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Precision of posttraumatic primary orbital reconstruction using individually bent titanium mesh with and without navigation: a retrospective study.

Essig H, Dressel L, Rana M, Rana M, Kokemueller H, Ruecker M, Gellrich NC - Head Face Med (2013)

Bottom Line: Orbital volume of the unaffected side ranged from 26.6 ml±2.8 ml in male and 25.2 ml±2.6 ml in female (CT).Significant orbital enlargement was found in orbital fractures with involvement of the posterior third of the orbital floor and in comminuted fracture pattern.Reconstructed orbital volume ranged from 26.9±2.7 ml in male and 24.26±2.5 ml in female (CBCT). 3D Analysis of the color mapping showed minor deviations compared to the mirrored unaffected side.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Background: The aim of orbital wall reconstruction is to reestablish anatomically exact orbital volumes to avoid long-term complications. Navigation could facilitate complex reconstructions.

Methods: Quality of the orbital reconstruction (n=94) was measured based on (A) volume changes and (B) on 3D shape deviations compared to the unaffected side. Volume analysis included segmentation of the orbital cavity in the pre- and post-operative 3D data set (VoXim®, IVS Solutions, Germany), and shape analysis was performed by vector-based 3D tools (Comparison®, 3Dshape, Germany).

Results: Orbital volume of the unaffected side ranged from 26.6 ml±2.8 ml in male and 25.2 ml±2.6 ml in female (CT). Significant orbital enlargement was found in orbital fractures with involvement of the posterior third of the orbital floor and in comminuted fracture pattern. Reconstructed orbital volume ranged from 26.9±2.7 ml in male and 24.26±2.5 ml in female (CBCT). 3D Analysis of the color mapping showed minor deviations compared to the mirrored unaffected side.

Conclusion: Measurements demonstrate that even in comminuted orbital fractures true-to-original reconstruction is feasible.

No MeSH data available.


Related in: MedlinePlus

Image analysis in sagittal view (A) and coronal view (B), (C) pre-operative segmentation (CT scan), (D) both virtual segments, (E) intra-operative Navigation-assisted surgery using VoXim®, (F) post-operative control (CBCT-scan).
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Figure 1: Image analysis in sagittal view (A) and coronal view (B), (C) pre-operative segmentation (CT scan), (D) both virtual segments, (E) intra-operative Navigation-assisted surgery using VoXim®, (F) post-operative control (CBCT-scan).

Mentions: The volume of the orbital cavity was compared by segmentation based on the 3D data sets. Therefore we transferred DICOM-format CT and CBCT data sets to the software VoXim®. This software product allows for assessment of the patient’s individual anatomy in multiplanar and three-dimensional views (Figure 1). In three-dimensional reconstructions, volume data can be visualized by threshold value segmentation which figures objects with voxel values of a defined range and allows the measurement of defined subvolumes, by defining up to 8 segments and their independent movement.


Precision of posttraumatic primary orbital reconstruction using individually bent titanium mesh with and without navigation: a retrospective study.

Essig H, Dressel L, Rana M, Rana M, Kokemueller H, Ruecker M, Gellrich NC - Head Face Med (2013)

Image analysis in sagittal view (A) and coronal view (B), (C) pre-operative segmentation (CT scan), (D) both virtual segments, (E) intra-operative Navigation-assisted surgery using VoXim®, (F) post-operative control (CBCT-scan).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750456&req=5

Figure 1: Image analysis in sagittal view (A) and coronal view (B), (C) pre-operative segmentation (CT scan), (D) both virtual segments, (E) intra-operative Navigation-assisted surgery using VoXim®, (F) post-operative control (CBCT-scan).
Mentions: The volume of the orbital cavity was compared by segmentation based on the 3D data sets. Therefore we transferred DICOM-format CT and CBCT data sets to the software VoXim®. This software product allows for assessment of the patient’s individual anatomy in multiplanar and three-dimensional views (Figure 1). In three-dimensional reconstructions, volume data can be visualized by threshold value segmentation which figures objects with voxel values of a defined range and allows the measurement of defined subvolumes, by defining up to 8 segments and their independent movement.

Bottom Line: Orbital volume of the unaffected side ranged from 26.6 ml±2.8 ml in male and 25.2 ml±2.6 ml in female (CT).Significant orbital enlargement was found in orbital fractures with involvement of the posterior third of the orbital floor and in comminuted fracture pattern.Reconstructed orbital volume ranged from 26.9±2.7 ml in male and 24.26±2.5 ml in female (CBCT). 3D Analysis of the color mapping showed minor deviations compared to the mirrored unaffected side.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Background: The aim of orbital wall reconstruction is to reestablish anatomically exact orbital volumes to avoid long-term complications. Navigation could facilitate complex reconstructions.

Methods: Quality of the orbital reconstruction (n=94) was measured based on (A) volume changes and (B) on 3D shape deviations compared to the unaffected side. Volume analysis included segmentation of the orbital cavity in the pre- and post-operative 3D data set (VoXim®, IVS Solutions, Germany), and shape analysis was performed by vector-based 3D tools (Comparison®, 3Dshape, Germany).

Results: Orbital volume of the unaffected side ranged from 26.6 ml±2.8 ml in male and 25.2 ml±2.6 ml in female (CT). Significant orbital enlargement was found in orbital fractures with involvement of the posterior third of the orbital floor and in comminuted fracture pattern. Reconstructed orbital volume ranged from 26.9±2.7 ml in male and 24.26±2.5 ml in female (CBCT). 3D Analysis of the color mapping showed minor deviations compared to the mirrored unaffected side.

Conclusion: Measurements demonstrate that even in comminuted orbital fractures true-to-original reconstruction is feasible.

No MeSH data available.


Related in: MedlinePlus