pISSN 2234-7518
eISSN 2005-372X

Table. 1.

Numbers of microimplants according to the variables

Variable Post-use
removal
group
(n = 399)
Post-retention
removal
group
(n = 169)
Sex
Male 137 55
Female 262 114
Age (yr)
< 20 89 25
20–29 200 105
≥ 30 110 39
Placement site
Maxilla 213 130
Mandible 186 39
Placement method (maxilla/mandible)
No-drilling 266 (178/88) 125 (116/9)
Pre-drilling 133 (35/98) 44 (14/30)
Microimplant length (maxilla/mandible)
6 mm 121 (11/110) 22 (5/17)
7 mm 219 (152/67) 110 (88/22)
8 mm 59 (50/9) 37 (37/-)
Microimplant diameter (maxilla/mandible)
1.3 mm 272 (178/94) 137 (127/10)
1.4 mm 88 (17/71) 24 (2/22)
1.5 mm 39 (18/21) 8 (1/7)
Korean J Orthod 2022;52:201~209 https://doi.org/10.4041/kjod21.217
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