title: Soft tissue cephalometric norms of Iranian Class I adults with good occlusions and balanced faces.
abstract: OBJECTIVE
  The aim of this study was to assess the soft tissue measurements of Iranians with good occlusion and to compare the Iranian norms with other ethnicities.
  
  
  METHODS
  A total of 25 anthropometric variables were measured by a dentist in 50 Iranian Class I subjects (25 males, 25 females) with good occlusion and well-balanced faces. The differences between the two genders, as well as the differences between Iranian norms and the Holdaway and Burstone analyses, were statistically analyzed using a t-test (α=0.05).
  
  
  RESULTS
  The subjects' mean age was 21.6±4.1 years. There were significant differences between males and females regarding the mentocervical angle, the nasolabial angle, Merrifield's Z-angle, the angle of facial convexity, soft tissue chin thickness, and upper lip thickness (P<0.05). The Holdaway norms can be used for the Iranian population, except for the following measurements which might be significantly different: facial convexity angle, nasolabial angle, interlabial gap, soft tissue facial angle, skeletal profile convexity, H-angle, lower lip to H-line, lower sulcus depth, and soft tissue chin thickness (P<0.05).
  
  
  CONCLUSIONS
  There was a considerable sex dimorphism in the Iranian population. The Holdaway norms are not useful for the Iranian population regarding most measurements.
authors: Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran.
authors: Fariborz
authors: F
authors: Amini
authors: Dentist in Private Practice, Tehran, Iran. Electronic address: zsr.dentist@gmail.com.
authors: Zeinab Sadat
authors: ZS
authors: Razavian
authors: Department of Dental Anatomy and Morphology, Dental Branch, Islamic Azad University, Tehran, Iran.
authors: Vahid
authors: V
authors: Rakhshan
mesh_terms: D002508:Cephalometry; D005145:Face; D005260:Female; D006801:Humans; D007492:Iran; D008297:Male; D012727:Sex Characteristics; D055815:Young Adult
keywords: Anthropometry; Ethnic groups; Orthodontic photography; Sexual dimorphism