title: Maximum mouth opening in saudi adolescents.
abstract: BACKGROUND
  The aim of this study was to investigate the maximum mouth opening (MMO) in a representative sample of the Saudi adolescents.
  
  
  METHODS
  A total of 1825 Saudi adolescents (1007 males and 818 females) aged 12-16 years were randomly selected. The subjects were asked to open their mouth maximally till no further opening was possible and then the distance from the incisal edge of the maxillary incisors to incisal edge of the mandibular incisors was recorded. All data were analyzed using SPSS program and simple descriptive statistics of MMO with regard to gender and age groups were reported. The Student's t-test and one-way analysis of variance were used to examine differences in mouth opening relative to gender and age groups.
  
  
  RESULTS
  The mean maximal mouth opening for males was 43.5 ± 4.23 mm (range 29-59 mm). The mean maximal mouth opening for females was 35.5 ± 4.4 mm (range 20-45 mm). There was a significant difference between the mouth opening of males and females in all the age group (P = 0.000). The mouth opening, regardless of gender, increases significantly with age from the age of 12 years to the age of 14 years (P = 0.000), then remained unchanged till the age of 16 years.
  
  
  CONCLUSIONS
  The mouth opening of males is significantly higher than that of females in all the age group. There was a significant increase in MMO with age up to the age of 14 years regardless of gender.
authors: Associate Professor, Department of Pediatric Dentistry and Orthodontics, Division of Pediatric Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
authors: Yousef H
authors: YH
authors: Al-Dlaigan
authors: Assistant Professor, Department of Pediatric Dentistry and Orthodontics, Division of Orthodontics, College of Dentistry, King Saud University, Riyadh 12372-7325, Saudi Arabia.
authors: Moshabab A
authors: MA
authors: Asiry
keywords: Adolescent; maximum mouth opening; mouth opening
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