The incidence and severity of open gingival embrasures in adults treated with clear aligners and fixed appliances: a retrospective cohort study

Table 2 Measurement of incisor overlap and rotation before treatment

Measurement (Mean ± SD)	Maxilla			Mandible
Measurement (Mean ± SD)	Clear aligners	Fixed appliances	P value	Clear aligners	Fixed appliances	P value
Right incisor rotation, degrees	8.66 ± 6.78	10.42 ± 11.29	0.184	10.36 ± 11.99	10.44 ± 9.03	0.960
Left incisor rotation, degrees	7.92 ± 7.10	8.00 ± 7.56	0.934	11.96 ± 12.87	9.63 ± 8.69	0.135
Transverse overlap, mm	0.11 ± 0.42	0.10 ± 0.20	0.907	0.10 ± 0.15	0.13 ± 0.21	0.213
Anterior–posterior overlap, mm	0.35 ± 0.40	0.37 ± 0.57	0.809	0.52 ± 0.63	0.39 ± 0.52	0.120

Independent t-tests were used to compare pretreatment variables between the clear aligner and fixed appliance group
SD Standard deviation

ISSN: 1746-160X