Recommendations for clear aligner therapy using digital or plaster study casts

Group of practitioners

1

2

Same format of models

Different formats of models

Gender

 Male

6

4

 Female

2

4

Years in practice

 Average

22.8

27.6

 < 10

2

1

 11~20

1

1

 21~30

2

3

 > 30

3

3