Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 10 3 2013 05 15 240 7 Nasrin Esfahanizadeh Associated Professor, Department of Periodontics, Islamic Azad University, Dental Branch, Member of Dental Implant Research Center, Tehran University of Medical Sciences, Tehran, Iran. Damoun Shahraki Post Graduate Student, Department of Orthodontics, Islamic Azad University, Dental Branch, Tehran, Iran. Hamidreza Daneshparvar Assistant Professor, Legal Medicine Research Center, Tehran, Iran. Ahmad Reza Talaei Pour Professor and Chairman, Department of Radiology, Islamic Azad University, Dental Branch, Tehran, Iran. Mohammad Ali Saghiri Assistant Professor, Department of Dental material, Member of Craniofacial Research Center, Islamic Azad University, Dental Branch and Kamal Asgar Research Center (KARC), Tehran, Iran. Ahmad Sheibaninia Assistant Professor, Fellow of Orthosurgery, Department of Orthodontics, Azad University Dental School, Tehran, Iran. Shadab Rashtak Dentist, Dental Implant Research Center, Tehran University of Medical Scienses, Tehran, Iran. 2015 10 16 Objective : The aim of this study was to assess the amount of interdental bone in posterior areas of the mandible for placing orthodontic mini-implants to provide and control anchorage in orthodontic treatment. Materials and Methods : The amount of interdental bone in areas between the second premolars and first molars, first and second molars on the right and left sides of the mandible were determined in fifty patients by RVG using periapical radiographs. The images were assessed using Cygnus Media Software to determine the mesio-distal width of the interdental bone, starting at the crest of the alveolar bone (2 mm below the CEJ) every one millimeter up to 12 mm from the CEJ. The actual amount of interdental bone and the effect of related factors were assessed using chi-square test at a 95% confidence interval. Results : The minimum desired interdental bone width for placing mini-implants, 3 mm from the CEJ, between the second premolar and first molar and the first and second molars of the mandible on both sides were significantly different (p https://fid.tums.ac.ir/index.php/fid/article/view/658 https://fid.tums.ac.ir/index.php/fid/article/download/658/633