. Author manuscript; available in PMC: 2013 Apr 1.

Published in final edited form as: Otol Neurotol. 2012 Apr;33(3):328–334. doi: 10.1097/MAO.0b013e318245cc9f

Table 1.

Comparison of relationship about the long axis of the basal turn of the cochlea.

Relationship	Average Pediatric Angle (SD)	Average Adult Angle (SD)	P value
BT:LatEAC	20.55 (0.82)	24.28 (0.88)	0.003
BT:⊥FR	5.15 (0.62)	6.88 (0.66)	0.009
BT:⊥TM	53.96 (0.94)	31.47 (1.01)	<0.001
BT:TRJ	32.56 (1.98)	21.90 (2.13)	<0.001

(SD=standard deviation; BT=long axis of the basal turn of the cochlea; LatEAC=center line of the external auditory canal; ⊥FR=line perpendicular to the facial recess; ⊥TM =line perpendicular to the tympanic membrane; TRJ=ideal drilling trajectory for cochleostomy)