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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