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Table 1 Variables and number of microimplants

From: Long-term evaluation of factors affecting removal torque of microimplants

Variables   Maxilla (n) Mandible (n)
Total 703 409 294
Placement site Anterior teeth 82 43
Posterior teeth 327 221
Retromolar 30
Sex Male 131 92
Female 278 202
Age  < 20 years 85 46
20–29 years 205 171
 ≥ 30 years 119 77
Length of microimplant 6 mm 21 168
7 mm 288 126
8 mm 85
Diameter of microimplant 1.3 mm 366 130
1.4 mm 20 126
1.5 mm 10 31
Placement method Self-drilling 352 129
Pre-drilling 57 165