Maxillofacial Plastic and Reconstructive Surgery

  • Volume 42
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  • Pages.11.1-11.8
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  • 2020
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  • 2288-8101(pISSN)
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  • 2288-8586(eISSN)
Korean Association of Maxillofacial Plastic and Reconstructive Surgeons (대한악안면성형재건외과학회)
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Skeletal stability after 2-jaw surgery via surgery-first approach in facial asymmetry patients using CBCT

  • Hwang, Dae Seok (Dental Research Institute, Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Pusan National University Dental Hospital, Dental Research Institute) ;
  • Seo, Jeong Seok (Department of Dental Clinic, Bongseng Hospital) ;
  • Choi, Hong Seok (Department of Dental Clinic, Kosin University Hospital)
  • Received : 2019.09.05
  • Accepted : 2020.03.19
  • Published : 2020.12.31
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Abstract

Background: The purpose of this study is to compare the skeletal stability of two-jaw surgery via surgery-first approach with conventional two-jaw surgery in facial asymmetry patients by measuring the skeletal changes after surgery from a three-dimensional analysis. From January 2010 to January 2014, 40 patients with facial asymmetry who underwent two-jaw surgery in Pusan National University Hospital were included in this study. They were classified into experimental group (n = 20) who underwent two-jaw surgery via surgery-first approach and control group (n = 20) who underwent conventional two-jaw surgery. After selection of 24 landmarks and the construction of horizontal and sagittal, coronal reference planes, changes in 10 linear measurements and 2 angular measurements were compared between the surgery-first approach and conventional groups in the preoperative, immediate postoperative, and postoperative periods. The paired t test and Student t test were used for statistical analysis. The mean and standard deviation of the measurement were calculated for the experimental and control groups. Results: The statistical analysis showed that changes in skeletal measurements were similar between the surgery-first approach and conventional groups, according to each period. However, U1-SRP measurement showed statistically significant changes in surgery-first approach groups at postsurgical change (T1 to T2). Also, the mean treatment duration in the treatment group was 15.9 ± 5.48 months whereas that in the control group was 32.9 ± 14.05 months. Conclusion: In facial asymmetry patients, similar results were observed in the postoperative skeletal stability when 2-jaw surgery via surgery-first approach was compared with conventional 2-jaw surgery. However, significant lateral deviation of upper incisor midline was observed. In addition, a shorter average treatment duration was observed. To stabilize the unstable occlusion after surgery, increased wearing of the stent and proactive rubber guidance will be needed.

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Acknowledgement

I am very happy to submit my paper to "Maxillofacial Plastic and Reconsturctive Surgery." The title of my manuscript is "3-Dimensional Analysis of Skeletal Stability after 2-Jaw Surgery via Surgery-first Approach in Facial Asymmetry Patients." This study investigates the skeletal stability after 2-jaw surgery via surgery-first approach in facial asymmetry patients. In this study, we found that orthognathic surgery through the surgery-first approach showed similar results in terms of postoperative skeletal stability as the traditional method that is used after orthodontic treatment, but a significant lateral variation of the upper midline was observed. In addition, a shorter average treatment duration was observed. All of the authors including the corresponding author have read and approved the final manuscript. None of the authors had a personal or financial conflict of interest. This manuscript or any portion of this manuscript has not been previously published before and has not been submitted for publication elsewhere while under consideration for "MPRS." The paper has been written according to the guidelines provided by "MPRS." I would appreciate very much if you could review it for publication. We thank you in advance for your concern. Yours sincerely.

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