Determining normal and abnormal lip shapes at border positions for use as a longitudinal surgical outcome measure

Summary Objective measures of facial movement are important for interventions where surgical repositioning of facial structures can influence soft tissue mobility and include the management of patients with cleft lip, facial nerve palsy and orthognathic surgery. As such, the aim of this study is to...

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Veröffentlicht in:Journal of oral rehabilitation 2013-05, Vol.40 (5), p.348-357
Hauptverfasser: Popat, H., Zhurov, A. I., Richmond, S., Marshall, D., Rosin, P. L.
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container_end_page 357
container_issue 5
container_start_page 348
container_title Journal of oral rehabilitation
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creator Popat, H.
Zhurov, A. I.
Richmond, S.
Marshall, D.
Rosin, P. L.
description Summary Objective measures of facial movement are important for interventions where surgical repositioning of facial structures can influence soft tissue mobility and include the management of patients with cleft lip, facial nerve palsy and orthognathic surgery. As such, the aim of this study is to present a method for determining the outcome of surgical procedures on lip shape during speech. A control group (CG) of 115 average subjects and 30 patients with a Class 3 malocclusion requiring bimaxillary surgery performed four reproducible verbal utterances during image capture using a non‐invasive, three‐dimensional (3D) motion scanner (3dMDFace™ Dynamic System). Landmark coordinates around the lips of the 3D facial shells were extracted and subjected to discriminant analysis and principal component analysis to statistically differentiate lip shapes between the CG and the patient group (PG) pre‐ and post‐surgery. Pre‐surgically, the PG showed statistically significant differences in lip shape during speech in the lateral and vertical dimensions, preferring a wider, shorter lip shape when compared with the CG for all the utterances. The shape differences normalised towards the CG post‐surgery. The method presented utilises pre‐existing statistical shape analyses and can be reproduced in the clinical setting to provide a diagnostic and functional outcome tool. In this example, correction of the Class 3 skeletal disproportions appeared to normalise lip shape during speech.
doi_str_mv 10.1111/joor.12037
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subjects Adult
anatomic landmarks
Anatomic Landmarks - pathology
angle class III/surgery
Cephalometry - methods
Dentistry
Discriminant Analysis
Female
Follow-Up Studies
Humans
Image Processing, Computer-Assisted - methods
imaging
Imaging, Three-Dimensional - methods
Incisor - pathology
Lip - pathology
lip/movement
Longitudinal Studies
Male
malocclusion
Malocclusion, Angle Class III - surgery
Mandible - pathology
Maxilla - pathology
Movement
Nasal Bone - pathology
Orthognathic Surgical Procedures - methods
Phonetics
Principal Component Analysis
Sella Turcica - pathology
Speech - physiology
speech articulation tests
three-dimensional/methods
Treatment Outcome
Young Adult
title Determining normal and abnormal lip shapes at border positions for use as a longitudinal surgical outcome measure
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