title: Evaluation of mandibular cortical bone thickness for placement of temporary anchorage devices (TADs).
abstract: OBJECTIVE
  In this study, we measured the cortical bone thickness in the mandibular buccal and lingual areas using computed tomography in order to evaluate the suitability of these areas for application of temporary anchorage devices (TADs) and to suggest a clinical guide for TADs.
  
  
  METHODS
  The buccal and lingual cortical bone thickness was measured in 15 men and 15 women. Bone thickness was measured 4 mm apical to the interdental cementoenamel junction between the mandibular canine and the 2nd molar using the transaxial slices in computed tomography images.
  
  
  RESULTS
  The cortical bone in the mandibular buccal and lingual areas was thicker in men than in women. In men, the mandibular lingual cortical bone was thicker than the buccal cortical bone, except between the 1st and 2nd molars on both sides. In women, the mandibular lingual cortical bone was thicker in all regions when compared to the buccal cortical bone. The mandibular buccal cortical bone thickness increased from the canine to the molars. The mandibular lingual cortical bone was thickest between the 1st and 2nd premolars, followed by the areas between the canine and 1st premolar, between the 2nd premolar and 1st molar, and between the 1st molar and 2nd molar.
  
  
  CONCLUSIONS
  There is sufficient cortical bone for TAD applications in the mandibular buccal and lingual areas. This provides the basis and guidelines for the clinical use of TADs in the mandibular buccal and lingual areas.
authors.affiliation: Department of Orthodontics, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea.
authors.forename: Jung-Hoon
authors.initials: JH
authors.lastname: Kim
authors.forename: Young-Chel
authors.initials: YC
authors.lastname: Park
keywords: Computed tomography; Mandibular cortical bone thickness; Temporary anchorage device