A three-dimensional analysis of bone and soft tissue to bone ratio of movements in 17 Skeletal II patients following orthognathic surgery

The three-dimensional changes in the bone and the ratio of soft tissue to bone movement were investigated in a group of 17 Skeletal II patients following orthognathic surgery. CT scans were taken for each patient pre-operatively and 1 year post-operatively. The scans were superimposed, radial measur...

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Bibliographic Details
Published in:European journal of orthodontics 1993-04, Vol.15 (2), p.97-106
Main Authors: McCance, A. M., Moss, J. P., Fright, W. R., James, D. R., Linney, A. D.
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Adolescent
Adult
Cephalometry - methods
Dentistry
Face - physiopathology
Female
Humans
Male
Malocclusion, Angle Class II - physiopathology
Malocclusion, Angle Class II - surgery
Mandible - diagnostic imaging
Mandible - physiopathology
Maxilla - diagnostic imaging
Maxilla - physiopathology
Movement
Tomography, X-Ray Computed
Treatment Outcome
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Description
Summary:The three-dimensional changes in the bone and the ratio of soft tissue to bone movement were investigated in a group of 17 Skeletal II patients following orthognathic surgery. CT scans were taken for each patient pre-operatively and 1 year post-operatively. The scans were superimposed, radial measurements calculated, and the changes illustrated by two separate colour scales. There was a constant ratio of movement over the maxillae with the central part of the upper lip being moved in a 1: 1 ratio, increasing to a 1.25: 1 ratio over the canine regions and 1.5: 1 ratio over the paranasal areas. In the mandible there was a constant ratio of 1.25: 1 over the chin, mentalis, and canine regions bilaterally. The ratio reduced to 1: 1 over the body of the mandible.
ISSN:0141-5387
1460-2210
DOI:10.1093/ejo/15.2.97