Abstract
Background
Because of the limitation of specific preoperative design and surgical templates, orthognathic surgery and mandibular contour osteoplasty are generally performed in two stages. Three-dimensional printing technology has improved the accuracy of the surgery and results in good surgical predictability easily. This study aims to confirm the effectiveness, feasibility and precision of simultaneous mandibular contour osteoplasty and orthognathic surgery with the assistance of 3D printing technology.
Methods
Ten patients, who were diagnosed with mandibular hypertrophy and bimaxillary deformities, were included in the study. In addition to conventional orthognathic surgery, mandibular angle ostectomy, mandibular outer cortex grinding or mandibular border ostectomy was designed for mandibular hypertrophy. Optimal osteotomy lines and simulated surgeries were designed according the 3D printing model of the mandible. Then, surgical templates were made on the 3D printing model. No muscle excision was performed in any patient. Preoperative, predicted and postoperative measurements were taken, including the gonial angle (Ar–Go–Me) and the mandibular width (Go–Go).
Results
All the patients had a reposeful postoperative recovery, with no indication of obvious infection, facial paralysis, osteonecrosis or bone displacement. The gonial angle was improved from 110.3° ± 11.1 to 121.3° ± 2.9, and the mandibular width was improved from 117.5 mm ± 6.8 to 111.9 mm ± 4.2. The discrepancies between simulation and postoperation of the left gonial angle, the right gonial angle and the mandibular width were 0.56° ± 0.22, 0.65° ± 0.3 and 0.49 mm ± 0.43, respectively.
Conclusions
The results of our study illustrated the predictability, feasibility and reliability of simultaneous mandibular contour osteoplasty and orthognathic surgery with the assistance of 3D printing technology. Our technique could achieve functional improvement and an aesthetic profile at the same time.
Level of Evidence IV
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Acknowledgements
This study was funded by grants from the Committee of National Nature Science Foundation (No. 81400532) in China, Norman Bethune Program of Jilin University (No. 2015301), Fund Project of Jilin Health and Family Planning Commission (No. 2015Q017), Jilin University’s Outstanding Young Teacher Training Program (No. 419080500367), the Program for Fundamental Research of Jilin University (No. 450060491134) and the 13th Five-Year science and technology project of the Education Department of Jilin Province (No. 2016486).
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the hospital research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Xiao, Y., Sun, X., Wang, L. et al. The Application of 3D Printing Technology for Simultaneous Orthognathic Surgery and Mandibular Contour Osteoplasty in the Treatment of Craniofacial Deformities. Aesth Plast Surg 41, 1413–1424 (2017). https://doi.org/10.1007/s00266-017-0914-z
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DOI: https://doi.org/10.1007/s00266-017-0914-z