Reverse Pin-Art Concept. New concept in guided osseous sculpting for surgical approach of maxillary fibrous dysplasia: Case report

Fibrous dysplasia is a benign developmental lesion characterized by substitution of normal bone by poorly organized woven bone and fibrous tissue. Three variants exist: monostotic, polyostotic, and syndromic, the latter associated with syndromes such as McCune-Albright and Mazabraud. Clinical manifestations include malocclusion, asymmetries, tooth displacement, and painless swelling. Radiologically, it presents as a homogeneous ground glass radiopacity in continuity with normal bone, with progression typically ceasing at skeletal maturity. This article introduces "Reverse pinart concept” a novel guided bone sculpting and minimally invasive technique for precise bone contouring using digital planning and patient-specific surgical guides. Applied at the Department of Surgery, School of Dentistry, University of Buenos Aires, the technique combined CT-based craniofacial 3D reconstruction with mirroring to define resection boundaries. This approach enables less extensive surgical access, reduces postoperative morbidity, prevents damage to adjacent structures, and achieves accurate symmetrical outcomes.