Publications by authors named "Kousuke Yasuda"
This study aimed to evaluate the performance of geometric morphometry (GM) to assess the changes in facial soft tissue after orthognathic surgery. Subjects were 27 patients (skeletal class III) who underwent bilateral sagittal split ramus osteotomy and 27 volunteers as a control group. Computed tomography images of each patient were obtained before surgery (T0) and 6 months after surgery (T1).
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- A new homologous modeling method was developed to create 3D models of human faces, allowing for detailed comparison of straight faces and posed smiles using principal component analysis (PCA).
- The study involved 38 volunteers (19 males and 19 females) and utilized 3D imaging software to analyze differences at 9 key facial landmarks.
- Significant differences were identified between straight faces and posed smiles in two specific principal components, highlighting changes in chin shape, eyelid length, nasal area, cheek swelling, and mouth angle, marking the first statistical verification of these facial changes.