Create
Learn
Share

Tmdt2

rename
robbypowell's version from 2016-06-24 01:05

2

Question Answer
T/F: Nociceptive impulses can be sent by somatic, autonomic & motor nervesTrue (most somatic, some autonomic, small portion motor)
Nociceptive impulses are mostly sent by ____ nerves, some are sent by _____ nerves and a very small portion are sent by _____ nervesmost somatic, some autonomic, small portion motor
what are the Two types of movement that TMJ joint is capable of?Rotation and Translation (hinge-type and gliding movements)
The bony components of the TMJ are enclosed and connected by a ____ capsuleFibrous
A distinguishing feature of the TMJ joint is coverage of the articulating surfaces by ____ cartilage (an exception) rather than _____ cartilage (the norm)Fibrous cartilage (fibrocartilage); Hyaline cartilage
The S-shaped form of the mandibular fossa and articular eminence develops at about _________ years of age and continues into the second decade.6 years old
In centric relation the condyle of the mandible is in the _______ _______ of the _____ boneGlenoid fossa (aka mandibular fossa); Temporal bone
The articular disc is attached by ____ to the lateral and medial poles of the condyleligaments
T/F: normally, The articular disc is avascular and has little sensory nerve penetrationTrue
T/F: normally, The articular disc is highly vascular and innervated with A and B nerve fibersFalse (avascular, no sensation)
In a normal patient, pain from the TMJ is caused by what area of the joint because it is highly vascular and innervated?Posterior attachment (retrodiscal tissue)
What part of what muscle always inserts into the anterior part of the articular disc?Superior head of the Lat Pterygoid
What muscle always inserts into the anterior part of the articular disc and the mandibular condyle?Lateral Pterygoid (Sup. --> disc; Inf --> condyle)
What 2 muscles MAY attach to the anterolateral portion of the articular disc?Temporalis (post. 1/3rd) & Masseter (Deep masseter)
loosely organized system of collagen fibers, branching elastic fibers, fat, blood and lymph vessels, and nerves describes what component of the TMJ joint?Retrodiscal tissue (aka posterior attachment)
What are the 3 nerves that innervate the TMJ? (more specific than CN #)Auriculotemporal, Deep Temporal and Masseteric nerves
The _____ artery is the main supply of blood to the TMJExternal Carotid
The ECA bifurcates at the level of the carotid neck into what two arteries that supply the muscles of mastication and the TMJ?Superficial Temporal art. & Internal Maxillary art.
T/F: when the mandible is not functionally active it adopts a rest position with teeth closed in centric relationFALSE (teeth open, not centric relation but determined by minimal muscular activity)
T/F: When the mandible is not functionally active, it adopts a rest position in which the condyle occupies a relatively central position in the glenoid fossa with the teeth separatedTrue (determined by minimal muscular activity)
maxillomandibular relationship in which each condyle articulates with the thinnest avascular portion of the disc in an anterosuperior position against the posterior slope of the articular eminenceCentric Relation
T/F: Adjusting the maximum intercuspal position to be coincident with centric relation is an effective way to treat patients with Temporo-mandibular Joint disordersFalse (evidence is lacking)
The average rotation of the condyle is ___° and the condylar translation is between _________-_________ mm for maximum opening24 degrees; 13-15 mm (max translation)
Articular disc movement is limited to a max range between _________-_________ mm5-9 mm
_____ displacement remains the most common diagnostic indicator (of TMJ disorder?)Incisor
Articular surface coating is fibrocartilage and is thickest where? thickest on the posterior slope of the articular eminence and on the anterior slope of the condylar head; these are the areas thought to receive the greatest functional load
What two areas receive the greatest functional load in TMJ articular surfaces?posterior slope of the articular eminence andthe anterior slope of the condylar head
Which has a greater repair capacity... Hyaline cartilage or Fibrocartilage?Fibrocartilage
thinnest part of the articular fibrocartilage covering is found where?roof of the mandibular fossa
Because this muscle inserts into the anterior articular disc, there is a theory that dysfunction of what muscle may cause some anterior disc displacements?Lateral Pterygoid (Sup head)
What is the most common TMJ irregularity detected during clinical examination?Clicking (joint sounds)
What proportion of of asymptomatic volunteers with with clicking of TMH were shown on magnetic resonance imaging (MRI) examination of the TMJs to have disc displacements?1/3rd
T/F: The angle or steepness of the mandibular fossa has been considered a contributing factor in intra-articular disorders.True
T/F: The angle or steepness of the mandibular fossa is unrelated to intra-articular disorders.False (has been considered to be a contributing factor)
T/F: Steep articular eminences can be caused by osseous changes in response to Anterior disc displacementsTrue
What type of dislocation is thought to be the most common cause of joint noises esp. clickingAnterior Disc Displacement
T/F: Pain from disc dislocation is caused by mechanical irritation of the Auriculotemporal nerve, due to its close proximity to the medial aspect of the condyleFALSE (old debunked thought)
T/F: Pain from disc dislocation is cause by compression of the highly innervated retrodiscal tissueTissue
T/F: Pain from disc dislocation is caused by mechanical irritation of the nerves in the articular discFalse (articular disc in not innervated)
T/F: evidence for occlusal characteristcs to cause TMD fails to show a strong association.True
T/F: A reduced number of contacting teeth in the intercuspal position and loss of posterior teeth are primary risk factors for the development of TMDsFALSE (studies show no strong association)
T/F: The loss of occlusal vertical dimension is a common cause of TMDFALSE (evidence for this is lacking)
Where does trigeminal sensory input converge in the CNS (what nucleus)?Spinal tract nucleus of the brain stem (? okay...)
Which cranial nerve is the Principal innervator of the facial skin, corneas, oral and nasal mucosa, teeth, tongue, masticatory muscles, and meningeal linings?Trigeminal (CN5)
CN 7 has a (large/small) motor component and a (large/small) sensory componentLarge motor; Small sensory
Although this cranial nerve does not supply sensory input , many patients with OFP report symptoms that may be associated with function of this nerve... which?CN 8 (vestibulocochlear... vertigo, tinnitus)
Sensory afferents of which CN supply mucous membranes of pharynx, fauces, palatine tonsils, and posterior tongue?Glossopharyngeal (CN9)
memorize

