Influence of maxillary molar distalization with clear aligners on three-dimensional direction: molar distal movement, intrusion, distal tip and crown buccal torque

Progress in Orthodontics

Table 4 Differences between maxillary molar deviational movements with and without attachments

	Tooth	Attachment	No attachment	P
	Tooth	Mean ± SD	Mean ± SD	P
Distal movement	Maxillary first molar (mm)	− 0.70 ± 0.70	− 1.34 ± 0.69	0.011
Distal movement	Maxillary second molar (mm)	− 1.37 ± 0.97	− 1.14 ± 0.86	0.416
Intrusion	Maxillary first molar (mm)	0.30 ± 0.60	0.25 ± 0.69	0.810
Intrusion	Maxillary second molar (mm)	0.37 ± 0.87	0.60 ± 1.31	0.520
Distal tip	Maxillary first molar (°)	3.91 ± 4.38	3.49 ± 5.56	0.795
Distal tip	Maxillary second molar (°)	7.04 ± 5.29	6.63 ± 6.59	0.732
Crown buccal torque	Maxillary first molar (°)	3.23 ± 5.91	2.85 ± 2.59	0.827
Crown buccal torque	Maxillary second molar (°)	2.18 ± 6.39	7.10 ± 6.56	0.020