Genioplasty is a widely used surgical approach to address chin deformities by performing an osteotomy on the mandible’s inferior border, allowing for comprehensive chin repositioning. This study aims to compare the accuracy of freehand chin repositioning with a guided technique, which employs specialized surgical guides. For this retrospective study, data from 30 adult patients who underwent orthognathic surgery to correct dentofacial deformities will be analyzed. All patients underwent virtual planning before surgery, with half of them undergoing freehand chin repositioning and the other half using the guided technique. The surgical outcomes will be measured and compared with the virtual planning to assess the positional and rotational accuracy of the techniques. In terms of translational assessment, noteworthy values exceeding clinically acceptable limits were observed only in sagittal movement in the group that did not use guides: 0.97mm (IQR 0.73 – 2.29mm). Regarding rotational accuracy, both groups exhibited an interquartile range surpassing acceptable limits for pitch: 3.26° (IQR 2.06 – 5.20) for the guided group and 2.57° (IQR 1.63 – 4.24°) for the freehand group. The Mann-Whitney test indicated no statistical differences between the groups in any translational or rotational assessments. In conclusion, although there was no statistical difference, the guided technique proved effective in achieving clinically acceptable accuracy in all positions and almost all rotations, displaying superior results in achieving sagittal position compared to the freehand technique. To fully harness the advantages of guides and guarantee accuracy in all rotations, we recommend further research involving guides made of more rigid materials and customized implants.