Lacrimal bone

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~~Lacrimal~~The lacrimal bones are paired craniofacial bones forming anterior aspect of the medial orbital walls.

Gross anatomy

~~They~~The lacrimal bones have two surfaces and four borders.

The lateral orbital surface is divided by a vertical posterior lacrimal crest with an anterior fossa for lacrimal sac and lacrimal hamulus which with the maxilla forms the upper orifice of the nasolacrimal canal.The medial nasal surface is part of the middle meatus and meets the anterior ethmoidal air cells.

~~The~~ The anterior border articulates with the frontal process of the maxilla at lacrimo-maxillary suture, and the posterior border with the ethmoidal orbital plate. The superior border meets the frontal bone and inferior with the maxillary orbital surface.

Attachments

Orbicularis oculi muscle is attached to the orbital surface and posterior lacrimal crest.

Ossification

Lacrimal bone ossifies from a single centre which appears about twelfth week in the mesenchyme around the nasal capsule.

-<p>Lacrimal bones are paired craniofacial bones forming anterior aspect of the medial orbital walls. </p><p>They have two surfaces and four borders.</p><p>The lateral orbital surface is divided by a vertical <a href="/articles/posterior-lacrimal-crest">posterior lacrimal crest </a>with an anterior <a title="Lacrimal sac fossa" href="/articles/lacrimal-sac-fossa">fossa</a> for <a href="/articles/lacrimal-sac">lacrimal sac</a> and lacrimal hamulus which with the maxilla forms the upper orifice of the nasolacrimal canal.The medial nasal surface is part of the middle meatus and meets the anterior ethmoidal air cells.</p><p>The anterior border articulates with the frontal process of the maxilla at <a title="Lacrimo-maxillary suture" href="/articles/lacrimomaxillary-suture">lacrimo-maxillary suture</a>, and the posterior border with the ethmoidal orbital plate. The superior border meets the frontal bone and inferior with the maxillary orbital surface.</p><h5>Attachments</h5><p>Orbicularis oculi muscle is attached to the orbital surface and posterior lacrimal crest.</p><p> </p><h5>Ossification</h5><p>Lacrimal bone ossifies from a single centre which appears about twelfth week in the mesenchyme around the nasal capsule.</p>
+<p>The<strong> lacrimal bones</strong> are paired craniofacial bones forming anterior aspect of the medial orbital walls. </p><h4>Gross anatomy</h4><p>The lacrimal bones have two surfaces and four borders. The lateral orbital surface is divided by a vertical <a href="/articles/posterior-lacrimal-crest">posterior lacrimal crest </a>with an anterior <a href="/articles/lacrimal-sac-fossa">fossa</a> for <a href="/articles/lacrimal-sac">lacrimal sac</a> and lacrimal hamulus which with the maxilla forms the upper orifice of the nasolacrimal canal.The medial nasal surface is part of the middle meatus and meets the anterior ethmoidal air cells. The anterior border articulates with the frontal process of the maxilla at <a href="/articles/lacrimomaxillary-suture">lacrimo-maxillary suture</a>, and the posterior border with the ethmoidal orbital plate. The superior border meets the frontal bone and inferior with the maxillary orbital surface.</p><h5>Attachments</h5><p>Orbicularis oculi muscle is attached to the orbital surface and posterior lacrimal crest.</p><h5>Ossification</h5><p>Lacrimal bone ossifies from a single centre which appears about twelfth week in the mesenchyme around the nasal capsule.</p>

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