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Midfacial Advancement Line-A Comparative Evaluation of a New Measurement Method in Orthognathic Surgery
Katrin Willinger1, Julia Cede2, Godoberto Guevara-Rojas3
1Radiographer and Researcher, Department of Craniofacial, Maxillofacial, and Oral Surgery, University Clinic of Craniofacial and Maxillofacial Surgery, Medical University of Vienna, Vienna, Austria.
Summary
A new Midfacial Advancement Line (MFAL) measurement method effectively visualizes and quantifies hard and soft tissue changes after intraoral quadrangular Le Fort II osteotomy. This tool aids in virtual surgical planning for midfacial advancement.
Area of Science:
- Oral and Maxillofacial Surgery
- Medical Imaging
- Surgical Planning
Background:
- Accurate simulation of hard and soft tissue changes is crucial for planning intraoral quadrangular Le Fort II osteotomy (IQLFIIO).
- Existing quantification methods may have limitations in comprehensive visualization and accuracy.
Purpose of the Study:
- To evaluate a novel method, the Midfacial Advancement Line (MFAL) measurement, for visualization and quantification of tissue changes in IQLFIIO.
- To compare MFAL with traditional point-to-point (PTP) and part comparison analysis (PCA) methods.
Main Methods:
- A measurement comparison study using the Bland-Altman method was conducted.
- Three quantification methods were assessed: PTP, PCA, and MFAL.
- Patients with midfacial deficiency and Class III malocclusion who underwent IQLFIIO were included.
Main Results:
- MFAL demonstrated no significant observer dependence, similar to PTP.
- No significant differences were found between PTP and MFAL measurements of midfacial advancement.
- MFAL showed a significant difference compared to PCA and achieved the highest visualization rating.
Conclusions:
- The Midfacial Advancement Line (MFAL) is a suitable method for visualizing and quantifying hard and soft tissue changes in a single image.
- MFAL can serve as a valuable tool for virtual planning of midfacial advancement surgery.
