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Computer-assisted zygoma reconstruction with vascularized iliac crest bone graft
Ali Modabber1, Marcus Gerressen, Nassim Ayoub
1Department of Oral, Maxillofacial and Plastic Facial Surgery, RWTH Aachen University Hospital, Germany.
Background:
The reconstruction of zygoma is a challenge with regard to aesthetic and reconstructive demands.
Methods:
Pre-operative CT data were imported into specific surgical planning software. The mirror-imaging technique was used. A surgical guide transferred the virtual surgery plan to the operation site, whereby it fitted uniquely to the iliac donor site. A postoperative CT scan was obtained for comparing the actual postoperative graft position and shape with the pre-operative virtual simulation.
Results:
A mean difference of 0.71 mm (SD ± 1.42) for the shape analysis and 3.53 mm (SD ± 3.14) for the graft position was determined. The calculation of the closest point distance showed a surface deviation of < 2 mm for the shape analysis with 83.6% of values and for the graft position with 35.7% of values.
Conclusion:
Virtual surgical planning is a suitable method for zygoma reconstruction with vascularized iliac crest bone graft, with good accuracy for restoring the three-dimensional anatomy.
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