The Precise Midline Positioning Instrument for Le Fort I Osteotomy
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Updated: Feb 2, 2026

Picometer-Precision Atomic Position Tracking through Electron Microscopy
Published on: July 3, 2021
Xiumei Sun1, Yanju Xiao2, Guomin Wu2
1Department of Orthodontics.
Abstract:
To reduce the deviations in the horizontal direction of posterior maxilla during the maxilla Le Fort I osteotomy, the authors develop and validate the precise midline positioning instrument for Le Fort I osteotomy, which can guide the precise relocation of the truncated maxillary bone segment. The patent application for the precise midline positioning instrument for Le Fort I osteotomy is already submitted (patent no: 201711245533.6, China). The accuracy of Le Fort I osteotomy can be improved significantly, because of the amplification effect of this patent on the rotation/micro-movement of the posterior maxilla in all directions to achieve the precise movement and pairing of the maxillary bone segment. And this method is simple, efficient, and laborsaving.
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