AC	alveolar crest
CBCT	cone-beam computed tomography
CEJ	cemento-enamel junction
CSS	cross-sectional study
CT	computed tomography
F	female
FOV	field of view
FP	Frankfurt plane
IZC	infrazygomatic crest
M	male
MBS	mandibular buccal shelf
OP	occlusal plane
TAD	temporary anchorage device = miniscrew
ZP	zygomatic process
5–6	region between maxillary second premolar and first molar
6D	distobuccal root of first maxillary molar
6IR	middle of the buccal furcation of the maxillary first molar (equal distances to mesial and distal buccal root)
6M	mesiobuccal root of maxillary first molar
6–7	region between maxillary first and second molar
7D	distobuccal root of maxillary second molar
7IR	middle of the buccal furcation of the maxillary second molar (equal distances to mesial and distal buccal root)
7M	mesiobuccal root of second maxillary molar