Dynamic facial asymmetry in patients with repaired cleft lip using 4D imaging (video stereophotogrammetry)

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background Unilateral cleft lip is a profoundly asymmetrical condition affecting all hard and soft tissue layers from the nose to the upper lip. Although the asymmetry is minimized through cleft lip repair, a degree of asymmetry inevitably persists. Studies investigating asymmetry in patients with cleft lip have used facial measurements, and static 2D and 3D photography. The nose/lip/mouth area, however, is rarely static in our day to day social interactions. Methods Non-syndromic patients with cleft lip and palate, and a control group without orofacial clefts underwent 50 frames per second 4D imaging while generating facial expressions including smiling and pouting. Key landmarks were tracked throughout the expression, corrected for head movement and a motion path of each landmark was generated. Asymmetry was assessed for both extent of displacement, using Euclidean distances between frames, and the shape of the motion path using Procrustes analysis. Results Twelve patients were compared in each group with an age range from 8 to 18. Comparing the motion path of key landmarks in the upper lip demonstrated statistically significant differences in both the magnitude and shape of motion during smiling and pouting between cleft and non-cleft groups. Conclusion Video stereophotogrammetry of the repaired cleft lip demonstrates asymmetry of both the magnitude of motion as well as asymmetry of the path of the motion itself. This may be due to the effect of the scar tissue from the repair, from the abnormal anatomy involved with cleft lip or a combination of the two.

Original languageEnglish (US)
Pages (from-to)8-12
Number of pages5
JournalJournal of Cranio-Maxillofacial Surgery
Volume45
Issue number1
DOIs
StatePublished - Jan 1 2017

Fingerprint

Photogrammetry
Facial Asymmetry
Cleft Lip
Lip
Smiling
Nose
Head Movements
Facial Expression
Photography
Cleft Palate
Interpersonal Relations
Cicatrix
Mouth
Anatomy
Age Groups
Control Groups

Keywords

  • 4D imaging
  • Asymmetry
  • Cleft lip
  • Video stereophotogrammetry

ASJC Scopus subject areas

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology

Cite this

@article{9a3b7ec6fa874931bf9b5cd4746854c4,
title = "Dynamic facial asymmetry in patients with repaired cleft lip using 4D imaging (video stereophotogrammetry)",
abstract = "Background Unilateral cleft lip is a profoundly asymmetrical condition affecting all hard and soft tissue layers from the nose to the upper lip. Although the asymmetry is minimized through cleft lip repair, a degree of asymmetry inevitably persists. Studies investigating asymmetry in patients with cleft lip have used facial measurements, and static 2D and 3D photography. The nose/lip/mouth area, however, is rarely static in our day to day social interactions. Methods Non-syndromic patients with cleft lip and palate, and a control group without orofacial clefts underwent 50 frames per second 4D imaging while generating facial expressions including smiling and pouting. Key landmarks were tracked throughout the expression, corrected for head movement and a motion path of each landmark was generated. Asymmetry was assessed for both extent of displacement, using Euclidean distances between frames, and the shape of the motion path using Procrustes analysis. Results Twelve patients were compared in each group with an age range from 8 to 18. Comparing the motion path of key landmarks in the upper lip demonstrated statistically significant differences in both the magnitude and shape of motion during smiling and pouting between cleft and non-cleft groups. Conclusion Video stereophotogrammetry of the repaired cleft lip demonstrates asymmetry of both the magnitude of motion as well as asymmetry of the path of the motion itself. This may be due to the effect of the scar tissue from the repair, from the abnormal anatomy involved with cleft lip or a combination of the two.",
keywords = "4D imaging, Asymmetry, Cleft lip, Video stereophotogrammetry",
author = "Hallac, {Rami R.} and Jennifer Feng and Kane, {Alex A.} and Seaward, {James R.}",
year = "2017",
month = "1",
day = "1",
doi = "10.1016/j.jcms.2016.11.005",
language = "English (US)",
volume = "45",
pages = "8--12",
journal = "Journal of Cranio-Maxillo-Facial Surgery",
issn = "1010-5182",
publisher = "Churchill Livingstone",
number = "1",

}

TY - JOUR

T1 - Dynamic facial asymmetry in patients with repaired cleft lip using 4D imaging (video stereophotogrammetry)

AU - Hallac, Rami R.

AU - Feng, Jennifer

AU - Kane, Alex A.

AU - Seaward, James R.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Background Unilateral cleft lip is a profoundly asymmetrical condition affecting all hard and soft tissue layers from the nose to the upper lip. Although the asymmetry is minimized through cleft lip repair, a degree of asymmetry inevitably persists. Studies investigating asymmetry in patients with cleft lip have used facial measurements, and static 2D and 3D photography. The nose/lip/mouth area, however, is rarely static in our day to day social interactions. Methods Non-syndromic patients with cleft lip and palate, and a control group without orofacial clefts underwent 50 frames per second 4D imaging while generating facial expressions including smiling and pouting. Key landmarks were tracked throughout the expression, corrected for head movement and a motion path of each landmark was generated. Asymmetry was assessed for both extent of displacement, using Euclidean distances between frames, and the shape of the motion path using Procrustes analysis. Results Twelve patients were compared in each group with an age range from 8 to 18. Comparing the motion path of key landmarks in the upper lip demonstrated statistically significant differences in both the magnitude and shape of motion during smiling and pouting between cleft and non-cleft groups. Conclusion Video stereophotogrammetry of the repaired cleft lip demonstrates asymmetry of both the magnitude of motion as well as asymmetry of the path of the motion itself. This may be due to the effect of the scar tissue from the repair, from the abnormal anatomy involved with cleft lip or a combination of the two.

AB - Background Unilateral cleft lip is a profoundly asymmetrical condition affecting all hard and soft tissue layers from the nose to the upper lip. Although the asymmetry is minimized through cleft lip repair, a degree of asymmetry inevitably persists. Studies investigating asymmetry in patients with cleft lip have used facial measurements, and static 2D and 3D photography. The nose/lip/mouth area, however, is rarely static in our day to day social interactions. Methods Non-syndromic patients with cleft lip and palate, and a control group without orofacial clefts underwent 50 frames per second 4D imaging while generating facial expressions including smiling and pouting. Key landmarks were tracked throughout the expression, corrected for head movement and a motion path of each landmark was generated. Asymmetry was assessed for both extent of displacement, using Euclidean distances between frames, and the shape of the motion path using Procrustes analysis. Results Twelve patients were compared in each group with an age range from 8 to 18. Comparing the motion path of key landmarks in the upper lip demonstrated statistically significant differences in both the magnitude and shape of motion during smiling and pouting between cleft and non-cleft groups. Conclusion Video stereophotogrammetry of the repaired cleft lip demonstrates asymmetry of both the magnitude of motion as well as asymmetry of the path of the motion itself. This may be due to the effect of the scar tissue from the repair, from the abnormal anatomy involved with cleft lip or a combination of the two.

KW - 4D imaging

KW - Asymmetry

KW - Cleft lip

KW - Video stereophotogrammetry

UR - http://www.scopus.com/inward/record.url?scp=85008151769&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85008151769&partnerID=8YFLogxK

U2 - 10.1016/j.jcms.2016.11.005

DO - 10.1016/j.jcms.2016.11.005

M3 - Article

C2 - 28011182

AN - SCOPUS:85008151769

VL - 45

SP - 8

EP - 12

JO - Journal of Cranio-Maxillo-Facial Surgery

JF - Journal of Cranio-Maxillo-Facial Surgery

SN - 1010-5182

IS - 1

ER -