Dental Arch Dimensions in Saudi Adults

Table 3

Upper and lower premolars’ measurements including independent sample t-tests comparing males to females.

Abbreviation	Gender	n	Mean	Standard error of mean	Standard deviation	Minimum	Maximum	Significance (2-tailed)	Significance	Mean difference	Standard error difference	95% confidence interval of the difference
												Lower	Upper
Upper premolars
U5CC	M	73	40.53	0.35	2.96	35.43	47.98	0.005		1.56	0.55	0.48	2.63
	F	96	38.97	0.40	3.88	32.01	50.58
U5CL	M	73	35.92	0.40	3.43	29.70	50.04	0.000		2.17	0.54	1.11	3.23
	F	96	33.75	0.36	3.48	25.50	40.34
U5CG	M	73	32.07	0.34	2.93	25.91	38.19	0.005		1.59	0.56	0.49	2.69
	F	96	30.48	0.41	4.03	22.86	46.14
U5CB	M	73	46.41	0.42	3.60	37.85	53.83	0.002		1.73	0.55	0.64	2.82
	F	96	44.68	0.36	3.53	37.24	51.11
U5MC	M	73	38.78	0.34	2.94	32.49	45.35	0.000		1.73	0.46	0.83	2.63
	F	96	37.05	0.30	2.95	31.74	43.31
U4MC	M	73	35.74	0.38	3.21	29.66	43.44	0.003		1.46	0.49	0.49	2.42
	F	96	34.28	0.25	3.10	28.94	40.86
U4CL	M	73	30.99	0.40	3.40	25.77	38.91	0.024		1.22	0.53	0.16	2.27
	F	96	29.78	0.35	3.47	23.81	39.89
U4CG	M	73	27.84	0.37	3.12	20.85	34.27	0.000		1.72	0.48	0.78	2.66
	F	96	26.12	0.31	3.02	19.54	32.87
U4CB	M	73	41.06	0.55	4.72	14.36	49.59	0.278	NS	0.71	0.65	−0.58	1.99
	F	96	40.35	0.38	3.72	27.66	48.53
U4MC	M	73	34.57	0.35	2.96	26.37	39.45	0.032		1.05	0.48	0.09	2.00
	F	96	33.53	0.33	3.23	25.41	40.55
Lower premolars
L5CC	M	73	36.08	0.44	3.78	27.98	50.75	0.002		1.64	0.53	0.60	2.68
	F	96	34.44	0.31	3.09	28.62	46.46
L5CL	M	73	31.32	0.34	2.92	26.34	37.48	0.142	NS	0.74	0.50	-0.25	1.74
	F	96	30.58	0.35	3.47	25.62	45.87
L5CG	M	73	29.74	0.37	3.16	24.87	38.55	0.606	NS	0.57	1.10	-1.61	2.75
	F	96	29.17	0.92	9.00	23.42	87.64
L5MC	M	73	34.87	0.33	2.81	30.90	43.34	0.028		1.00	0.45	0.11	1.90
	F	96	33.86	0.30	2.99	27.51	44.70
L5CB	M	73	40.05	0.39	3.32	29.80	46.50	0.013		1.37	0.54	0.29	2.44
	F	96	38.68	0.37	3.65	30.26	44.74
L4CC	M	73	31.23	0.29	2.49	24.89	36.53	0.102	NS	0.66	0.40	-0.13	1.46
	F	96	30.57	0.27	2.67	24.82	37.16
L4MC	M	73	27.87	0.28	2.41	23.33	33.49	0.005		1.06	0.37	0.32	1.79
	F	96	26.81	0.24	2.38	21.86	31.37
L4CG	M	73	26.55	0.36	3.05	22.28	37.35	0.012		1.21	0.48	0.26	2.16
	F	96	25.34	0.32	3.10	19.79	35.15
L4CB	M	73	34.02	0.39	3.34	24.08	41.57	0.629	NS	0.22	0.46	-0.69	1.14
	F	96	33.79	0.27	2.69	25.46	38.68
L4MC	M	73	29.14	0.33	2.82	20.60	37.62	0.031		0.77	0.35	0.07	1.47
	F	96	28.37	0.18	1.77	24.31	31.41

NS: not significant; , , and .