Abstract
Traditional model surgery with facebow transfer is not very accurate. We aimed to
demonstrate that the Orthopilot™ Navigation System improves the accuracy of maxillary
repositioning during Le Fort I osteotomy. Thirty patients underwent Le Fort I osteotomy
alone or associated to sagittal split osteotomy. The maxilla positioning was done
in two phases. First, the maxilla was positioned with the traditional occlusal splint,
the position (“without Orthopilot™”) was recorded by the Orthopilot™. In the second
phase, the Orthopilot™ was used to improve positioning; and the final position (“with
Orthopilot™”) was recorded, after osteosynthesis. Positioning data were compared with
planned data. Positioning data with and without the Orthopilot™ were also compared.
Accuracy was classified in distinct classes with three major criteria (conformity,
non-conformity, failure) according to the discrepancies. Conformity rate was significantly
greater with the Orthopilot™ (2 without the Orthopilot™ compared with 8 with the Orthopilot™;
p = 0.01). The failure rate was significantly lower with the Orthopilot™ (18 without Orthopilot™
compared with 7 with the Orthopilot™; p = 0.002). Dispersions of discrepancies were usually lower in all directions with the
Orthopilot™. Navigation reduced the risk of discrepancy without cancelling it, especially
when large movements are planned. The Orthopilot™ therefore improved the accuracy
of traditional occlusal splint during Le Fort I osteotomy.
Keywords
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Article info
Publication history
Published online: July 06, 2020
Accepted:
June 8,
2020
Received:
December 13,
2019
Footnotes
☆This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Identification
Copyright
© 2020 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
