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CC BY-NC-ND 4.0 · Journal of Health and Allied Sciences NU 2011; 01(01/03): 50-53
DOI: 10.1055/s-0040-1703520
Short Communications

TEMPERO-MANDIBULAR JOINT: THE KINETICS OF ELEVATION & DEPRESSION

Arunachalam Kumar
Department of Anatomy, K.S. Hegde Medical Academy, Mangalore - 575 018
,
Ashwin Shetty
Department of Orthopaedics, K.S. Hegde Medical Academy, Mangalore - 575 018
,
Urvashi Shetty
P.G. Student, Department of Oral Pathology, A.B. Shetty Memorial Institute of Dental Sciences, Mangalore - 575 018
,
Savinaya Kumar
Department of Anatomy, K.S. Hegde Medical Academy, Mangalore - 575 018
,
Harsha C.
Department of Anatomy, K.S. Hegde Medical Academy, Mangalore - 575 018
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Abstract

The temperomandibular joint (TMJ) is a multiaxial ginlymoarthrodial synovial joint endowed with a capacity to perform a wide range of movements , primarily through its bicondylar mandibule freely articulating with a stationary (fixed) fossa of the squamous temporal. This short paper elaborates on an odd, yet possible, movement that can be performed by the joint: An illusory and paradoxical 'depression' that can result by a reversal in the roles of the two articulating bones, the mandible and the temporal. Whereas in classical depression, the TMJ utilizes two axises, the same joint during performance of the reversed articulation uses just a single axis to achieve an identical final outcome, separation of the alveolar ridges of two bones.

This paper here discusses the kinetics and articular dynamics that coordinate the plethora of performed or possible movements with special reference and a closer observation of the depression – elevation sequence.

Keywords

Temperomandibular joint - hinge - bicondylar - illusory depression - axis


Publication History

Article published online:
20 February 2020

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