en
Scientific article
English

Distances between facial landmarks can be measured accurately with a new digital 3-dimensional video system

Published inAmerican journal of orthodontics and dentofacial orthopedics, vol. 137, no. 5, p. 580e581-580e510;discussion580-581
Publication date2010
Abstract

INTRODUCTION: The aim of this study was to investigate a new digital 3-dimensional infrared video system to determine its accuracy, precision, and validity in measuring facial distances. METHODS: Bench experiments were performed by measuring the vertical and diagonal distances of chessboard squares of known length to determine the system's accuracy and precision. To test the system's validity, 16 healthy volunteers participated in this study. Vertical and horizontal distances of the face were measured electronically at rest, and on posed and aggressive smiles. All measurements were repeated after 8 weeks. Direct measurements of the intercanthal distance were obtained twice with calipers. RESULTS: A minor systematic error was found in the bench experiments, with the highest absolute error of 0.227 +/- 0.39 mm. The analysis with this video system showed good reproducibility of all measured distances when the mean of 2 frames was used to compare distances. Digital measurements of the intercanthal distances showed high agreement with the clinically obtained values. CONCLUSIONS: This digital video system can measure geometric distances in a 3-dimensional environment with high precision. Facial distances can be measured with good accuracy and precision, allowing applications in research and clinical practice.

Keywords
  • Adult
  • Benchmarking
  • Cephalometry/instrumentation/*methods/statistics & numerical data
  • Ear, External/anatomy & histology
  • Equipment Design
  • Eye/anatomy & histology
  • Eyebrows/anatomy & histology
  • Eyelids/anatomy & histology
  • Face/*anatomy & histology
  • Female
  • Humans
  • Image Processing, Computer-Assisted/instrumentation/*methods/statistics & numerical data
  • Imaging, Three-Dimensional/instrumentation/*methods/statistics & numerical data
  • Infrared Rays
  • Lip/anatomy & histology
  • Male
  • Nose/anatomy & histology
  • Reproducibility of Results
  • Smiling
  • Video Recording/instrumentation/*methods/statistics & numerical data
  • Young Adult
Citation (ISO format)
SCHIMMEL, Martin et al. Distances between facial landmarks can be measured accurately with a new digital 3-dimensional video system. In: American journal of orthodontics and dentofacial orthopedics, 2010, vol. 137, n° 5, p. 580e581–580e510;discussion580–581. doi: 10.1016/j.ajodo.2009.03.039
Main files (1)
Article
accessLevelRestricted
Identifiers
ISSN of the journal0889-5406
576views
0downloads

Technical informations

Creation05/23/2012 8:57:16 AM
First validation05/23/2012 8:57:16 AM
Update time03/14/2023 5:35:44 PM
Status update03/14/2023 5:35:44 PM
Last indexation02/12/2024 8:19:20 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack