Cases
Osteoblastoma of left maxilla, Use of Stereolithography in a CMF Oncology.
Patient V., ID 1099, case presented by Prof. Timofeev A.A. from Kiev Medical Academy of Postgraduate Education, Kiev, Ukraine.
a. A 46 year's female was seen in the Univ. clinic of Kiev with osteoblastoma of the posterior part of left alveolar ridge of maxilla. Front view of 3D-reconstruction of CT dataset. Tumor tissues were segmentated into separate mask.
b. Bottom view of 3D-reconstruction. Ovoid tumor with precise contours, there's a cavity inside. X-ray density is about 20-56 HU, dimensions: 21x23x22 mm. Tumor is deforming maxilla sinus, but not penetrating.
c. All teeth starting from 13 were lost. The root of #13 positioned in the center of tumor cavity. Tissue segmentation and 3D-reconstruction was performed in Mimics 7.3.
d. Tumor tissues were segmentated into separate mask (bottom view) for colouring.
e. RP model created from segmentation masks (bottom view).
f. RP model (front view).
Patient was successfully operated by prof. A.Timofeev in CMF Surgery clinic of Kiev Medical Academy of Postgraduate Education, Kiev, Ukraine.
CONCLUSION: The planning of the removing facial bone tumor could be enhanced by merging different procedures: 3D-reconstruction, advanced segmentation with different thresholds and direct control on stereolithographic models. This procedure increases the quality of the planning allowing to surgeon be ready for real situation in operation wound, preparing beforehand the exact shape of bone graft. Also stereolithographic model with coloured tumor's tissues can be excellent educational material for students.