Infraorbital margin: Difference between revisions

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'''Infraorbital margin''' is a term used in [[anatomy]] to describe a specific part of the [[human skull]]. It refers to the lower edge of the [[eye socket]] or [[orbit (anatomy)|orbit]], which is formed by the maxilla and the zygomatic bone.
{{Short description|Anatomical feature of the skull}}
{{Anatomy}}


==Etymology==
==Infraorbital margin==
The term "infraorbital" comes from the Latin words "infra", meaning below, and "orbital", referring to the orbit or eye socket. "Margin" refers to the edge or border of a structure.
[[File:Infraorbital_margin.PNG|thumb|right|Diagram showing the infraorbital margin]]
The '''infraorbital margin''' is a prominent anatomical feature of the human skull. It forms the lower boundary of the [[orbit (anatomy)|orbit]], which is the bony cavity that contains the [[eye]] and its associated structures. The infraorbital margin is an important landmark in both clinical and surgical anatomy.


==Anatomy==
==Anatomy==
The infraorbital margin is part of the [[facial skeleton]] and is formed by two bones: the [[maxilla]] and the [[zygomatic bone]]. The maxilla, or upper jawbone, forms the majority of the infraorbital margin, while the zygomatic bone, or cheekbone, forms the lateral part.  
The infraorbital margin is composed of two bones: the [[maxilla]] and the [[zygomatic bone]]. The maxilla forms the medial part of the margin, while the zygomatic bone forms the lateral part. These bones meet at the [[zygomaticomaxillary suture]], which is located near the midpoint of the infraorbital margin.


The infraorbital margin is an important anatomical landmark as it is the location of the [[infraorbital foramen]], a small hole through which the infraorbital nerve and blood vessels pass. This nerve provides sensation to the lower eyelid, upper lip, and part of the nasal cavity.
===Maxilla===
The [[maxilla]] is the upper jawbone and plays a crucial role in forming the roof of the mouth, the floor of the nose, and the floor of the orbit. The infraorbital margin is part of the maxillary bone's contribution to the orbit.
 
===Zygomatic bone===
The [[zygomatic bone]], also known as the cheekbone, contributes to the lateral wall and floor of the orbit. It articulates with the maxilla at the infraorbital margin, providing structural support to the face.


==Clinical significance==
==Clinical significance==
Due to its location, the infraorbital margin can be affected by various medical conditions and injuries. Fractures of the infraorbital margin are common in facial trauma and can lead to complications such as numbness or pain in the areas supplied by the infraorbital nerve.  
The infraorbital margin is a key landmark in various medical procedures. It is often used as a reference point in [[facial trauma]] assessment and reconstructive surgery. The infraorbital foramen, located just below the margin, is an important site for the passage of the [[infraorbital nerve]] and vessels, which supply sensation to the midface.


In addition, the infraorbital margin is often involved in surgical procedures involving the orbit or maxilla, such as [[orbital decompression]] for [[thyroid eye disease]] or [[maxillectomy]] for oral cancer.
==Surgical considerations==
In [[orbital surgery]], the infraorbital margin is a critical landmark for accessing the orbital floor. Surgeons must be cautious to avoid damaging the infraorbital nerve during procedures involving this area.


==Related terms==
==Related pages==
* [[Infraorbital foramen]]
* [[Orbit (anatomy)]]
* [[Infraorbital nerve]]
* [[Maxilla]]
* [[Maxilla]]
* [[Zygomatic bone]]
* [[Zygomatic bone]]
* [[Orbit (anatomy)|Orbit]]
* [[Infraorbital nerve]]


[[Category:Anatomy]]
[[Category:Skull]]
[[Category:Skull]]
{{stub}}

Latest revision as of 05:14, 16 February 2025

Anatomical feature of the skull


Infraorbital margin[edit]

Diagram showing the infraorbital margin

The infraorbital margin is a prominent anatomical feature of the human skull. It forms the lower boundary of the orbit, which is the bony cavity that contains the eye and its associated structures. The infraorbital margin is an important landmark in both clinical and surgical anatomy.

Anatomy[edit]

The infraorbital margin is composed of two bones: the maxilla and the zygomatic bone. The maxilla forms the medial part of the margin, while the zygomatic bone forms the lateral part. These bones meet at the zygomaticomaxillary suture, which is located near the midpoint of the infraorbital margin.

Maxilla[edit]

The maxilla is the upper jawbone and plays a crucial role in forming the roof of the mouth, the floor of the nose, and the floor of the orbit. The infraorbital margin is part of the maxillary bone's contribution to the orbit.

Zygomatic bone[edit]

The zygomatic bone, also known as the cheekbone, contributes to the lateral wall and floor of the orbit. It articulates with the maxilla at the infraorbital margin, providing structural support to the face.

Clinical significance[edit]

The infraorbital margin is a key landmark in various medical procedures. It is often used as a reference point in facial trauma assessment and reconstructive surgery. The infraorbital foramen, located just below the margin, is an important site for the passage of the infraorbital nerve and vessels, which supply sensation to the midface.

Surgical considerations[edit]

In orbital surgery, the infraorbital margin is a critical landmark for accessing the orbital floor. Surgeons must be cautious to avoid damaging the infraorbital nerve during procedures involving this area.

Related pages[edit]