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A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
Published on: January 28, 2020
3D quantification of mandibular asymmetry using the SPHARM-PDM tool box
Abeer Alhadidi1, Lucia H Cevidanes, Beatriz Paniagua
1University of Jordan, Amman, Jordan. Alhadida@dentistry.unc.edu
International Journal of Computer Assisted Radiology and Surgery
|November 18, 2011
Summary
Quantitative shape modeling using SPHARM-PDM improves mandibular asymmetry diagnosis in orthognathic surgery patients. This 3D analysis reveals complex, generalized asymmetry in most cases, aiding personalized treatment planning.
Area of Science:
- Medical imaging
- Quantitative morphology
- Surgical planning
Background:
- Mandibular asymmetry diagnosis is crucial for orthognathic surgery.
- Accurate pretreatment assessment improves surgical outcomes.
- Traditional methods may lack precision in quantifying asymmetry.
Purpose of the Study:
- To evaluate the effectiveness of the UNC SPHARM-PDM toolbox for quantitative diagnosis of mandibular asymmetry.
- To assess the role of 3D shape modeling in improving pretreatment diagnosis for orthognathic surgery patients.
Main Methods:
- Constructing 3D virtual surface models from CBCT scans.
- Utilizing SPHARM-PDM and Procrustes analysis for shape modeling and asymmetry quantification.
- Comparing hemimandibles with their mirrored contralateral sides to assess discrepancies.
Main Results:
- No significant differences were found based on mirroring the left or right side.
- Distance maps effectively located and quantified asymmetry.
- Generalized asymmetry involving the condyle, ramus, and corpus was observed in 74.2% of cases.
Conclusions:
- 3D diagnosis highlights the complex and heterogeneous nature of mandibular asymmetry.
- SPHARM-PDM shows significant potential for individual diagnosis and quantification of mandibular asymmetry.
