The Temporomandibular Joint Through the Lens of Comparative Anatomy

Arzi, Boaz; Staszyk, Carsten

doi:10.1007/978-3-319-99915-9_3

Cited by 4 publications

(5 citation statements)

References 45 publications

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“…Despite its status as a mammalian identifier, the TMJ shows remarkable morphological and functional variations in different species, reflecting the great adaptive diversification of mammals in feeding mechanisms [ 16 ]. During evolution, the common features of the TMJ (such as modified hinge joint, fibrocartilaginous articular surfaces, and two synovial joint compartments separated by an articular disc) persisted mostly invariable, except for a few species [ 17 ]. The simple components of the TMJ present adaptations, both in form and function, to satisfy the needs of the species, such as feeding and communication [ 17 ].…”

Section: Temporomandibular Jointmentioning

confidence: 99%

“…During evolution, the common features of the TMJ (such as modified hinge joint, fibrocartilaginous articular surfaces, and two synovial joint compartments separated by an articular disc) persisted mostly invariable, except for a few species [ 17 ]. The simple components of the TMJ present adaptations, both in form and function, to satisfy the needs of the species, such as feeding and communication [ 17 ]. The evolutionary variants include adaptations in the orientation of the joint cavity from parasagittal (many rodents) to transverse (many carnivores), among other features [ 16 ].…”

Section: Temporomandibular Jointmentioning

confidence: 99%

“…It is the unique joint with a whole articular disc ( discus articularis ) that has developed owing to a slight articular surface incongruity [ 20 ]. However, in the cat, the temporomandibular joint is highly congruent [ 17 ] and the articular disc is very thin and poorly developed. According to Arredondo et al [ 21 ], it is attached around its entire periphery to the capsule, dividing the synovial cavity into two separate spaces—dorsal and ventral.…”

Section: Temporomandibular Jointmentioning

confidence: 99%

“…In the cat, the condyloid process formed by the caput mandibulae consists of a slender, transverse roller 13–15 mm wide with a diameter of 2–3 mm ( Figure 2 ). The axis of the articulated roller is oriented transversely at the line of the occlusal plane [ 17 ]. Caudally oriented, it presents a highly curved convexity medial to the mandibular body that narrows laterally and the outer end is often pointed [ 22 ].…”

Section: Temporomandibular Jointmentioning

confidence: 99%

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The Cat Mandible (I): Anatomical Basis to Avoid Iatrogenic Damage in Veterinary Clinical Practice

Lombardero

Alonso-Peñarando

Yllera

2021

Animals

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Cats are one of our favourite pets in the home. They differ considerably from dogs but are usually treated clinically as small dogs, despite some anatomical and physiological dissimilarities. Their mandible is small and has some peculiarities relative to the dentition (only three incisors, a prominent canine, two premolars and one molar); a conical and horizontally oriented condyle, and a protudent angular process in its ventrocaudal part. Most of the body of the mandible is occupied by the mandibular dental roots and the mandibular canal that protects the neurovascular supply: the inferior alveolar artery and vein, and the inferior alveolar nerve that exits the mandible rostrally as the mental nerves. They irrigate and innervate all the teeth and associated structures such as the lips and gingiva. Tooth roots and the mandibular canal account for up to 70% of the volume of the mandibular body. Consequently, when fractured it is difficult to repair without invading the dental roots or vascular structures. Gaining a comprehensive anatomical knowledge and good clinical practice (such as image diagnosis before and post-surgery) will help in the awareness and avoidance of iatrogenic complications in day-to-day feline clinical practice.

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Section: Temporomandibular Jointmentioning

confidence: 99%

Section: Temporomandibular Jointmentioning

confidence: 99%

Section: Temporomandibular Jointmentioning

confidence: 99%

Section: Temporomandibular Jointmentioning

confidence: 99%

See 2 more Smart Citations

The Cat Mandible (I): Anatomical Basis to Avoid Iatrogenic Damage in Veterinary Clinical Practice

Lombardero

Alonso-Peñarando

Yllera

2021

Animals

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“…In addition, a group of paired masticatory muscles is responsible for closing and opening of the mouth, with minimal mandibular lateral movement in dogs (i.e. laterotrusion) and no lateral movement in cats (Arzi and Staszyk, 2019;Arzi, 2020). Compared with man, translation (i.e.…”

Section: Introductionmentioning

confidence: 99%

Intra- and Extra-articular Features of Temporomandibular Joint Ankylosis in the Cat (Felis catus)

Zavodovskaya¹,

Vapniarsky²,

Garcia³

et al. 2020

Journal of Comparative Pathology

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Temporomandibular joint (TMJ) ankylosis is an uncommon clinical entity in human and veterinary medicine. However, the condition is severely debilitating and is life-limiting if not treated. This study sought to characterize the intra-and extra-articular features of naturally occurring TMJ ankylosis in cats. TMJs from clientowned cats (n ¼ 5) that underwent bilateral TMJ gap arthroplasty were examined and compared with TMJs from healthy, age-matched feline cadavers (n ¼ 2) by cone-beam computed tomography (CBCT), microcomputed tomography (mCT) and histologically. Features of bilateral intra-and extra-articular ankylosis compounded by degenerative joint lesions were identified radiographically and histologically in all affected cats. Features of TMJ 'true' ankylosis included variable intracapsular fibro-osseous bridging, degeneration of the disc and the articular surfaces, narrowing of the joint space and flattening of the condylar process of the mandible. Extra-articular features of TMJ ankylosis included periarticular bone formation and fibroosseous bridging between the mandible, zygomatic arch and coronoid process. In addition, subchondral bone loss or sclerosis, irregular and altered joint contours and irregularly increased density of the medullary bone characterized the degenerative changes of the osseous components of the TMJ. Complex radiological and histological features of both ankylosis and pseudoankylosis were identified that clinically manifested in complete inability to open the mouth.

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Anatomy

2022

Feline Dentistry

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The Temporomandibular Joint Through the Lens of Comparative Anatomy

Cited by 4 publications

References 45 publications

The Cat Mandible (I): Anatomical Basis to Avoid Iatrogenic Damage in Veterinary Clinical Practice

The Cat Mandible (I): Anatomical Basis to Avoid Iatrogenic Damage in Veterinary Clinical Practice

Intra- and Extra-articular Features of Temporomandibular Joint Ankylosis in the Cat (Felis catus)

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