Almost of the vomer bone skeletal parameters in relation to the maxilla base plane (ANS-PNS) skeletal parameter were diminished in both mild and severe malocclusion (B and C) groups by values of (44,2[+ or -]-57,41, 33,21[+ or -]60,98) mm respectively.
There were significant differences between the vomer bone length parameter represented by (C-Alp) and the vomer base parameter represented by (C-BV) with the severity of class III malocclusion (Type C) were (p< 0.01) respectively.
In contrast, there was no correlation between other vomer bone components.
The dimensional change of 3D reconstruction models of the vomer bone appeared highly significant differences in different groups in relation to the severity of malocclusion by values of (2090,3) [mm.sup.3] that the vomer bone became larger in size in severe group (Type C).
In this study, unlike previous studies that used a 2D conventional cephalometrics alone or CBCT 3D image analysis with misdiagnosed vomer bone.(23) Firstly, the parameter measured by using 2D cephalometrics landmarks and planes determination then after the vomer bone outline observed for the reconstruction of the 3D models without errors using algorithmic tools of Mimics 19.0 version software.
When the dimensional changes of skeletal parameters evaluated, the vomer bone components (Length, Mattress, Base and Height) (C-Alp, C-Ala, C-BV and Ala-BV) shown with values (53,81[+ or -]5,90, 42,94[+ or -]5,92, 23,65[+ or -]3,18, and 35,22[+ or -]4,45) respectively highly proportional and significant differences with maxillary length (ANS-PNS) parameters among different study groups.