Objectives: The aim of this study was to investigate if the metal artifact reduction (MAR) tool used in the software of the ORTHOPANTOMOGRAPH® OP300 (Instrumentarium Dental, Tuusula, Finland) can improve the gray value levels in post-operative implant scans. Methods: Twenty potential implant sites were selected from five edentulous human dry mandibles. Each mandible was scanned by the cone beam computed tomography (CBCT) scanner and images were produced under 3 different conditions: implant sites drilled but no implants inserted, implants inserted without application of MAR and implants inserted with application of MAR. Using Geomagic (studio® 2012, Morrisville, NC) and 3Diagnosys (v5.3.1, 3diemme, Cantu, Italy) software, three scans of each mandible were superimposed. The mean gray value of identical regions of bone around the implants was derived for each condition. The differences between gray value measurements at implant sites derived from different conditions were assessed. Results: A significant difference was found between mean gray values from scans with no implants inserted and with implants inserted (with and without MAR) (p⁼ 0.012). No significant difference was revealed for gray values measured from scans with and without MAR (p⁼ 0.975). Conclusion: The MAR tool in the software of the ORTHOPANTOMOGRAPH® OP300 CBCT scanner does not significantly correct the voxel gray values affected by the metal artifact in the vicinity of an implant in human dry mandibles.