Progress in Orthodontics

Table 4 Statistically significant comparisons for the aligner gap measure (P< 0.05,P< 0.01,P< 0.001)

From: MicroCT X-ray comparison of aligner gap and thickness of six brands of aligners: an in-vitro study

Aligner gap
Tooth	Comparison	Estimate (μm)	SE (μm)	Df	Lower CL (μm)	Upper CL (μm)	Pvalue
Canine	F22-Nuvola	− 140.97	34.27	467	− 239.04	− 42.90	P < 0.001***
Incisor	Air Nivol-F22	140.30	34.27	467	42.24	238.37	P < 0.001***
	Arc Angel-F22	129.88	34.27	467	31.81	227.94	P < 0.001***
	F22-Nuvola	− 165.74	34.27	467	− 263.81	− 67.67	P < 0.001***
	Invisalign-Nuvola	− 119.92	36.35	467	− 223.94	− 15.90	P < 0.01**
First molar	Air Nivol-ALL IN	− 166.56	31.28	467	− 256.08	− 77.04	P < 0.001***
	Air Nivol–Arc Angel	− 465.44	31.28	467	− 554.96	− 375.92	P < 0.001***
	Air Nivol-F22	106.48	30.15	467	20.21	192.75	P < 0.01**
	ALL IN-Arc Angel	− 298.88	31.28	467	− 388.41	− 209.36	P < 0.001***
	ALL IN-F22	273.04	30.15	467	186.77	359.31	P < 0.001***
	ALL IN-Invisalign	159.62	30.15	467	73.35	245.88	P < 0.001***
	ALL IN-Nuvola	144.27	30.15	467	58.00	230.54	P < 0.001***
	Arc Angel-F22	571.92	30.15	467	485.66	658.19	P < 0.001***
	Arc Angel-Invisalign	458.50	30.15	467	372.23	544.77	P < 0.001***
	Arc Angel-Nuvola	443.15	30.15	467	356.89	529.42	P < 0.001***
	F22-Invisalign	− 113.42	28.96	467	− 196.30	− 30.54	P < 0.001***
	F22-Nuvola	− 128.77	28.96	467	− 211.65	− 45.89	P < 0.001***

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