Application of maxillary osteotomy and positioning guide plates in orthognathic surgery
10.3760/cma.j.cn114453-20201209-00622
- VernacularTitle:上颌骨截骨及定位导板在正颌外科中的应用
- Author:
Tingyi GAO
1
;
Kai ZHANG
;
Dong WANG
;
Rui HAN
;
Zhenfei GUO
;
Zhaojun ZHAN
Author Information
1. 蚌埠医学院第一附属医院口腔颌面外科 233004
- Keywords:
Osteotomy, Le Fort;
Surgery, computer-assisted;
Orthognathic surgical procedures;
Imaging, three-dimensional;
Printing, three-dimensional;
Cephalometry;
Gui
- From:
Chinese Journal of Plastic Surgery
2021;37(7):777-783
- CountryChina
- Language:Chinese
-
Abstract:
Objective:The aim of this study was to explore the application of maxillary osteotomy plate and positioning guide plate in maxillary Le Fort Ⅰ osteotomy to eliminate the postoperative error caused by condylar displacement.Methods:Patients suffered from skeletal malocclusion and needed Le Fort Ⅰ osteotomy between January 2018 and November 2020 were selected from the Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital of Bengbu Medical College. All patients were scanned with 64 slice spiral CT. The DICOM format data were analyzed using the Simplant software to reconstruct the virtual three-dimensional model of the jaw before operation. Then, the measurement of indexes and the maxillary Le Fort Ⅰ osteotomy were carried out on the virtual three-dimensional model, respectively. 3D-printed osteotomy guide plate and positioning guide plate were used to determine the osteotomy line and the position of maxillary advancement. 3D-printed tooth supported occlusal plate was used to support the mandibular sagittal split and retraction. The differences of 10 indexes between the two groups (virtual operation and surgery) were analyzed by paired t test using SPSS 22.0. Results:A total of 8 patients (5 males and 3 females) needed maxillary Le Fort Ⅰ osteotomy aged from 18 to 39 years old were recorded. The deviation of age in these patients was 24.8. The 3D-printed guide plate and tooth supporting occlusal plate were positioned accurately in surgery. All the operations were successful with primary healing of the incision and stable occlusion, and without joint clicking. There was no significant difference on the 10 indexes between the groups of virtual operation and surgery ( P>0.05). Conclusions:The application of maxillary osteotomy plate and positioning guide plate can effectively and accurately control the three-dimensional movement of the maxilla and improve the precision of maxillary Le fort Ⅰ osteotomy in orthognathic surgery, making the surgical effect highly consistent with the preoperative design.
