Progress in Orthodontics

Table 2 Comparison of tip values measured for the two groups

From: Three-dimensional assessment of teeth first-, second- and third-order position in Caucasian and African subjects with ideal occlusion

Africans—tip				Caucasians—tip			Comparison
	n	Mean	Standard deviation	n	Mean	Standard deviation	t test	p level
TIP U7	58	−3.06	6.78	60	−3.88	10.60	0.51	ns
TIP U6	58	9.48	3.53	60	10.26	5.54	−0.98	ns
TIP U5	58	5.96	5.84	60	9.64	4.16	−3.93	<0.001
TIP U4	58	3.29	4.45	60	7.67	4.28	−5.45	<0.001
TIP U3	58	8.23	5.20	60	9.96	4.81	−1.87	ns
TIP U2	58	9.23	3.87	60	9.99	3.69	−1.10	ns
TIP U1	58	3.68	3.55	60	4.53	2.84	−1.44	ns
TIP L7	58	12.65	5.83	60	14.20	6.47	−1.37	ns
TIP L6	58	6.30	5.36	60	10.99	2.78	−5.95	<0.001
TIP L5	58	3.60	4.02	60	6.90	3.09	−4.99	<0.001
TIP L4	58	2.95	3.89	60	6.06	3.36	−4.63	<0.001
TIP L3	58	3.478	4.850	60	5.91	3.98	−2.98	0.004
TIP L2	58	−0.26	3.01	60	0.14	4.46	−0.57	ns
TIP L1	58	−1.13	3.30	60	0.00	4.46	−1.57	ns

ns not significant.

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