Frontal process of maxilla

Infobox Bone
Name = Frontal process of maxilla
Latin = processus frontalis maxillae
GraySubject = 38
GrayPage = 161


Caption = Cartilages of the nose. Side view. (Frontal process of maxilla visible at center.)


Caption2 = Articulation of nasal and lacrimal bones with maxilla. (Frontal process visible at top center.)
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The frontal process of the maxilla (nasal process) is a strong plate, which projects upward, medialward, and backward, by the side of the nose, forming part of its lateral boundary.

Its "lateral surface" is smooth, continuous with the anterior surface of the body, and gives attachment to the Quadratus labii superioris, the Orbicularis oculi, and the medial palpebral ligament.

Its "medial surface" forms part of the lateral wall of the nasal cavity; at its upper part is a rough, uneven area, which articulates with the ethmoid, closing in the anterior ethmoidal cells; below this is an oblique ridge, the ethmoidal crest, the posterior end of which articulates with the middle nasal concha, while the anterior part is termed the agger nasi; the crest forms the upper limit of the atrium of the middle meatus.

The "upper border" articulates with the frontal bone and the "anterior" with the nasal; the "posterior border" is thick, and hollowed into a groove, which is continuous below with the lacrimal groove on the nasal surface of the body: by the articulation of the medial margin of the groove with the anterior border of the lacrimal a corresponding groove on the lacrimal is brought into continuity, and together they form the lacrimal fossa for the lodgement of the lacrimal sac.

The lateral margin of the groove is named the anterior lacrimal crest, and is continuous below with the orbital margin; 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.

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External links

* - "Osteology of the Skull: The Maxilla"
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