Prevalence and anatomic topography of mandibular tori: Computed tomographic analysis

Youna Choi, Hyok Park, Jung Seok Lee, Jung Chul Park, Chang Sung Kim, Seong Ho Choi, Kyoo Sung Cho, Jung Kiu Chai, Ui Won Jung

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Purpose: Mandibular tori are located above the mylohyoid ridge. These features are relatively common in most populations, but their prevalence varies with race. The purpose of this study was to identify the prevalence and features of mandibular tori in a Korean population using computed tomographic (CT) images. Materials and Methods: The CT images of 726 patients were analyzed in this study. The presence or absence of a mandibular torus was identified on the CT images of each patient's quadrants and categorized according to gender and age. The most common location was also evaluated according to the corresponding teeth. The cortical thickness of each torus was evaluated using a 3-dimensional reconstruction software program. Results: The prevalence of mandibular tori in the entire sample was 24.1%, and most cases were bilateral. Mandibular tori were observed more frequently in young adults, with the prevalence being inversely related to age. The most frequently observed location was the premolar region, and the mean cortical thickness was 6.9 mm. Conclusions: Mandibular tori seem to change with aging. The prevalence in the present sample composed of Koreans was 24.1%, and younger patients may be more likely to develop a mandibular torus. Most tori presented a medium size bilaterally in the lingual aspect of the premolar region, and all were composed of cortical bone.

Original languageEnglish
Pages (from-to)1286-1291
Number of pages6
JournalJournal of Oral and Maxillofacial Surgery
Issue number6
Publication statusPublished - 2012 Jun

Bibliographical note

Funding Information:
This study was supported by grant A101578 from the Korea Healthcare Technology R&D Project , Ministry for Health, Welfare and Family Affairs, Republic of Korea.

All Science Journal Classification (ASJC) codes

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology


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