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Quantitative Assessment Protocol for Facial Soft Tissue Volumetric Changes with Stereophotogrammetry

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Published on: December 9, 2025

Cranial base superimposition for 3-dimensional evaluation of soft-tissue changes.

Lucia H C Cevidanes¹, Alexandre Motta, William R Proffit

¹Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC 27599, USA. cevidanl@dentistry.unc.edu

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics

|April 13, 2010

Summary

Quantify facial soft-tissue changes using a novel cone-beam computed tomography (CBCT) method. This technique accurately measures alterations from growth or treatment, outperforming traditional 3D imaging methods.

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Area of Science:

Dentistry
Orthodontics
Medical Imaging

Background:

3D analysis of soft tissues is crucial for diagnosis and treatment planning.
Detecting changes in facial soft tissues due to growth or treatment requires reliable reference structures.
Accurate quantification of soft-tissue changes is essential for effective treatment evaluation.

Purpose of the Study:

To present a technique for quantifying facial soft-tissue changes using cone-beam computed tomography (CBCT) data.
To enable detailed examination of soft-tissue alterations resulting from growth or orthodontic treatment.
To provide a quantitative method for assessing soft-tissue changes that overcomes limitations of other 3D imaging techniques.

Main Methods:

Utilized fully automated voxel-wise registrations of the cranial base surface from CBCT data.
Calculated Euclidean surface distances between 3D soft-tissue models to assess changes.
Employed color maps for visual assessment and quantification of soft-tissue alterations.

Main Results:

The developed methodology enables detailed examination of soft-tissue changes.
Quantitative assessment of facial soft-tissue modifications is achievable with high precision.
The technique provides a robust way to track alterations over time.

Conclusions:

The proposed CBCT-based method accurately quantifies soft-tissue changes.
Traditional methods like 3D photogrammetry, 3D photography, and laser scanning lack stable references for accurate soft-tissue change quantification.
This technique offers a significant advancement in analyzing craniofacial soft-tissue dynamics.