Mandibular Fossa - Wikipedia

Depression in the temporal bone that articulates with the mandible Not to be confused with glenoid fossa.

Mandibular fossa
Left temporal bone. Outer surface. (Mandibular fossa labeled at left, third from the top.)
Base of skull. Inferior surface. (Mandibular fossa labeled at center left. Temporal bone is pink.)
Details
Part of	Temporal bone
System	Skeletal
Identifiers
Latin	fossa mandibularis
TA98	A02.1.06.071
TA2	712
FMA	75313
Anatomical terms of bone[edit on Wikidata]

The mandibular fossa, also known as the glenoid fossa in some dental literature, is the depression in the temporal bone that articulates with the mandible.

Structure

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In the temporal bone, the mandibular fossa is bounded anteriorly by the articular tubercle and posteriorly by the tympanic portion of the temporal bone, which separates it from the external acoustic meatus. The fossa is divided into two parts by a narrow slit, the petrotympanic fissure (Glaserian fissure). It is concave in shape to receive the condyloid process of the mandible.[1]

Development

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The mandibular fossa develops from condylar cartilage. This may be stimulated by SOX9 or ALK2, as has been seen in mouse models.[2]

Function

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The condyloid process of the mandible articulates with the temporal bone of the skull at the mandibular fossa.[3][4]

Clinical significance

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Problems with morphogenesis during embryonic development can lead to the mandibular fossa not forming.[2] This may be caused by mutations to SOX9 or ALK2.[2]

If the mandibular fossa is very shallow, this can cause problems with the strength of the temporomandibular joint.[5] This can lead to easy subluxation of the joint and trismus (lock jaw).[5] Deformation of the mandibular fossa, often part of temporomandibular dysplasia, causes similar problems in dogs.[6][7] This may resolve spontaneously, or require surgery.[7]

History

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The mandibular fossa is also known as the glenoid fossa in some dental literature.[1][8]

Other animals

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The mandibular fossa is a feature of the skulls of various other animals, including dogs.[6]

See also

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• Temporomandibular joint

References

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This article incorporates text in the public domain from page 140 of the 20th edition of Gray's Anatomy (1918)

1. ^ a b Mehta, Noshir R.; Scrivani, Steven J.; Maciewicz, Raymond (2008). "25 - Dental and Facial Pain". Raj's Practical Management of Pain (4th ed.). Mosby. pp. 505–527. doi:10.1016/B978-032304184-3.50028-5. ISBN 978-0-323-04184-3.
2. ^ a b c Hinton, Robert J.; Jing, Junjun; Feng, Jian Q. (2015). "Four - Genetic Influences on Temporomandibular Joint Development and Growth". Current Topics in Developmental Biology. Vol. 115. Elsevier. pp. 85–109. doi:10.1016/bs.ctdb.2015.07.008. ISBN 978-0-12-408141-3. ISSN 0070-2153. PMID 26589922.
3. ^ Lantz, Gary C.; Verstraete, Frank J. M. (2012). "33 - Fractures and luxations involving the temporomandibular joint". Oral and Maxillofacial Surgery in Dogs and Cats. Saunders. pp. 321–332. doi:10.1016/B978-0-7020-4618-6.00033-6. ISBN 978-0-7020-4618-6.
4. ^ Willard, V. P.; Zhang, L.; Athanasiou, K. A. (2011). "5.517 - Tissue Engineering of the Temporomandibular Joint". Comprehensive Biomaterials. Vol. 5. Elsevier Science. pp. 221–235. doi:10.1016/B978-0-08-055294-1.00250-6. ISBN 978-0-08-055294-1.
5. ^ a b Lantz, Gary C. (2012). "55 - Temporomandibular joint dysplasia". Oral and Maxillofacial Surgery in Dogs and Cats. Saunders. pp. 531–537. doi:10.1016/B978-0-7020-4618-6.00055-5. ISBN 978-0-7020-4618-6.
6. ^ a b Jerram, Richard M. (2006-01-01). "97 - Fractures and Dislocations of the Mandible". Saunders Manual of Small Animal Practice (3rd ed.). Saunders. pp. 1037–1042. doi:10.1016/B0-72-160422-6/50099-1. ISBN 978-0-7216-0422-0.
7. ^ a b Kealy, J. Kevin; McAllister, Hester; Graham, John P. (2011-01-01). "5 - The Skull and Vertebral Column". Diagnostic Radiology and Ultrasonography of the Dog and Cat (5th ed.). Saunders. pp. 447–541. ISBN 978-1-4377-0150-0.
8. ^ Groell, R; Fleischmann, B (1999-03-01). "The pneumatic spaces of the temporal bone: relationship to the temporomandibular joint". Dentomaxillofacial Radiology. 28 (2): 69–72. doi:10.1038/sj/dmfr/4600414. ISSN 0250-832X. PMID 10522194 – via DMFR.

External links

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• Anatomy figure: 22:4b-07 at Human Anatomy Online, SUNY Downstate Medical Center
• Anatomy photo:27:st-0311 at the SUNY Downstate Medical Center

v t e Neurocranium of the skull
Occipital	Squamous part external Inion/External occipital protuberance Occipital bun External occipital crest Nuchal lines Suprainiac fossa planes Occipital Nuchal internal Cruciform eminence Internal occipital protuberance Internal occipital crest Groove for transverse sinus Lateral parts Condyle Condyloid fossa Condylar canal Hypoglossal canal jugular Jugular process Jugular tubercle Basilar part Pharyngeal tubercle Clivus Other Foramen magnum Basion Opisthion
Parietal	Parietal eminence Temporal line Parietal foramen Sagittal sulcus Sagittal keel Sagittal crest
Frontal	Squamous part Frontal suture Frontal eminence external Superciliary arches Glabella foramina Supraorbital foramen Brow ridge Foramen cecum Zygomatic process internal Sagittal sulcus Frontal crest Orbital part Ethmoidal notch Fossa for lacrimal gland Trochlear fovea Frontal sinus Frontonasal duct
Temporal	Squamous part Articular tubercle Suprameatal triangle Mandibular fossa Petrotympanic fissure Zygomatic process Mastoid part Mastoid foramen Mastoid process (Mastoid cells) Mastoid notch Occipital groove Sigmoid sulcus Mastoid antrum (Aditus) Petrous part Carotid canal Facial canal Hiatus Internal auditory meatus Cochlear aqueduct Stylomastoid foramen fossae Subarcuate fossa Jugular fossa canaliculi Inferior tympanic Mastoid Styloid process Petrosquamous suture (note: ossicles in petrous part, but not part of temporal bone) Tympanic part Suprameatal spine
Sphenoid	Surfaces Superior surface: Sella turcica Dorsum sellae Tuberculum sellae Hypophysial fossa Posterior clinoid processes Ethmoidal spine Chiasmatic groove Middle clinoid process Petrosal process Clivus Lateral surface: Carotid groove Sphenoidal lingula Anterior surface: Sphenoidal sinuses Great wings foramina Rotundum Ovale Vesalii Spinosum Spine Infratemporal crest Sulcus of auditory tube Small wings Superior orbital fissure Anterior clinoid process Optic canal Pterygoidprocesses fossae Pterygoid Scaphoid pterygoid plates Lateral Medial Pterygoid canal Hamulus Other Body Sphenoidal conchae
Ethmoid	Plates Cribriform plate Crista galli Olfactory foramina Perpendicular plate Surfaces Lateral surface Orbital lamina Uncinate process Medial surface Supreme nasal concha Superior nasal concha Superior meatus Middle nasal concha Middle meatus Labyrinth Ethmoid sinus ethmoidal foramina Posterior Anterior

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