Efficacy of invisible advancement correction for mandibular retraction in adolescents based on Pancherz analysis

Table 2 Cephalometric analysis and comparison of changes and calculated measurement items after mandibular advancement treatment

Measurement	Pre-treatment T0	Post treatment T1	Difference T1-T0	T value	P value
ss/OLP (mm)	71.42 ± 3.76	72.02 ± 4.05	0.60 ± 0.82	-0.532	0.258
Pg/OLP (mm)	72.55 ± 3.25	75.68 ± 4.53	3.13 ± 0.89	-1.561	0.029a
Co-OLP (mm)	-8.57 ± 0.65	-9.60 ± 0.45	-1.03 ± 0.79	-1.349	0.000c
Pg/OLP + Co/OLP (mm)	82.01 ± 1.57	86.25 ± 2.05	4.14 ± 2.18	-1.687	0.000c
Co-Go (mm)	50.03 ± 4.15	54.12 ± 3.65	4.09 ± 1.58	-3.037	0.018a
Go-Pg (mm)	76.18 ± 5.43	80.43 ± 3.90	4.25 ± 2.87	-4.581	0.001b
Co-Pg (mm)	108.58 ± 7.08	113.60 ± 6.58	5.02 ± 1.83	-3.803	0.038a
SNA (°)	80.95 ± 1.90	80.67 ± 1.54	-0.28 ± 0.04	1.915	0.166
SNB (°)	74.89 ± 1.78	76.85 ± 1.65	1.96 ± 2.56	3.218	0.000c
ANB (°)	6.11 ± 1.06	4.08 ± 1.34	-2.03 ± 1.32	18.370	0.000c
Wits (mm)	6.41 ± 2.45	3.51 ± 1.18	-2.90 ± 1.72	7.138	0.000c
SN-MP (°)	31.20 ± 3.62	32.85 ± 3.51	1.65 ± 1.37	-1.478	0.043a
S-Go/N-Me	64.12 ± 2.68	62.08 ± 3.09	-2.04 ± 1.68	1.386	0.035a
ANS-Me/N-Me	54.40 ± 1.89	55.85 ± 2.18	1.45 ± 1.37	-2.087	0.045a
is/OLP	77.98 ± 6.07	76.65 ± 5.71	-1.33 ± 3.08	1.657	0.353
ii/OLP	71.11 ± 5.04	74.09 ± 4.76	2.98 ± 1.08	-1.709	0.071
ms/OLP	46.86 ± 5.34	45.67 ± 4.87	-1.19 ± 0.39	1.687	0.205
mi/OLP	45.30 ± 3.28	47.80 ± 5.18	2.50 ± 1.04	-1.560	0.082
U1-NA	28.89 ± 7.51	25.45 ± 5.40	-3.44 ± 6.89	-7.760	0.010a
U1-SN	108.04 ± 3.01	103.98 ± 4.78	-4.06 ± 4.88	4.673	0.000c
L1-MP	95.20 ± 2.93	96.43 ± 2.86	1.23 ± 0.40	-0.318	0.000c
L1-NB	22.78 ± 4.08	25.40 ± 3.32	2.62 ± 1.63	-3.341	0.030a
is/OLP-ii/OLP	6.87 ± 1.51	2.56 ± 0.76	-4.31 ± 1.43	16.30	0.000c
ms/OLP-mi/OLP	2.13 ± 1.20	-1.74 ± 1.31	-3.87 ± 0.78	10.61	0.000c
is/OLP-ss/OLP	7.04 ± 1.07	6.48 ± 2.09	-0.61 ± 1.71	4.25	0.089
ii/OLP-pg/OLP	-1.12 ± 1.65	0.05 ± 1.70	1.17 ± 0.83	1.75	0.005b
ms/OLP-ss/OLP	-23.18 ± 2.69	-24.34 ± 1.98	-1.16 ± 1.78	-15.68	0.000c
mi/OLP-pg/OLP	-26.98 ± 2.45	-26.80 ± 2.78	0.18 ± 1.57	3.05	0.185

^aP < 0.05.

^bP < 0.01.

^cP < 0.001.

Co: Condylion; OLP: Occlusal line perpendicular; Pg: Pogonion; Go: Gonion; ss: Subspinale; MP: MP plane, the line connecting the gonion point and gnathion point; SNA: The angle between SN and NA; SNB: The angle between SN and NB; ANB: The angle between NA and NB; SN-MP: The angle between SN and MP.