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The Mirroring Technique: A Navigation-Based Method for Reconstructing a Symmetrical Orbit and Cranial Vault

Bruneau, Michaël MD, PhD*; Schoovaerts, Frédéric MSc*; Kamouni, Rachid DSc*; Dache, Stéphanie MD; De Witte, Olivier MD, PhD*; de Fontaine, Serge MD

doi: 10.1227/NEU.0b013e318282a4e3
Operative Technique: Editor's Choice
Editor's Choice

BACKGROUND: The reconstruction of orbital structures and the cranial vault curvature can be challenging after trauma or wide resections for tumors. Sophisticated methods have been developed recently, but these are resource- and time-consuming.

OBJECTIVE: We report the mirroring technique, which is an effective and costless application for navigation-guided reconstruction procedures.

METHODS: At the time of the reconstruction, high-resolution images are reloaded while forcing a left-right axial flip. The pointer subsequently enables a virtual 3-dimensional projection of the position of the contralateral normal anatomy.

RESULTS: This method was applied successfully in 2 cases of en plaque sphenoid wing meningiomas with secondary exophthalmia.

CONCLUSION: The mirroring technique represents an accurate method of outlining the contralateral normal anatomy onto the pathological side based on navigation guidance.

Departments of *Neurosurgery and

Plastic Surgery, Hôpital Erasme, Université Libre de Bruxelles ULB, Brussels, Belgium

Correspondence: Michaël Bruneau, MD, PhD, Erasme Hospital, Department of Neurosurgery, Route de Lennik, 808, 1070 Brussels, Belgium. E-mail:

Received May 12, 2012

Accepted November 27, 2012

Copyright © by the Congress of Neurological Surgeons