Three-dimensional analysis of the relationship between mandibular retromolar space and positional traits of third molars in non-hyperdivergent adults

Table 5 Comparison of Measurements at Group1 and Group2, Group3 and Group4, Group5 and Group6^a

Measurements (the RS of level and angle)	sex(N)			Angle’s classification(N)			Age(N)
Measurements (the RS of level and angle)	Group1(208) Mean ± SD	Group2(204) Mean ± SD	P	Group3(332) Mean ± SD	Group4(90) Mean ± SD	P	Group5(216) Mean ± SD	Group6(196) Mean ± SD	P
L1	11.38 ± 2.30	11.22 ± 2.07	0.465	11.31 ± 2.21	11.27 ± 2.13	0.861	10.88 ± 2.26	11.36 ± 2.33	0.723
L2	10.81 ± 1.92	10.98 ± 1.49	0.314	10.93 ± 1.72	10.76 ± 1.70	0.410	10.61 ± 1.71	10.63 ± 1.93	0.322
L3	7.73 ± 1.88	7.13 ± 1.87	0.001	7.45 ± 1.89	7.37 ± 1.93	0.743	7.74 ± 1.77	7.95 ± 1.98	0.524
L4	6.02 ± 1.76	5.89 ± 1.92	0.490	5.95 ± 1.85	5.95 ± 1.82	0.980	6.21 ± 1.81	6.78 ± 1.83	0.058
L5	3.94 ± 1.82	4.26 ± 1.73	0.066	4.06 ± 1.78	4.23 ± 1.77	0.425	3.97 ± 1.87	4.85 ± 1.95	0.000
A angle	43.61 ± 31.78	45.06 ± 32.06	0.645	44.35 ± 31.37	44.31 ± 33.88	0.990	45.72 ± 32.04	48.06 ± 33.27	0.541
B angle	17.30 ± 13.49	18.39 ± 13.62	0.418	17.96 ± 14.37	17.45 ± 10.13	0.704	16.10 ± 14.30	21.75 ± 15.31	0.000

^aIndependent sample T-test of measured values under different genders, different Angle’s classification, and different ages
The significance level P < 0.05 was labeled bold

ISSN: 1472-6831