TY - JOUR
T1 - Virtual reconstruction of midface defects using statistical shape models
AU - Semper-Hogg, Wiebke
AU - Fuessinger, Marc Anton
AU - Schwarz, Steffen
AU - Ellis, Edward
AU - Cornelius, Carl Peter
AU - Probst, Florian
AU - Metzger, Marc Christian
AU - Schlager, Stefan
N1 - Publisher Copyright:
© 2016
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Purpose This study evaluates the accuracy of a statistical shape model (SSM) for virtual fracture reconstruction of the lateral midface. Materials and methods A uniform bony defect of the right zygoma was created. A virtual reconstruction was performed by using the standard procedure of mirroring the unaffected to the affected side (Group I) and by using the statistical model based on 178 pathologically unaffected CT scans (Group II). The accuracy of the statistical shape model was evaluated in comparison to the present mirroring protocol. The reconstructed region was compared with the original bone evaluating the mean deviation of both surfaces. Results All zygomas could be reconstructed with all methods. On the affected side the mean deviation was 1.10 mm ± 0.23 mm in group I and 0.85 mm ± 0.26 mm in group II. The differences between the groups were significant. Conclusion SSM offers a more precise reconstruction of midface defects than mirroring procedures. As an additional element SSM could automatize the CAS workflow in many respects.
AB - Purpose This study evaluates the accuracy of a statistical shape model (SSM) for virtual fracture reconstruction of the lateral midface. Materials and methods A uniform bony defect of the right zygoma was created. A virtual reconstruction was performed by using the standard procedure of mirroring the unaffected to the affected side (Group I) and by using the statistical model based on 178 pathologically unaffected CT scans (Group II). The accuracy of the statistical shape model was evaluated in comparison to the present mirroring protocol. The reconstructed region was compared with the original bone evaluating the mean deviation of both surfaces. Results All zygomas could be reconstructed with all methods. On the affected side the mean deviation was 1.10 mm ± 0.23 mm in group I and 0.85 mm ± 0.26 mm in group II. The differences between the groups were significant. Conclusion SSM offers a more precise reconstruction of midface defects than mirroring procedures. As an additional element SSM could automatize the CAS workflow in many respects.
KW - Computer-assisted surgery (CAS)
KW - Fracture reconstruction
KW - Midface defect
KW - Statistical shape model (SSM)
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U2 - 10.1016/j.jcms.2016.12.020
DO - 10.1016/j.jcms.2016.12.020
M3 - Article
C2 - 28202219
AN - SCOPUS:85011982270
SN - 1010-5182
VL - 45
SP - 461
EP - 466
JO - Journal of Cranio-Maxillofacial Surgery
JF - Journal of Cranio-Maxillofacial Surgery
IS - 4
ER -