Determination of the Optimal Site for Orthodontic Mini Implant Placement in Maxillary and Mandibular Arch Using Cone Beam Computed Tomography

Abstract

Orthodontic mini-implants, also known as temporary anchorage devices (TADs), have revolutionized orthodontic treatment by providing stable anchorage for complex tooth movements. The success of mini-implants is highly dependent on their precise placement, which is influenced by cortical bone thickness, mesiodistal width, and buccolingual thickness. This study aims to determine the optimal sites for mini-implant placement in the maxillary and mandibular arches using Cone Beam Computed Tomography (CBCT). A retrospective analysis of CBCT scans was conducted to evaluate cortical bone thickness, mesiodistal width, and buccolingual thickness in various regions of the anterior and posterior arches at depths of 5 mm, 7 mm, and 10 mm. The results indicate that the posterior regions, especially the areas around the premolars and molars, offer thicker cortical bone and wider buccolingual support, making them ideal for mini-implant placement. In contrast, the anterior regions, although having greater mesiodistal width, present thinner cortical bone, which may limit stability. These findings provide clinicians with critical information for selecting safe and effective implant placement sites, ensuring more predictable orthodontic outcomes. The use of CBCT is emphasized for its accuracy in preoperative planning, reducing the risk of complications and improving mini-implant success rates.