Table 2.

Mean values and standard deviations of measurements of the mesiodistal distance and buccal cortical bone thickness of mandible

Area	Height (mm)	1–1		1–2		2–3		3–4		4–5		5–6		6–7
		Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
MD	2	1	0.23	1.8	0.63	1.7	0.73	2.2	0.32	2.6	0.63	2.22	0.42	2.6	0.63
	4	0.9	0.31	2	0.54	2.3	0.64	2.5	0.34	3.27*	0.8	2.71	0.54	2.97	0.74
	6	0.9	0.32	2.2	0.64	2.4	0.74	2.7	0.43	3.91**	1	2.94	0.63	3.21*	0.94
	8	1	0.34	2.4	1.24	2.6	1.14	2.9	0.5	4.46**	1.15	3.41**	0.80	3.81**	1.16
	10	1	0.38	2.6	1.2	2.9	1.21	3.2*	0.53	4.94**	1.2	4.14**	1.13	5.04**	1.51
BC	2	0.6	0.21	0.8	0.11	0.9	0.24	0.9	0.36	0.96	0.31	1.12	0.46	1.77	1
	4	0.8	0.38	0.9	0.22	1.2	0.38	1.2	0.39	1.46	0.48	1.42	0.49	2.45	1.04
	6	0.8	0.62	0.9	0.23	1.5	0.63	1.6	0.42	1.66	0.52	1.69	0.52	2.93	0.86
	8	0.9	0.29	1	0.39	1.6	0.39	1.8	0.45	1.79	0.39	2.09	0.65	3.21	0.75
	10	1	0.38	1.2	0.42	1.9	0.48	2	0.48	2	0.37	2.39	0.68	3.19	0.64

1–1 = between central incisors, 1–2 = between central and lateral incisors, 2–3 = between lateral incisor and canine, 3–4 = between canine and first premolar, 4–5 = between first and second premolars, 5–6 = between second premolar and first molar, 6–7 = between first and second molars

*Average risk site, **safe site