Accurate transfer of bimaxillary orthognathic surgical plans using computer-aided intraoperative navigation

Chen Chen; Ningning Sun; Chunmiao Jiang; Yanshan Liu; Jian Sun

Accurate transfer of bimaxillary orthognathic surgical plans using computer-aided intraoperative navigation

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Type: Academic journal

Author: Chen Chen (The Affiliated Hospital of Qingdao University) Ningning Sun (The Affiliated Hospital of Qingdao University) Chunmiao Jiang (The Affiliated Hospital of Qingdao University) Yanshan Liu (The Affiliated Hospital of Qingdao University) Jian Sun (The Affiliated Hospital of Qingdao University)

Journal: KOREAN ASSOCIATION OF ORTHODONTISTS THE KOREAN JOURNAL of ORTHODONTICS Vol.51 No.5 KCI Accredited Journals SCIE

Published: 2021.9

Pages: 321 - 328 (8page)

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Accurate transfer of bimaxillary orthognathic surgical plans using computer-aided intraoperative navigation

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Objective: To examine the accuracy of computer-aided intraoperative navigation (Ci-Navi) in bimaxillary orthognathic surgery by comparing preoperative planning and postoperative outcome. Methods: The study comprised 45 patients with congenital dentomaxillofacial deformities who were scheduled to undergo bimaxillary orthognathic surgery. Virtual bimaxillary orthognathic surgery was simulated using Mimics software. Intraoperatively, a Le Fort I osteotomy of the maxilla was performed using osteotomy guide plates. After the Le Fort I osteotomy and bilateral sagittal split ramus osteotomy of the mandible, the mobilized maxilla and the distal mandibular segment were fixed using an occlusal splint, forming the maxillomandibular complex (MMC). Realtime Ci-Navi was used to lead the MMC in the designated direction. Osteoplasty of the inferior border of the mandible was performed using Ci-Navi when facial symmetry and skeletal harmony were of concern. Linear and angular distinctions between preoperative planning and postoperative outcomes were calculated. Results: The mean linear difference was 0.79 mm (maxilla: 0.62 mm, mandible: 0.88 mm) and the overall mean angular difference was 1.20°. The observed difference in the upper incisor point to the Frankfort horizontal plane, midfacial sagittal plane, and coronal plane was < 1 mm in 40 cases. Conclusions: This study demonstrates the role of Ci-Navi in the accurate positioning of bone segments during bimaxillary orthognathic surgery. Ci-Navi was found to be a reliable method for the accurate transfer of the surgical plan during an operation.

#Orthognathic surgery #Virtual surgery planning #Computer-assisted surgery #Intraoperative navigation

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Xia JJ / 2007 / Accuracy of the computer-aided surgical simulation(CASS)system in the treatment of patients with complex craniomaxillofacial deformity : a pilot study / J Oral Maxillofac Surg 65:248~254

Xia JJ / 2009 / New clinical protocol to evaluate craniomaxillofacial deformity and plan surgical correction / J Oral Maxillofac Surg 67:2093~2106

Hsu SS / 2013 / Accuracy of a computeraided surgical simulation protocol for orthognathic surgery : a prospective multicenter study / J Oral Maxillofac Surg 71:128~142

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Sharifi A / 2008 / How accurate is model planning for orthognathic surgery / Int J Oral Maxillofac Surg 37:1089~1093

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