Table 1.

Distance in mm from axis of drill trajectory to facial nerve (FN) and chorda tympani (CT).

Ear tested	Distance to FN	Distance to CT
1	1.44	1.33
2	0.50	2.1
3	1.62	-
4	0.80	1.32
5	1.10	0.81
6	1.33	1.50
7	0.86	1.32
8	1.11	1.04
9	0.88	0.83
10	1.07	1.42
11	1.39	1.06
12	1.40	1.50
13	2.00	1.63
14	1.00	1.00
15	1.00	1.00
16	1.48	1.33
17	1.06	0.94
18	1.57	1.09
Mean	1.20	1.25
Standard Deviation	0.36	0.33