Differences in three-dimensional soft tissue changes after upper,lower, or both jaw orthognathic surgery in skeletal class III patients |
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| Institution: | 1. Section of Maxillofacial Orthognathics, Department of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan;2. Division of Orofacial Functions and Orthodontics, Department of Health Improvement, Faculty of Dentistry, Kyushu Dental University, Tokyo, Japan;1. Department of Plastic and Reconstructive Surgery, Yale University School of Medicine, New Haven, CT 06520, USA;2. Dental Section, Panyananthaphikkhu Chonprathan Medical Center, Srinakharinwirot University, Nonthaburi, Thailand;1. Oral and Maxillofacial Surgery Division, Universidade de Pernambuco (UPE), Recife, PE, Brazil;2. Surgery Department, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil;3. Oral diagnosis Division, Faculdade de Odontologia de Bauru, Universidade de São Paulo (USP), Bauru, SP, Brazil;4. Stomatology Division, Universidade de Pernambuco (UPE), Recife, PE, Brazil;5. Universidade de Pernambuco (UPE), Recife, PE, Brazil;7. Oral and Maxillofacial Surgery Division, Hospital Regional do Agreste (HRA), Caruaru, PE, Brazil;1. Fachklinik Hornheide, Department of Cranio-Maxillofacial Surgery, Dorbaumstrasse 300, 48157 Muenster, Germany;2. University Hospital Münster, Department of Cranio-Maxillofacial Surgery, Waldeyerstraße 30, 48149 Muenster, Germany;3. University Hospital Münster, Department of Prosthetic Dentistry and Biomaterials, Waldeyerstraße 30, 48149 Muenster, Germany |
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| Abstract: | The decision is not always straightforward as to which orthognathic procedure is best for a good aesthetic result; three-dimensional imaging has brought new insight into this topic. The aim of this prospective study was to verify objectively whether postoperative changes occur within those regions not directly affected by surgical movements of the underlying jaw bones. The study included 83 young adults with skeletal class III deformities. They were classified into three groups according to the type of surgery: bilateral sagittal split osteotomy set-back of the mandible (BSSO), Le Fort I advancement of the maxilla, or a combination of both. Pre- and postoperative optical scans were registered as regional best-fits on the areas of the foreheads and both orbits. The shell to shell differences were measured and the average distances between the observed regions were calculated. As expected, changes were greatest in the regions where the underlying bones had been moved, but regardless of the operation performed, changes were found over the whole face. Changes in the nose, cheek, and upper lip regions in the BSSO group and in the lower lip and chin region in the Le Fort I group confirmed the concept of the facial soft tissue mask acting as one unit. |
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| Keywords: | 3D postoperative changes soft tissue skeletal class III |
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