A Comparative Analysis of Tooth Size Discrepancy between Male and Female Subjects Presenting with a Class I Malocclusion

Table 1

Comparison of the mean tooth size, the mean anterior, and overall Bolton’s ratio between male and female subjects by two-sample t-test.

Tooth	Male		Female		Mean; Difference	SE of Mean; Difference	95% Confidence Interval		value
	Mean	SD	Mean	SD			Lower	Upper
Maxillary
T16	10.7	0.6	10.3	0.5	0.4	0.08	0.25	0.56	<0.001
T15	7.3	0.4	7.0	0.4	0.2	0.06	0.10	0.32	<0.001
T14	7.7	0.4	7.5	0.4	0.2	0.06	0.10	0.34	<0.001
T13	8.4	0.5	8.0	0.5	0.4	0.07	0.26	0.53	<0.001
T12	7.3	0.5	7.2	0.6	0.2	0.08	0.00	0.30	0.05
T11	8.7	0.5	8.5	0.5	0.2	0.07	0.08	0.36	0.003
T21	8.7	0.5	8.5	0.5	0.2	0.07	0.03	0.31	0.02
T22	7.3	0.5	7.1	0.5	0.1	0.07	0.00	0.29	0.054
T23	8.3	0.5	7.9	0.5	0.3	0.06	0.22	0.47	<0.001
T24	7.8	0.4	7.5	0.4	0.2	0.06	0.10	0.34	<0.001
T25	7.2	0.4	7.0	0.4	0.2	0.06	0.09	0.32	<0.001
T26	10.7	0.5	10.3	0.5	0.4	0.08	0.25	0.56	<0.001
Mandibular
T36	11.4	0.5	11.0	0.6	0.4	0.08	0.25	0.55	<0.001
T35	7.5	0.5	7.3	0.5	0.2	0.07	0.08	0.36	0.002
T34	7.6	0.4	7.4	0.4	0.2	0.06	0.04	0.28	0.01
T33	7.2	0.4	6.9	0.4	0.3	0.06	0.21	0.44	<0.001
T32	6.1	0.4	6.0	0.4	0.1	0.05	-0.02	0.19	0.11
T31	5.5	0.4	5.4	0.4	0.1	0.05	-0.03	0.17	0.157
T41	5.5	0.4	5.4	0.4	0.1	0.05	-0.01	0.19	0.073
T42	6.1	0.4	6.0	0.4	0.1	0.05	0.02	0.22	0.022
T43	7.2	0.4	6.8	0.4	0.4	0.06	0.28	0.50	<0.001
T44	7.6	0.4	7.4	0.4	0.2	0.06	0.06	0.29	0.004
T45	7.5	0.5	7.3	0.5	0.2	0.07	0.06	0.33	0.004
T46	11.4	0.6	11.0	0.6	0.4	0.08	0.24	0.55	<0.001
Anterior ratio	77.04	1.86	77.03	1.86	0.01	0.26	-0.51	0.52	0.987
Overall ratio	90.48	1.79	90.65	1.60	0.17	0.24	-0.64	0.31	0.486

; SD = standard deviation; SE = standard error.