Page 20 - COS-FOD2015

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The i-CAT Vision software was used to view sagittal view using the distance tool of the soft-
and reconstruct the three dimensional views, ware (Fig 2, A, B). Since previous studies con-
CBCT scans of 47 subjects were included in cluded that there is no difference between right
this study (21 males and 26 females). Subjects and left side measurements of interradicular
mean age was 34.25 years. distance [16] only one side was measured in
each alveolar process.
Interradicular distance was measured in the
alveolar process of the maxilla and mandible Since all measurement were conducted by one
from distal of first premolar to mesial of second operator, only intra observer reliability was
molar at two different vertical levels (6, and measured. 10 images were remeasured two
8mm) from the cementoenamel junction weeks apart. All data entered into excel work-
(C.E.J). Areas measured are between first and sheet and analyzed using SPSS software ver-
second premolar (P-P), between second pre- sion 20.0. Descriptive statistics (mean and
molar and first molar (P-M), and between first standard deviation), were performed. t- test was
and second molar (M-M). used for gender comparisons. Intra –class cor-

relation coefficient was used to assess intra
To orient the area to be measured, the axial
observer reliability. Level of significance was
view of the software was rotated so that the
set at P < 0.05.
vertical reference line is at the centre of the two
teeth where interradicular distance between
them to be measured, and the horizontal refer-
Results
ence line is between the two teeth (Fig 1, A).
Intra –class correlation coefficient ranged be-
The sagittal view is rotated to orient the teeth
roots parallel to each other and the horizontal tween 0.84-0.95, which shows high intra ob-
reference line is used to mark the ce- server consistency.
mentoenamel junction (C.E.J) (Fig 1, B). The In the maxilla, interradicular distance was
interradicular distance then is measured in the

Table 1: Maxillary interradicular distance (mm)
Cut level Site Male Female t- test P value

Mean SD Mean SD
P-P 3.42 1.2 3.22 0.8 NS

P-M 3.83 0.9 3.46 1.4 NS
6 mm

M-M 2.6 0.85 2.7 0.7 NS

P-P 3.44 0.6 3.4 0.9 NS

P-M 3.85 0.8 3.6 0.4 *
8 mm

M-M 2.55 1.1 2.43 1.2 *

P-P, first premolar-second premolar; P-M, second premolar- first molar;
M-M, first molar-second molar. * P< 0.05; NS, not significant

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