Methods CASE I: A preoperative CT scan was taken (i-CAT) and obvious anterior mandibular atrophy was noted for the first 13mm (roughly midsymphysis) going coronally apically from mental foramen to foramen (Fig. 1). Reduction of mandible was indicated over grafting this site to provide room for prosthetics and level the horizontal plane of occlusion. Measurements for prosthetics were not taken into consideration on CT as this was not available when using i-CAT's treatment plan studio. Fig. 1 CASE II: A preoperative CT scan was taken and reviewed (PreXion) (Fig. 2). Similarly, an obvious unlevel plane of occlusion was noted for the anterior mandible. Reducing the mandible was again indicated; however, this time we used BlueSkyBio software in advanced segmentation mode to turn the mandible into an STL file. This was exported from BSB and imported into Meshmixer software, where we used the Plane Cut tool (Fig. 3) at the proper horizontal restorative plane to remove the atrophic excess of bone. We then imported it back into BSB to design a surgical bone reduction guide and a pilot drill guide (Fig. 4). Finally, the prosthetic plane was planned in the software to ensure enough room for fi xed prosthetics (Fig. 5). Fig. 2 Fig. 4 Fig. 3 Fig. 5 A more accurate, inexpensive, easy-to-use, surgical guide for bone reduction and implant placement is not only better for the patient, but also for the practitioner, and should be more routinely utilized. dentaltown.com \\ AUGUST 2018 101http://www.dentaltown.com