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Guided versus non-guided chin repositioning: a retrospective study on accuracy
Luis Fernando de Oliveira Gorla1, Marisa Aparecida Cabrini Gabrielli1, José Cleveilton Dos Santos1
1Department of Diagnostic and Surgery, São Paulo State University (Unesp), School of Dentistry, Araraquara, Brazil.
The British Journal of Oral & Maxillofacial Surgery
|August 10, 2024
Summary
This study compared freehand genioplasty with guided surgical techniques for chin deformities. While both methods showed similar accuracy, the guided technique demonstrated superior sagittal positioning, suggesting potential for improved outcomes in chin surgery.
Area of Science:
- Oral and Maxillofacial Surgery
- Plastic Surgery
- Biomedical Engineering
Background:
- Genioplasty is a surgical procedure to correct chin deformities.
- Accurate chin repositioning is crucial for successful orthognathic surgery.
- Current techniques include freehand and guided approaches.
Purpose of the Study:
- To compare the accuracy of freehand versus guided genioplasty.
- To evaluate positional and rotational accuracy against virtual surgical plans.
- To identify potential improvements for guided genioplasty techniques.
Main Methods:
- Retrospective analysis of 30 adult patients undergoing orthognathic surgery.
- Comparison of freehand chin repositioning with a specialized surgical guide technique.
- Assessment of translational and rotational accuracy against pre-operative virtual plans.
Main Results:
- Freehand group showed sagittal translational errors exceeding clinical limits (0.97 mm).
- Both groups exceeded acceptable limits for pitch rotation.
- No statistically significant differences were found between the groups in overall accuracy.
Conclusions:
- The guided technique achieved clinically acceptable accuracy in most positions and rotations.
- Guided genioplasty showed superior sagittal positioning compared to the freehand method.
- Further research with rigid guides and custom implants is recommended for enhanced accuracy.
