Berger Moritz, Nova Igor, Kallus Sebastian, Ristow Oliver, Eisenmann Urs, Freudlsperger Christian, Seeberger Robin, Hoffmann Jürgen, Dickhaus Hartmut
Department of Oral and Maxillofacial Surgery, University Hospital Heidelberg, Heidelberg, Germany.
Institute of Medical Biometry and Informatics, University Hospital Heidelberg, Heidelberg, Germany.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2017 Mar;123(3):298-304. doi: 10.1016/j.oooo.2016.10.005. Epub 2016 Oct 14.
Inaccuracies in orthognathic surgery can be caused during face-bow registration, model surgery on plaster models, and intermaxillary splint manufacturing. Electromagnetic (EM) navigation is a promising method for splintless digitized maxillary positioning.
After performing Le Fort I osteotomy on 10 plastic skulls, the target position of the maxilla was guided by an EM navigation system. Specially implemented software illustrated the target position by real-time multistage colored three-dimensional imaging. Accuracy was determined by using pre- and postoperative cone beam computed tomography.
The high accuracy of the EM system was underlined by the fact that it had a navigated maxilla position discrepancy of only 0.4 mm, which was verified by postoperative cone beam computed tomography.
This preclinical study demonstrates a precise digitized approach for splintless maxillary repositioning after Le Fort I osteotomy. The accuracy and intuitive illustration of the introduced EM navigation system is promising for potential daily use in orthognathic surgery.
正颌外科手术中的误差可能出现在面弓记录、石膏模型上的模型手术以及颌间夹板制作过程中。电磁（EM）导航是一种有前景的无夹板数字化上颌定位方法。
对10个塑料颅骨进行Le Fort I截骨术后，通过EM导航系统引导上颌的目标位置。专门开发的软件通过实时多阶段彩色三维成像展示目标位置。使用术前和术后锥形束计算机断层扫描确定准确性。
EM系统的高精度体现在其引导的上颌位置差异仅为0.4毫米这一事实上，术后锥形束计算机断层扫描证实了这一点。
这项临床前研究展示了一种用于Le Fort I截骨术后无夹板上颌重新定位的精确数字化方法。所引入的EM导航系统的准确性和直观展示对于正颌外科手术的日常潜在应用很有前景。
