Depression in the temporal bone that articulates with the mandible
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
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
The mandibular fossa develops from condylar cartilage. This may be stimulated by SOX9 or ALK2 , as has been seen in mouse models .[2]
Function
The condyloid process of the mandible articulates with the temporal bone of the skull at the mandibular fossa.[3] [4]
Clinical significance
Problems with morphogenesis during embryonic development can lead to the mandibular fossa not forming.[2] 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] 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] surgery .[7]
History
The mandibular fossa is also known as the glenoid fossa in some dental literature.[1] [8]
Other animals
The mandibular fossa is a feature of the skulls of various other animals, including dogs .[6]
This article incorporates text in the public domain from page 140 of the 20th edition of Gray's Anatomy (1918)
^ 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 ^ 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 . ^ 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 ^ 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 ^ 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 ^ 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 ((cite book )): CS1 maint: date and year (link )^ 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 ((cite book )): CS1 maint: date and year (link )^ 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. 
