Study of midface dimorphism during growth on clinical CT using surface registration without segmentation: A...

Area of Science:

• Craniofacial development
• Human anatomy
• Medical imaging analysis

Background:

• Human midface development, including sex dimorphism and growth, remains incompletely understood.
• Complex interactions between structures like the sphenoid bone and maxilla present analytical challenges.
• Existing methods like anthropometry and morphometry are continuously being refined.

Purpose of the Study:

• To develop a novel, segmentation-free surface registration method for analyzing midface development.
• To visualize sex and age-related shape changes in the developing human midface.
• To investigate the influence of growth and dimorphism on midface structures independently of size.

Main Methods:

• Utilized MultiSlice Computed Tomography (MSCT) data from children aged 0-15 years.
• Developed a surface registration technique without requiring segmentation.
• Generated mean shapes by sex and age, and created colorimetric maps of deformations.

Main Results:

• Identified significant sex and age-related differences in midface shape, visualized by voxel changes.
• Linked observed deformations to dental eruption, bone remodeling, and maxillary sinus displacement.
• Noted earlier manifestation of these processes in females compared to males.

Conclusions:

• The developed method shows promise for understanding midface growth and dimorphism.
• Results highlight the interplay between dental development, bone remodeling, and craniofacial structure.
• Further refinement is needed, but the approach can improve diagnosis and treatment of midface pathologies.