This retrospective study was approved by our institutional review board. This study analyzed CT images of patients who underwent orthognathic surgery. Specifically, the study used CT images of mandibles that were taken during preoperative diagnosis work-ups. All patients were diagnosed preoperatively with skeletal class III malocclusion. The CT images were taken with a Siemens Sensation 64 system (1.0 mm slice thickness, Siemens Sensation 64 CT scanner; Siemens AG, Erlangen, Germany) using a pixel size of 0.4375 mm and a field-of-view of 22.40 cm. We excluded CT data from facial asymmetry patients with a mandibular shift greater than 5 mm (considered more than a moderate state of asymmetry).7 (link) The CT data were collected for a total of 85 patients, and both right and left MnF images were analyzed.
Protocol detail
Skeletal Class III Malocclusion in Orthognathic Surgery
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Class iii malocclusion
Ct scanner
Institutional review board
Mandibular
Orthognathic surgery
Patients
Sensation system
Skeletal
Corresponding Organization :
Other organizations : National Health Insurance Service, National Health Insurance Service Ilsan Hospital, Yonsei University
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Variable analysis
independent variables
- None explicitly mentioned
- Mandibular morphology and characteristics measured from CT images
- Patients diagnosed with skeletal class III malocclusion
- CT images taken with Siemens Sensation 64 system (1.0 mm slice thickness, 0.4375 mm pixel size, 22.40 cm field-of-view)
- Excluded patients with mandibular shift greater than 5 mm
- Positive control: Patients diagnosed with skeletal class III malocclusion
- Negative control: Patients with mandibular shift greater than 5 mm (excluded)
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