Occlusion Final Flashcards
The position of the temporomandibular ligament is designed to limit what type of movement in the mandible?
Pure Hinge Axis Rotational Movement
The full length of the temporomandibular ligament occurs at no more than ______ of opening
15-20 mm
After the temporomandibular ligament is at full length (15-20 mm), what occurs at that pivot point?
Translation
The anterior border of the articular disc is _____ than the posterior border
Thinner
Where does most of the mandibular movement occur?
2 places
Intermediate zone (thinnest) Anterior region
What is an incorrect statement about the retrodiscal tissues of the temporomandibular joint?
They are inelastic
T/F
The retrodiscal tissues of the TMJ are highly innervated and vascular
True
T/F
The retrodiscal tissues of the TMJ can be painful when subjected to force or “loading”
True
T/F
Any type of trauma can cause inflammation surrounding the articular disc of the TMJ
True
Regarding maximum intercuspation, what has an important relationship in Class 1 Occlusion?
1st Molars and Canines
T/F
For maximum intercuspation:
There must be adequate overlap of the Max and Mand teeth.
Occlusal forces should be exerted down the long axis of posterior teeth.
There should be multiple occlusal contacts on all teeth that adequately distribute forces.
True
T/F
For Maximum intercuspation, there must be simultaneous contact of only the posterior teeth (not the anterior teeth)
False
T/F
For Maximum intercuspation, anterior tooth occlusal contacts should dominate over the posterior teeth
False
T/F
For Maximum intercuspation, posterior teeth display “passive” occlusal contact (minimal contact)
False
What is the muscle of mastication that retracts or retrudes the mandible and positions the mandible to obtain centric relation?
Temporalis
The Medial Pterygoid is the primary muscle to produce what movement?
Mediotrusive
What is the muscle of mastication that is progressively active during closing movement of the mandible and frequently displays a spasm as a result of some types of occlusal dysfunction?
Superior Head Lateral Pterygoid
During normal closure of the mandible against the maxilla, the posterior fibers of the temporalis muscle will contract.
Incorrect
During normal closure of the Mand against Max:
Condyle will be primarily within Glenoid Fossa
Medial Pterygoid will contract
Masseter contracts
Suprahyoids, Infrahyoids relax
Posterior neck muscles minimally contract to hold Cranium in place
Correct
Functional Activity influences the Arch Alignment of the teeth.
Incorrect
The following influence the Arch Alignment of the teeth: Max/Mand arch size Occlusal contact relationship Musculature w/ facial-lingual effects Missing teeth Fractured cusps Carious teeth Rotated/ectopical teeth
Correct
The permanent Maxillary 2nd Molar will articulate with what teeth?
Mand 2nd and 3rd Molars
What is an example of an ideal force application on teeth?
Occlusal forces on Posterior teeth occur long axes to the roots
In the cusp-fossa relationship of posterior teeth, the preferred name for contact between the Maxillary Lingual cusps and Mandibular Facial cusps is:
Centric
When attempting to describe ideal tooth positions in stationary occlusion, the Centric Relation and Maximum Intercuspation positions do not have to be coincident.
Incorrect
Stationary Occlusion: Precise Max/Mand Precise, Minimal, Short Lasting Arches receive contact then release with movement Contacts anatomically driven
Correct
Where will the mesiolingual cusp of the Mand 2M be in relation to the Maxilla?
Lingual embrasure between Max 1 and 2M
When a patient is in the intercuspal position, the distofacial cusp of the Max 1M is located…
In the distofacial groove of the Mand 1M
During a right sided lateral movement of the mandible, the distolingual cusp of the Mand 1st Left Molar from where to where?
