Comparison of Activator-Headgear and Twin Block Treatment Approaches in Class II Division 1 Malocclusion

Table 4

Mean values of the investigated variables in the untreated, control group at the same pretreatment (T1) and posttreatment (T2) age as the treated groups.

	T1	T2
	Mean ± SD	Mean ± SD
NSBa	130.9 ± 4.2	130.7 ± 4.7	0.514	0.093
SNA	82.1 ± 2.4	82.4 ± 2.5	0.174	0.193
SNB	75.8 ± 2.8	76.3 ± 2.6	0.005	0.384
ANB	6.3 ± 2.0	6.0 ± 1.9	0.204	0.181
A-NPg	5.2 ± 2.0	5.1 ± 2.1	0.479	0.101
NL/NSL	6.6 ± 3.3	6.7 ± 3.5	0.772	0.042
MP/NSL	35.0 ± 4.8	34.9 ± 5.0	0.625	0.070
MP/NL	28.4 ± 5.0	28.2 ± 5.3	0.526	0.091
FA/NBa	87.9 ± 4.3	88.2 ± 4.2	0.304	0.147
UFH	46.3 ± 3.1	47.6 ± 3.4	<0.001	0.581
LFH	56.5 ± 5.2	57.9 ± 6.0	0.001	0.463
UFH/LFH	82.3 ± 6.6	82.8 ± 7.3	0.535	0.089
Co-A	81.3 ± 4.9	82.7 ± 5.3	<0.001	0.512
Co-Gn	99.8 ± 5.9	102.4 ± 6.4	<0.001	0.761
Max Mand diff	18.5 ± 3.2	19.7 ± 4.0	0.001	0.461
−1/MP	97.8 ± 5.5	96.9 ± 5.5	0.105	0.230
+1/NSL	102.7 ± 7.2	103.1 ± 7.2	0.487	0.100
−1/A-Pg angle	22.7 ± 5.1	22.5 ± 5.2	0.708	0.054
+1/A-Pg angle	32.8 ± 6.7	32.4 ± 6.8	0.345	0.135
−1/A-Pg distance	1.3 ± 2.3	1.2 ± 2.4	0.749	0.046
+1/A-Pg distance	6.9 ± 2.2	7.1 ± 2.7	0.144	0.207
Gl′-Sn-Pg′	16.4 ± 4.4	16.8 ± 4.3	0.258	0.161
Cm-Sn-Ls	110.0 ± 13.9	112.9 ± 9.6	0.037	0.293
Li-E	1.4 ± 2.2	1.1 ± 2.3	0.270	0.157
Ls-E	0.4 ± 2.2	−0.1 ± 2.1	0.017	0.334
Li-S	2.3 ± 2.2	2.2 ± 2.3	0.783	0.039
Ls-S	2.1 ± 2.0	2.0 ± 2.2	0.829	0.031
OJ	5.6 ± 2.1	5.9 ± 2.2	0.068	0.258

Paired samples -test.
Effect size.