To evaluate Intraoral volume changes in relation to the hard tissue shape changes in asymmetric patients before and after orthognathic surgery and establish a correlation between them.

A retrospective study which evaluated 12 asymmetric patients’ pre and post-surgical CT records satisfying the inclusion criteria. Borders were defined for the measurement of extraoral, intraoral and tongue volume. The volume assessment was carried out using software from 3D SYSTEMS, Colorado, US, Version 1.0.2.2055.

Predicting changes in volume between extra-oral, intra-oral spaces and tongue, Linear regression modeling of the data revealed that for every mm³ change in post-surgical extra-oral volume the post-surgical intra-oral volume decreased by 0.684 mm³ and for every mm³ change in post-surgical intra-oral volume, the post-surgical tongue volume increased by 0.728 mm³.

Significant decrease in the extra-oral volume, Intra-oral volume and tongue volume was evident after orthognathic surgery in patients with facial asymmetry. This volumetric approach sheds insight into achieving a muscular equilibrium between intraoral and extraoral structures, which would improve orofacial function and enhance facial aesthetics.