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Tuesday, 9 July 2013

TMJ-1

Question
Answer
The head of condyle articulates with
Articular tubercle and anterior part of mandibular fossa   
The mandibular fossa is in
Temporal bone
The articular surfaces of mandible and temporal bone is interposed by
Articular disc
The anterior region of articular disc fuses with
Fibrous capsule
The posterior region of articular disc fuses with fibrous capsule by
Bilaminar zone
The loose connective attachment at the posterior border of articular disc facilitates
Anterior movement
The medial and lateral surface/ corners of articular disc are attached to
Condyle of mandible
The articular space can be divided in to
Lower condylodiscal and upper temporodiscal compartments
In saggital section the shape of the articular meniscus is
Biconcave
The vasuclarization of bilaminar zone of the posterior band of the articular disc is
Richly vascularized and innervated                                       
The superior stratum of bilaminar zone of the posterior band of the articular disc is attached to the
Posterior wall of mandibular fossa; Squamoustymapanic suture
The inferior stratum of bilaminar zone of the posterior band of the articular disc is attached to the
Mandibular condyle
The rotational movement of the Temporomandibular joint occurs in
Inferior portion
The rotational movement across an axis through heads of condyle of Temporomandibular joint results in
Opening of jaws
The translatory movement of articular disc results in
Anterior and Posterior movement of jaws
The articular capsule is strengthened by
Lateral ligament
The inner aspect of the Temporomandibular joint capsule is lined by
Synovial membrane
The synovial membrane does not line
Surface of disc; Articular tubercle; Condylar head
The indication of a Temporomandibular joint is seen at the ________ week of embryo.
Tenth
In embryo, Temporomandibular joint cavities appear around the
Twelfth week
The condyle of mandible is made up of
Cancellous bone covered by thin compact bone
The trabeculae at the condylar head radiate from neck and meets the cortex at
Right angle
With increase in age, trabeculae of the condyle
Thickens
A layer of hyaline cartilage under the fibrous covering of head of condyle indicates
Period of active growth
The roof of mandibular fossa is made of
Thin compact bone
The articular tubercle is composed of
Cancellous bone covered by thin compact bone
The articular fibrous connective tissue of an adult contains varying number of
Chondrocytes
The number of  chondrocytes in the articular fibrous covering of Temporomandibular joint
Increases with age
The fibrous connective tissue lining the posterior articular tubercle has
Three zones
The inner zone of the fibrous covering posterior articular tubercle has fibers at
Right angles to bone
The blood supply in central area of articular disc is
Devoid of blood supply
Temporomandibular joint can be best described as a
Ginglymo arthroidal synovial joint
According to phylogenetics the primary jaw joint in the humans is the
Incudomalleolar articulation. Temporomandibular joint is a secondary joint in phylogenetics as the joint from the Meckel’s cartilage is the Incudomaleolar joint
The type of collagen elaborated by the chondroblast in condylar cartilage during formation of the condyle is the
Type II collagen
At birth the articular eminence is
Not formed
The fan shaped ligament associated with the Temporomandibular joint is the
Temporomandibular ligament
The residual perichondrium of Meckel’s cartilage is present as
Sphenomandibular ligament
The free border of deep cervical fascia is represented by the
Stylomandibular ligament
The folds or the microvilli in the synovial membrane
Increases with age. The folds of the synovial membrane increases with age and in pathology.
The first indication of the Temporomandibular joint is the formation of the
Temporal blastema. After the temporal blastema is formed, condylar blastema is formed in mesenchymal condensation.
The fibrous layer covering condyle is lined by a vascular fibrous connective tissue is the
Lamina splendens

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