Research on the precision of virtual surgical planning in two⁃jaw orthognathic surgery
10.12016/j.issn.2096⁃1456.2020.01.005
- Author:
LIU Yanfei
1
,
2
,
3
;
LI Yun⁃feng
1
,
2
,
3
;
ZHU Songsong
1
,
2
,
3
Author Information
1. State Key Laboratory of Oral Diseases &
2. National Clinical Research Center for Oral Diseases &
3. Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University
- Publication Type:Journal Article
- Keywords:
virtual surgical planning;
dento⁃maxillofacial deformities;
orthognathic surgery;
bony segments re⁃
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2020;28(1):30-35
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To provide a clinical reference by evaluating the precision of virtual surgical planning in two⁃
jaw orthognathic surgery.
Methods :Thirty consecutive patients who required two⁃jaw orthognathic surgery were includ⁃
ed. A composite skull model was reconstructed using data from spiral computed tomography scan and surface scanning
of the dental arch. LeFort I osteotomy of the maxilla and bilateral sagittal split ramus osteotomy of the mandible were
simulated using Dolphin Imaging 11.7 Premium. Genioplasty was performed if indicated. Virtual plan was then trans⁃
ferred to operation room using 3D⁃printed surgical templates. Frankfort horizontal plane (FHP), midfacial plane (perpen⁃
dicular to the FHP through the nasion), and coronal plane (perpendicular to the FHP through the sella point) were the
selected three symmetry planes.Midpoint of the contact of the maxillary and mandibular central incisors (UI, LI), and
the mesio⁃buccal cusp of the first maxillary and mandibular molars (U6⁃R,U6⁃L, L6⁃R, L6⁃L) were the six chosen volu⁃metric landmarks. To calculate the linear difference and overall mean linear difference (mean difference of the distance
between UI, LI, U6⁃R, U6⁃L, L6⁃R, L6⁃L to FHP, midfacial and coronal plane) between simulated and postoperative
models, the distance between selected landmarks and symmetry planes was measured. To calculate the angular differ⁃
ence and overall mean angular difference, values of the angles constructed by the occlusal, palatal, and mandibular
plane to FHP and midfacial plane respectively were determined on simulated and postoperative models
Results:The
virtual surgical planning was successfully transferred to actual surgery with the help of 3D⁃printed surgical templates.
All patients were satisfied with the postoperative facial profile and occlusion. The overall mean linear difference was
0.81 mm (0.71 mm for maxilla and 0.91 mm for mandible); and the overall mean angular difference was 0.95° (the mean
angular difference relative to FHP was 1.10°, and that relative to midfacial plane was 0.83°)
Conclusion:Virtual sur⁃
gical planning facilitated the diagnosis, treatment planning, and precise bony segments repositioning in two⁃jaw orthog⁃
nathic surgery.
- Full text:虚拟手术设计在双颌正颌手术中的精准性研究.pdf
