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Anterior lacrimal crest

Bony projection of the frontal process of the maxilla

Field	Value
Name	Anterior lacrimal crest
Latin	crista lacrimalis anterior
System	skeletal	PartOf=maxilla

The anterior lacrimal crest is a bony projection on the frontal process of the maxilla. It creates the lateral margin of the lacrimal sac fossa and is continuous with the orbital margin. The medial palpebral ligament is attached to anterior lacrimal crest. It is an important structure to avoid damaging during rhinoplasty.

Structure

The anterior lacrimal crest is a bony projection on the frontal process of the maxilla in the skull. It reaches the junction between the maxilla and the lacrimal bone.

At its junction with the orbital surface is a small tubercle, the lacrimal tubercle, which serves as a guide to the position of the lacrimal sac.

The anterior lacrimal crest is much thicker and stronger than the posterior lacrimal crest. It is one of the thickest parts of the orbit. It is nearly always quite prominent, whilst the posterior lacrimal crest may be less prominent in some people.

Relations

The lacrimal sac is directly behind the anterior lacrimal crest, which protects it as part of the fossa for the lacrimal sac.

Function

The anterior lacrimal crest is the site of insertion of the medial palpebral ligament. Some consider this a tendon of the orbicularis oris muscle. The anterior lacrimal crest also protects the lacrimal sac.

Clinical significance

Avulsion

The anterior lacrimal crest may be vulnerable to an avulsion fracture due to its connection to the medial palpebral ligament.

Rhinoplasty

The anterior lacrimal crest is vulnerable to damage during osteotomy performed during rhinoplasty, a common plastic surgery. It lies approximately 5 mm from the osteotomy incision line.

Additional images

File:Slide2gre.JPG|Cranium. Anterior lacrimal crest.Lacrimal bone.

References

(1983-03-01). "New concepts of the anatomy of the lacrimal apparatus". Anatomia Clinica.
Sachs, Michael Evan. (1984). "Lacrimal system injury secondary to cosmetic rhinoplasty". Ophthalmic Plastic and Reconstructive Surgery.
(April 2014). "Anatomic study of the lacrimal fossa and lacrimal pathway for bypass surgery with autogenous tissue grafting". [[Indian Journal of Ophthalmology]].
Stranc, M. F.. (1970). "The pattern of lacrimal injuries in naso-ethmoid fractures". British Journal of Plastic Surgery.
(October 1989). "The lacrimal fossa in Indians.". [[Journal of Anatomy]].
(2020-01-01). "3.4 - Ocular Considerations: Ectropion, Entropion, Blink, Ptosis, Epiphora". Elsevier.
(2019-10-01). "Radiological assessment of the lateral osteotomy line–lacrimal system distance on three-dimensional models". Journal of Cranio-Maxillofacial Surgery.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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