The effect of micro-osteoperforations on the rate of maxillary incisors' retraction in orthodontic space closure: a randomized controlled clinical trial

Progress in Orthodontics

Table 5 Incisors’ length

Groups	Central incisors	Initial	Final	Mean of differences (Final—Initial)	P value*
CG	UR1	23.87 ± 2.19	23.12 ± 2.22	− 0.77 ± 0.38	< 0.05
	UL1	23.77 ± 2.05	23.01 ± 1.92	− 0.76 ± 0.54	< 0.05
MOPG	UR1	23.16 ± 1.14	22.29 ± 1.32	− 0.87 ± 0.48	< 0.05
	UL1	22.76 ± 1.57	21.98 ± 1.99	− 0.78 ± 0.93	< 0.05
				ns	P value**

Values in millimeters. *Paired t test p value, intragroups comparison; **Independent T test P value, intergroups comparison; ns, non-significant (P ≥ 0.05)