title: Clinical evaluation of mastication: validation of video versus electromyography.
abstract: OBJECTIVE
  The ability to evaluate masticatory function in people with neurological disabilities is important as this function is often compromised in these groups. However, current standard techniques are often impossible in such groups due to cognitive difficulties. This study is a validation of several variables read from standardised video recordings of mastication as indicators of masticatory function.
  
  
  METHODS
  Fifteen healthy, fully dentate male subjects were recorded using EMG and by video simultaneously. An evaluation was undertaken of the video parameters (i) to compare their validity against the electromyographic parameters, (ii) to test intra-rater and inter-rater reliability and (iii) to test the ability to discriminate between four model foods differing in hardness.
  
  
  RESULTS
  Masticatory time and the number of masticatory cycles counted on video were found to be valid and reliable indicators. In addition, the number of active chewing cycles performed with an open mouth and identification of the chewing side, were found to have reasonable validity and reliability. The former may allow discrimination between food types.
  
  
  CONCLUSIONS
  As an alternative to the complex evaluation of masticatory function, observation of certain parameters from video recording could be an alternative for use in uncooperative patients.
authors.affiliation: EA3847, Université d'auvergne, Centre Hospitalier Universitaire, Faculté de Chirurgie Dentaire, Clermont-ferrand, France. martine.hennequin@u-clermont1.fr
authors.forename: M
authors.initials: M
authors.lastname: Hennequin
authors.forename: P J
authors.initials: PJ
authors.lastname: Allison
authors.forename: J L
authors.initials: JL
authors.lastname: Veyrune
authors.forename: M
authors.initials: M
authors.lastname: Faye
authors.forename: M
authors.initials: M
authors.lastname: Peyron
mesh_terms: D000328:Adult; D001732:Bite Force; D004576:Electromyography / Q000592:standards*; D006801:Humans; D008297:Male; D008409:Mastication / Q000502:physiology*; D008410:Masticatory Muscles / Q000502:physiology; D019370:Observation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014741:Video Recording / Q000592:standards*