Abstract
TORONTO facial tetrahedron 3D analysis: efficient cephalometric application for surgical mandibular asymmetry, genioplasty, and predictive response to functional dentofacial orthopedic appliances
Highlights
A relatively simple-to-draw, four-sided geometry is recommended to represent a more realistic and practical facial form for efficient cephalometric evaluation in a busy orthodontic practice
The ideal average angle for caucasians formed at the lower right corner of the tetrahedron is 64o in the Tetrahedron analysis
This coincidentally matches with the ideal FMIA located in the upper right corner of the inverted Tweed Triangle
Summary
TORONTO facial tetrahedron 3D analysis: efficient cephalometric application for surgical mandibular asymmetry, genioplasty, and predictive response to functional dentofacial orthopedic appliances. The tetrahedron adds the simple key measurement of CoGnMe shown to provide greater predictability toward more successful orthodontic outcomes with specific types of orthodontic appliances. This includes fixed and removable functional appliances, but headgear, and Class II elastics used in skeletal Class II treatment. A second related problem in the orthodontic profession is a large proportion of orthodontic clinicians (approximately 60%) report growingly [3] they do not trace cephalometric radiographs for diagnosis and treatment planning [4,5] This is often because it is too time-consuming or complex for the orthodontic team, or they feel it is unnecessary. The purpose of the tetrahedron in the tracing is to be, quick to draw, user-friendly and accurate for the orthodontic staff in order to preserve and attempt to revive the high value of cephalometric measurements under attack, and declining in the orthodontic specialty (Figure 1)
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