lacrimal bone


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Related to lacrimal bone: Vomer bone

lac′rimal bone`


n.
a skull bone extending from each orbit to the nasal region, greatly reduced in mammals.
[1850–55]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lacrimal bone - small fragile bone making up part of the front inner walls of each eye socket and providing room for the passage of the lacrimal ducts
bone, os - rigid connective tissue that makes up the skeleton of vertebrates
cranial orbit, eye socket, orbital cavity, orbit - the bony cavity in the skull containing the eyeball
References in periodicals archive ?
Anterior ethmoid cells pneumatize the lacrimal bone & the frontonasal process of the maxilla.
ciconia; in its fades nasalis, it fuses rostro-laterally with the lateral-caudal facet of the frontal and lacrimal bone region.
A Freer elevator was used to raise up the nasal mucosa to expose the axillary ridge (part of the frontal process of the maxillary bone) anterior to the lacrimal bone, and the tissue was resected using cutting forceps.
A deep fossa for the lacrimal sac was located on the orbital surface of lacrimal bone. The oval foramen was positioned in the caudal part of the pterygoid bone.
Though several intra-nasal pleomorphic adenomas have been described, to our knowledge this is the first reported case of a pleomorphic adenoma arising from the mucosa of lateral nasal wall over the lacrimal bone without invading the lacrimal sac.
They are extramural cells (not confined within the ethmoid bone) and extend anteriorly into the lacrimal bone. They are anterior to the anterior attachment of the middle turbinate to the skull base.
The ectethmoid bone (Ec, Figure 5) is slender and its dorsal portion (facies nasalis) (Pj1, Figures 5-9) is short laterally and there is no contact with the lacrimal bone. The ventral portion (facies orbitalis) (Pj2, Figures 5-14) has a ventral extremity that is rounded and broad and a lateral extremity that is concave because the ectethmoid is narrower between its projections.
Posteriorly, this process articulates with the lacrimal bone to form the anterior portion of the medial orbital wall.
The maximum contribution in the formation of the orbit was from frontal bone followed by the zygomatic and lacrimal bone. The interorbital distance in the present study was 7.81[+ or -]0.07 cm.
Chips of lacrimal bone is removed using side knife, then frontal process of maxilla is punched out using Kerrison's bone punch, lacrimal sac is fully exposed, for the exposure of upper of sac is sometimes drilling is required.