Abstract
The LeFort I osteotomy is standard for corrective repositioning of the maxilla, but
intraoperative, skull-related, three-dimensional repositioning of the maxilla remains
unsolved. Different ways of improving the accuracy of intraoperative, preoperatively
planned, skull-related, correcting movements have been described, including the measurement
of vertical maxillary shift, use of positioning devices (such as a face bow or a halo
frame), and computer-assisted navigation. Nevertheless, intraoperative three-dimensional
control of maxillary shift is not standard. Intraoperatively adjusted positioning
pins define an exactly reproducible skull-related position for a reference splint.
Skull-related repositioning of the maxilla after osteotomy can be done precisely in
combination with two further splints, each allowing for different, well-defined repositioning
of the reference splint in relation to the maxillary dental arch. The positioning
device can be inserted using the standard intraoral approaches of the Le Fort I osteotomy.
It does not result in further radiation exposure for the patient besides that usually
necessary for preoperative planning. Three-dimensional imaging and expensive, computer-assisted
navigational systems are not required. In contrast to previous procedures, the new
device allows for intraoperative, three-dimensional, skull-related repositioning of
the maxilla exactly according to the position planned preoperatively.
Keywords
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Article info
Publication history
Published online: November 24, 2011
Accepted:
November 1,
2011
Identification
Copyright
© 2011 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
