Hanna’s Modified Sagittal Split Osteotomy (HSSO): An Alternative to Inverted L Osteotomy—Merging Function and Aesthetics for Enhanced Stability, Attractiveness, and Nerve Protection

Author:

Hanna Todd12,Bansal Ketan23,Ilesan Robert Radu2456ORCID,Buchbinder Daniel2

Affiliation:

1. Private Practice, Hanna Face and Jaw PC, New York, NY 10029, USA

2. Division of Oral and Maxillofacial Surgery, Department of Otolaryngology-Head and Neck Surgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Beth Israel, New York, NY 10029, USA

3. Department of Oral and Maxillofacial Surgery, Albert Einstein College of Medicine, Jacobi Medical Center, Bronx, NY 10461, USA

4. Department of Maxillofacial Surgery, ZMACK, AZ MONICA Antwerp, Harmoniestraat 48, 2018 Antwerp, Belgium

5. Department of Cranio-Maxillofacial Surgery, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium

6. Faculty of Medicine & Health Sciences, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerp, Belgium

Abstract

Background: The current high standards in orthognathic surgery demand surgical solutions that are both ⁠ functionally ⁠ effective and aesthetically pleasing. Our approach offers one for enhanced stability, attractiveness, and nerve protection ⁠ with improved accessibility ⁠ in the majority of orthognathic scenarios ⁠ compared to an inverted L osteotomy. Methods: A case series is presented to illustrate the application and outcomes of HSSO, an optimised approach that combines the advantages of a transoral inverted L osteotomy with specific enhancements and increased versatility, ⁠ with accessibility and exposure similar to a BSSO. Results: HSSO as a completely transoral technique, demonstrate the ability to perform significant counterclockwise rotations of the mandible, eliminating the need for trocars or skin incisions. We experinced high postoperative stability when HSSO was performed in conjunction with a three-piece LeFort 1 osteotomy on a dynamic opposing arch. In comparison to an inverted L approach, we postulated that HSSO offers advantages in stability, due to the increased segmental overlap of the proximal and distal segments of the mandible. This approach is designed to enhance the safety of the inferior alveolar nerve compared to traditional sagittal split methods. Furthermore, HSSO represents an alternative to total joint replacement in select cases of idiopathic condylar resorption and is effective for correcting mandibular asymmetries while maintaining jawline aesthetics. This is achieved through the manipulation of the mandibular angle, ramus height, and inferior border without creating a step deformity in the soft tissue. Conclusions: The outcomes of HSSO highlight its capacity to deliver predictable, functional, and aesthetically pleasing results, offering a viable alternative to more traditional orthognathic techniques.

Publisher

MDPI AG

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