Finding the Ledge: Sagittal Analysis of Bony Landmarks of the Orbit
| Autor: | Karlien Seubring, Gertjan Mensink, Barbara S. Muller, Jan E. Bergsma, Alfred G. Becking, Peter J.J. Gooris, Leander Dubois, Maaike F.E. van den Ham |
|---|---|
| Přispěvatelé: | Oral and Maxillofacial Surgery, MKA AMC (ORM, ACTA), Maxillofacial Surgery (AMC) |
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Infraorbital margin Adolescent genetic structures Infraorbital foramen Young Adult 03 medical and health sciences 0302 clinical medicine Reference Values medicine Humans 030223 otorhinolaryngology Process (anatomy) Aged Retrospective Studies Aged 80 and over Palatine bone Optic canal business.industry 030206 dentistry Anatomy Middle Aged eye diseases Sagittal plane medicine.anatomical_structure Otorhinolaryngology Superior orbital fissure Female Surgery sense organs Anatomic Landmarks Oral Surgery Tomography X-Ray Computed business Orbit Orbit (anatomy) |
| Zdroj: | Journal of oral and maxillofacial surgery, 75(12), 2613-2627. W.B. Saunders Ltd Gooris, P J J, Muller, B S, Dubois, L, Bergsma, J E, Mensink, G, van den Ham, M F E, Becking, A G & Seubring, K 2017, ' Finding the ledge : Sagittal analysis of bony landmarks of the orbit ', Journal of Oral and Maxillofacial Surgery, vol. 75, no. 12, pp. 2613-2627 . https://doi.org/10.1016/j.joms.2017.07.156 Journal of Oral and Maxillofacial Surgery, 75(12), 2613-2627. W.B. Saunders Ltd |
| ISSN: | 0278-2391 |
| DOI: | 10.1016/j.joms.2017.07.156 |
| Popis: | Purpose: This study determined the average distances and angles between anatomic landmarks within the orbit, with an emphasis on localization of the orbital process of the palatine bone. This information will help the surgeon with treatment planning and surgical procedures. Patients and Methods: Four anatomic landmarks were identified retrospectively on computed tomograms of 100 adult Caucasian patients (50 men and 50 women): the top of the infraorbital margin superior to the infraorbital foramen (point A), the top of the orbital process of the palatine bone (point B), the anteriormost bony portion of the superior orbital fissure (point C), and the ventrolateral aspect of the bony entrance of the optic canal (point D). The distances between these points were measured, as were the angle between the medial wall of the orbit and a line connecting points A to D at the level of the optic nerve. Results: The mean distances between the orbital rim (point A) and the orbital process of the palatine bone (point B) were 33.8 mm in men and 32.7 mm in women. Men had markedly larger bony orbits than women; however, women had a larger angle than men for the 2 orbits. Conclusion: Obtaining these measurements preoperatively can enable a safer and more predictable surgical approach to the orbit, which can help lower the risk of damaging important neighboring structures. A preformed reconstruction plate can be manufactured or a standard reconstruction plate can be customized according to these measurements; during reconstruction, they also can help adequately localize the posterior ledge, specifically the orbital process of the palatine bone. These 2 aspects could ensure a more precise reconstruction of the orbital floor. |
| Databáze: | OpenAIRE |
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