Interdisciplinary Management of Severe Skeletal Class II Malocclusion with Three-Piece Le Fort I and Bilateral Sagittal Split Osteotomy: A Case Report.

Background and Clinical Significance: Severe skeletal Class II malocclusion associated with periodontal compromise and posterior edentulism requires a carefully sequenced interdisciplinary treatment approach integrating orthodontic, surgical, periodontal, and prosthetic rehabilitation. Case Presentation: This case report describes the comprehensive interdisciplinary management of a 21-year-old female patient presenting with skeletal Class II malocclusion, severe mandibular retrognathia, vertical maxillary excess, labial incompetence, temporomandibular joint (TMJ) dysfunction and periodontal deficiencies. The treatment sequence involved occlusal splint therapy, pre-surgical orthodontic decompensation, bimaxillary orthognathic surgery using a segmental Le Fort I osteotomy and bilateral sagittal split osteotomy (BSSO), postoperative orthodontic refinement with aligners, periodontal plastic surgery using the Zucchelli technique and guided bone regeneration (GBR) with implant placement in the posterior mandible. At the four-year follow-up, the patient demonstrated complete root coverage, stable skeletal correction, and satisfactory implant integration, with maintenance of functional and aesthetic outcomes over time. Conclusions: This report highlights the importance of precise preoperative planning and the synergy between orthodontics, orthognathic surgery and periodontics in achieving optimal functional and aesthetic results.