Effect of miniscrew insertion angle in the maxillary buccal plate on its clinical survival: a randomized clinical trial

Progress in Orthodontics

Table 1 Comparison of the PTV of 45° and 90° miniscrews over time

Time	90°		45°		95% confidence interval		P-value^†
	Mean	SD	Mean	SD	95% confidence interval
	Mean	SD	Mean	SD	Lower	Upper
At 1 month	4.07^a	7.76	3.72^a	9.19	−4.28	4.71	0.923
At 2 months	4.64^a	7.94	4.64^a	9.76	−4.82	4.42	0.929
At 3 months	5.66^a	6.96	4.04^a	7.85	−2.63	5.56	0.466
At 4 months	5.20^a	6.25	4.07^a	5.89	−1.29	2.90	0.432
At 5 months	4.71^a	6.83	3.68^a	5.66	−2.67	4.13	0.656
At 6 months	2.95^a	5.06	6.01^a	5.13	−8.12	1.40	0.150
P-value^‡	0.104		0.160

^†Paired t-test
^‡Repeated measures ANOVA followed by LSD test
Means with the same superscript letters are not significantly different (P > 0.05)