Topographical CT-data analysis of the human orbital floor

Metzger, Marc Christian; Schön, Ralf; Tetzlaf, R.; Weyer, N.; Rafii, Amir; Gellrich, N.‐C.; Schmelzeisen, Rainer

doi:10.1016/j.ijom.2006.07.013

Cited by 49 publications

(36 citation statements)

References 64 publications

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“…[37][38][39][40][41][42][43] The computer-aided surgery (CAS) navigation system can further improve the outcome of surgical intervention. In traditional maxillofacial surgery, due to the limited exposure of surgical site, the surgeons cannot see directly the operative site and assess immediately whether proper bony reduction is achieved during operation.…”

Section: Computer Applicationsmentioning

confidence: 99%

The management of naso-orbital-ethmoid (NOE) fractures

Wei

Tang

Liu

et al. 2015

Chinese Journal of Traumatology

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The bony naso-orbital-ethmoid (NOE) complex is a 3-dimensional delicate anatomic structure. Damages to this region may result in severe facial dysfunction and malformation. The management and optimal surgical treatment strategies of NOE fractures remain controversial. For a patient with NOE trauma, doctors should perform comprehensive clinical examination and radiographic analysis to assess the type and extent of fracture. The results of assessment will assist doctors to make a patient-specific program for the sake of reducing post-operation complications and restoring normal appearance and function as much as possible. This review focuses on the advancement of management of NOE fractures including symptoms, classifications, diagnosis, approaches, treatment and new techniques in this field.Due to the naso-orbital-ethmoid (NOE) complex's intricate anatomy, the fracture in this region has been one of the most challenging to manage in maxillofacial trauma. The NOE complex is a 3-dimensional delicate anatomic structure. Damage to any structure in this region, even minimal, is quite likely to result in the facial function and appearance abnormal. M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPTFurthermore, this complex structure has a compact relationship with the brain and eyes, because it separates the nasal, orbital cavities from cranial cavity. Therefore, as long as the fracture of the region is suspected, a thorough physical examination and radiographic assessment, such as 2-dimensional (2D) CT and 3-dimensional (3D) CT, must be performed to assess the type and extent of fracture after achieving the stable vital signs.At present, different types of approaches for exposure have been discussed, such as midfacial degloving and endoscopic approach, as well as management of the NOE fracture, such as bone tissue engineering. However, every procedure has its advantages and disadvantages. According to individual injures, the surgeon should select the patient-specific treatment to restore the normal facial function and appearance. This review will discuss the advancement in the field of NOE fracture management. NOE anatomy Bony structure: the NOE complex consists of the nasal bones, frontal process of the maxilla, nasal process of the frontal bone, lacrimal bone, lamina papyracea, ethmoid bone, sphenoid bone and nasal septum, which separate the nasal, orbital cavities from cranial cavity. 1,2 The medial orbital wall is made up of the lacrimal bone and the lamina papyracea of the ethmoid where blowout fracture is easy to occur (Figure 1). 1 Medial canthal tendon (MCT): MCT is the pivotal soft tissue in NOE area, which supports the canthus, enables proper apposition between the eyelid and the globe, and performs as the lacrimal pump. 2 However, there are many controversies on the anatomy of MCT. The main controversy is on the number of the tendon's limbs. Some scholars referred that it had three limbs: anterior, superior, posterior, 2 some others argued that the superior limb did not exist. 3 Furthermore, some report...