ligaments

Question Answer
The ________ ligament extends from the styloid process to the deep fascia of the medial pterygoid muscle.stylo-mandibular ligament
The ________ ligament is thought to become tense during protrusive movement of the mandible and may contribute to limiting protrusive movementstylo-mandibular ligament
The ________ ligament is comprised of thin INELASTIC fibrous connective tissue envelope that attaches to the margins of the articular surfacesCapsular Ligament
The capsule and the ____ ______ ligament join and attach to the lateral aspect of the neck of the condylelateral discal ligament
The ______ ligament is "The main ligament of the joint"Lateral Temporo-mandibular ligament
The ______ ligament arises from the sphenoid bone and inserts on the medial aspect of the mandible at the lingula.Speno-mandibular ligament
What TMJ accessory ligament attaches to the mandible is not considered to limit or affect mandibular movement?Spheno-mandibular ligament
T/F: The Stylomandibular ligament attaches to the mandible is not considered to limit or affect mandibular movementFalse (spheno-)
T/F: The Sphenomandibular ligament attaches to the mandible is not considered to limit or affect mandibular movementTrue
T/F: The Stylomandibular ligament is thought to become tense during protrusive movement of the mandible and may contribute to limiting protrusive movementTrue
T/F: The Sphenomandibular ligament is thought to become tense during protrusive movement of the mandible and may contribute to limiting protrusive movementFalse (Stylo-)
What TMJ accessory ligament attaches to the deep fascia of the medial pterygoid muscle? (not the mandible)Stylo-mandibular ligament
memorize

muscles, baby. big strong oiled TMJ muscles

Question Answer
Mandibular movements toward the tooth contact position are performed by contraction of what 3 paired muscles?masseter, temporalis, and medial pterygoid muscles
Contraction of what muscle contributes to moving the condylar head toward the anterior slope of the mandibular fossa?Masseter
What muscle creates a sling with the Medial Pterygoid?Masseter
What muscle creates a sling with the Masseter?Medial Pterygoid
The posterior part of the what muscle contributes to mandibular retrusion?Temporalis
Unilateral contraction of what paired muscle contributes to a contralateral movement of the mandible?the medial pterygoid
sole contraction of the Right medial pterygoid contraction makes the mandible move in what direction?Left
Which of the muscles of mastication is not palpable in clinical exam?Lateral Pterygoid
masticatory structures are innervated primarily by the _____ nerve (cranial nerve), but cranial nerves ___, ___, ___, and _________ and cervical nerves _________ and _________ also contributeMainly Trigeminal (V3); also CN's 7, 9, 10, 11 and Cervical nerves 2 & 3
The _____ division of the trigeminal nerve supplies motor innervation to the muscles of mastication and the anterior belly of the digastric muscleMandibular division (V3)
memorize

Recent badges