Pre-operative planning in maxillofacial surgery is a crucial phase in the treatment of dento-skeletal deformities, as it has a decisive impact on both the functional and aesthetic outcome. Despite advances in 3D imaging techniques and surgical simulation software, there is still a lack of 3D morphological models specific to population, sex and age that can be used as objective targets during planning. This study, aimed at developing sex-specific 3D normotypes for the population of healthy, normal-weight young Caucasian adults, proposes an objective morphological reference to support surgeons in defining preoperative objectives. The study was carried out in collaboration with the team from the Maxillofacial Surgery Department of Molinette Hospital in Turin, ensuring full consistency between methodological development and clinical application.