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Section: Computer Applicationsmentioning

confidence: 99%

The management of naso-orbital-ethmoid (NOE) fractures

Wei

Tang

Liu

et al. 2015

Chinese Journal of Traumatology

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“…The orbital inferior wall consists of the orbital part of the maxilla, the orbital process of the zygomatic bone, and the orbital process of the palatine bone [1] . Orbital blow-out fractures are one of the most common ocular traumas.…”

Section: Introductionmentioning

confidence: 99%

“…Blow-out fractures frequently occur in the thinnest area of the orbital wall [2] . CT is the diagnostic imaging method of choice for the evaluation of orbital fractures [1] . Several studies have addressed and evaluated the morphology of the orbit using CT.…”

Section: Introductionmentioning

confidence: 99%

Role of Inferior Orbital Wall Morphologic Properties in Isolated Orbital Blow-Out Fracture

Park¹,

Lew²,

Lee³

2011

Ophthalmic Res

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Purpose: To compare inferior orbital wall morphology between isolated inferior and medial orbital wall fracture patients. Methods: The morphologic properties of patients with isolated blow-out fractures involving the medial wall or inferior wall treated from August 2004 to August 2009 were reviewed. The cross-sectional area, thickness, gradient, and curvature of the inferior wall were measured via orbital CT in the opposite non-traumatized eye. Results: Patients with isolated inferior wall fractures (n = 77) and isolated medial wall fractures (n = 78) evidenced no differences in sex, age, etiology of trauma, laterality of trauma, and associated concomitant intraocular injuries. The cross-sectional area, thickness, and gradient of the inferior wall did not differ significantly between the 2 groups. However, the coefficient of curvature was significantly greater in patients with inferior wall fracture than in patients with medial wall fracture (0.016 ± 0.006 vs. 0.006 ± 0.002, respectively; p = 0.000). Conclusion: Patients with more convex and steep inferior walls are more likely to incur isolated inferior wall fractures than isolated medial wall fractures.

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“…[17][18][19][20][21][22][23][24][25][26][27][28][29][30] The method of displaying imaging data is useful in observing areas of the body previously not easily visualized. This has increased competition among manufacturers of CT volume rendering software, leading to recent technological advances.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional reconstruction of a fibro-osseous lesion using binary images transformed from histopathological images

Araki

Kawashima²,

Matsumoto³

et al. 2010

Dentomaxillofacial Radiology

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The aim of this report was to introduce a new method of three-dimensional (3D) reconstruction for fibro-osseous lesions (FOLs) using binary images transformed from histopathological images and to describe its usefulness. A sample of multiconfluent FOL was used (one of the five types of FOL according to a radiographic classification) which was diagnosed histopathologically as ossifying fibroma. Approximately 30 pathological images were assembled into a composite image of the slide using Tiling Boutique software version 3 for Windows (Sanyo Electric, Osaka, Japan). The tiling images were transformed into 8-bit scale images and then into binary images using ImageJ software ver.1.37 (National Institutes of Health, Bethesda, MD). These images were used for 3D reconstruction using ImageJ software. Images were loaded at the same matrix size and were reconstructed into layers of two-dimensional image stacks, adjusted so that contiguous images were aligned based on their centre points, and arranged with long axes horizontal. 3D findings aided the visual understanding of morphological features in the lesion. The 3D reconstruction can be displayed with arbitrary rotation. In this case, the 3D reconstruction, using Real Image software version 4.01 for Windows (KGT, Tokyo, Japan), was created from an arbitrary section. This allowed us to determine the pattern of calcification between groups of connected osteoids and to compare the internal structure of such lesions that are not visible on histopathological findings. Differentiation of features was even more pronounced with a two colour display indicating fibrous connective tissue and osteoid tissue. A 3D reconstruction of a multiconfluent ossifying fibroma was created using binary images transformed from histopathological images. The quality of the images depends above all on the functionality of the image-processing software. Comparison of each pattern of FOL might allow more simple assessment of the morphological features of FOLs.

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Topographical CT-data analysis of the human orbital floor

Cited by 49 publications

References 64 publications

The management of naso-orbital-ethmoid (NOE) fractures

The management of naso-orbital-ethmoid (NOE) fractures

Role of Inferior Orbital Wall Morphologic Properties in Isolated Orbital Blow-Out Fracture

Three-dimensional reconstruction of a fibro-osseous lesion using binary images transformed from histopathological images

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