Three-dimensional evaluation of distal and proximal segment skeletal relapse following isolated mandibular advancement surgery in 100 consecutive patients: A one-year follow-up study |
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| Institution: | 1. OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium;2. Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden;1. Department of Oral and Maxillofacial Surgery, Second Xiangya Hospital of Central South University, Changsha, Hunan, China;2. Department of Oral and Maxillofacial Surgery, Hainan Western Central Hospital, Danzhou, Hainan, China;3. Department of Oral and Maxillofacial & Head and Neck Oncology, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China;4. Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi Zhuang Autonomous Region, China;1. Sleep Disorders Center, Department of Neurology, University of Michigan, Ann Arbor, MI, USA;2. Department of Oral and Maxillofacial Surgery, University of Michigan, Ann Arbor, MI, USA;3. Sleep Disorders Center, Centro Médico Teknon, Barcelona, Spain;4. Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Michigan, Ann Arbor, MI, USA;5. Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA;6. Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA;1. Department of Oral and Maxillofacial – Head and Neck Oncology, Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China;2. Department of Oral and Maxillofacial Surgery, Xiangya Stomatological Hospital, Central South University, Changsha, Hunan, China;3. Department of Oral and Maxillofacial Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China;1. Division of Oral and Maxillofacial Surgery, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan;2. Division of Oral Pathology, Department of Disease Management Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan |
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| Abstract: | The aim of this study was to perform a three-dimensional evaluation of the skeletal relapse of the proximal and distal mandibular segments following isolated bilateral sagittal split osteotomy advancement surgery. One hundred consecutive patients (mean age 25.8 ± 11.7 years), comprising 65 female patients (mean age 26.4 ± 12.1 years) and 35 male patients (mean age 24.6 ± 11.0 years) requiring mandibular advancement without genioplasty, were enrolled prospectively in the study. Cone beam computed tomography scans were acquired for each patient at three time-points: preoperatively, immediately (1–6 weeks) after surgery, and 1 year after surgery. A validated tool was utilized to assess the surgical movement and relapse. Based on percentage, the majority of the distal and proximal translational and rotational movements relapsed within the range of ≤2 mm and ≤2°. The distal segment revealed a significant relapse in a posterior, inferior, and clockwise pitch direction. Both left and right proximal segments showed a significant translational relapse in the medial, posterior, and superior direction. Amongst the rotational parameters, proximal segments relapsed significantly in clockwise pitch, clockwise roll, and counterclockwise yaw direction. Overall, both distal and proximal bone segments showed a clinically acceptable translational and rotational stability. The proximal segments torqued towards their original position with a reduction of flaring. |
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| Keywords: | Mandibular advancement Three-dimensional imaging Recurrence Follow-up studies Cone beam computed tomography |
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