title: Radiologic assessment and frequency of idiopathic osteosclerosis of jawbones: an interpopulation comparison.
abstract: BACKGROUND
  Idiopathic osteosclerosis is a localized growth of compact bone with an unknown cause. This asymptomatic lesion is an insignificant finding and as such requires no treatment. It should be distinguished from other types of osteosclerosis created by inflammatory processes and systemic diseases.
  
  
  OBJECTIVE
  To determine the prevalence and distribution of idiopathic osteosclerosis in the jawbones in Iran and to compare this prevalence and distribution with other populations.
  
  
  METHODS
  This cross-sectional descriptive study was performed in the Dental School of Shahid Beheshti University of Medical Sciences, Tehran, between 2010 and 2011. Data were collected from the files of patients who underwent panoramic radiography for dental treatment. Location, shape, and relation between idiopathic osteosclerosis and the tooth as well as the resorption of the tooth involved were evaluated. Lesion distribution regarding age, gender, localization, shape, dental relationship, and root resorption was assessed using the chi-squared test.
  
  
  RESULTS
  In total, 787 panoramic radiographs of 456 women and 331 men were assessed. Idiopathic osteosclerosis was detected in 75 (9.5%) patients. The prevalence of idiopathic osteosclerosis was significantly higher in the women (11.8% vs. 6.3%; P < 0.01). The mean age of the patients with idiopathic osteosclerosis was 31.9 ± 17.9 years and 30.8 ± 13.3 years in the patients without idiopathic osteosclerosis. The distribution of idiopathic osteosclerosis in the mandible (97.3%), mostly in the premolar region, was significantly higher than that in the maxilla (2.7%).
  
  
  CONCLUSIONS
  Our results showed high frequencies of idiopathic osteosclerosis in Iran in comparison to some other countries.
authors: Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Mahkameh
authors: M
authors: Moshfeghi
authors: Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran fateme.azimi.dmfr@gmail.com.
authors: Fateme
authors: F
authors: Azimi
authors: Department of Cardiology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.
authors: Mehdi
authors: M
authors: Anvari
mesh_terms: D000328:Adult; D017677:Age Distribution; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007492:Iran; D007568:Jaw / Q000000981:diagnostic imaging*; D007571:Jaw Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D008297:Male; D010026:Osteosclerosis / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D015995:Prevalence; D011862:Radiography, Panoramic / Q000379:methods*; D017678:Sex Distribution
keywords: Idiopathic osteosclerosis; panoramic radiography; prevalence