Lingual sulcus of Max 1M
Diagonally to
Anterior portion of palate
When viewing a moving occlusion diagram with the base of the bold black arrow in the central fossa of the Mand Left 1M and the arrow is pointing through the lingual groove toward the tongue, this is designating…
Laterotrusive movement
When viewing a moving occlusion diagram:
Base bold black arrow at Central Fossa of Mand Left 1M, arrow pointing toward facial surface,
what movement is designated?
non-functional
When viewing a saggital pantographic tracing of the Mand border movements at the level of the Mand CI’s, the position that is most anterior is:
Maximum Protrusion
When viewing a Frontal Pantographic tracing of Mandibular border movements at the level of the Mand CI’s, the most superior position is:
Maximum Intercuspation
When viewing a saggital pantographic tracing of Mandibular border movements at the level of the Left Condyle, the movement or position that is the most superior is:
Working Movement
If a clinician wants to increase the horizontal overlap on Anterior Teeth but keep vertical overlap unchanged…
(2 correct, 2 incorrect statements)
Correct:
Posterior Cusps flatter
Anterior Guidance angle Decrease
Incorrect:
Posterior Cusps taller
Incisal edges Max/Mand in close contact
When the posterior and anterior controlling factors are not identical, the mandibular teeth most affected by the condyle is the…
3rd Molar
If a patient has a flatter plane of occlusion, the curve of Spee radius will be:
Longer
Immediate Sideshift is when initial Mand lateral translation movement occurs _____ the condyle translates from the fossa.
The greater the Immediate Sideshift, the ____ the posterior cusps must be and the ______ the opposing fossae and grooves.
Before
Shorter
Wider
For the horizontal determinants of occlusion, the ______ the distance of the tooth from the axis of rotation (condyle), and the ________ the angle formed by laterotrusive and mediotrusive pathways.
Greater
Wider
When evaluating the horizontal determinants of occlusal morphology, the greater the distance from the rotating condyle, the…
Wider the angle between Laterotrusive and Mediotrusive pathways
What are the advantages/disadvantages to using a Semiadjustable Articulator?
2 correct statements
Replicates Specific condylar movement
Excellent for Routine dental treatment
What are the advantages/disadvantages to using a Semiadjustable Articulator?
2 Incorrect statements
Less time trasferring info from pt. to articulator than nonadjustable one
Less expensive than nonadjustable
The arbitrary mounting of Maxillary and Mandibular casts is part of a Fully Adjustable articulator
Incorrect
Fully adjustable articulator:
Exact Hinge Axis location of condyles for facebow
Pantographic recording
Centric relation Occlusal record
Correct
Incorrect statement of Working Side Occlusal Prematurity:
Facial inclines of the Max posterior lingual cusps
Working side occlusal prematuraties: lingual inclines Max Post facial cusps facial inclines Mand Post facial cusps lingual inclines Max Post lingual cusps facial inclines Mand post lingual cusps
Correct
If a patient has a premature occlusal contact on the lingual inclines of the Mand Post facial cusps, these would be known as…
Non-working interference
If a patient has a premature contact, or closure interference, that involves direct contact with the triangular ridge of the mesiofacial cusp on a Max 1M and the facial ridge of the mesiofacial cusp of the Mand 1M, the clinical condition would see:
Mand deviating opposite side of premature contact
What does Myofacial Pain Syndrome not entail?
Pain abnormalities only systemic in origin
this is an incorrect statement
Myofacial pain syndrome entails:
pain of regional nature originating at trigger point within muscle, facia
pain that refers to other areas
autonomic abnormalities (blanching, cold, sweat, erythema, hyperesthesia, hyperalgesia)
Correct
2 Incorrect statements concerning stages of muscle disorders and how trismus displays various clinical attributes:
Pain is never variable
Process is irreversible
Trismus:
Incisal-interocclusal distance less than 18mm
Presence of Hard end feel
Secondary to infection, hematoma, and trauma
Correct
A trigger point on the anterior temporalis will refer pain to…
Maxillary Incisors
The internal derangement of the articular disc making opening and closing clicks is called…
Disc displacement with Reciprocal Click
An INcorrect statement regarding intracapsular disorders:
Having a patient protrude their mandible against resistance as they bite will increase pain
Intracapsular Disorders:
Interarticular pressure and Mand movement elicit pain
Increase TMJ pressure elicits pain
If biting tongue blade painful = Inferior Lat. Pterygoid
Biting opposide side affected joint increases pain
Correct
Pain Conditions that might be confused with Temporomandibular Disease
(2 correct)
Necrotic pulp pain with limited mouth opening
Cervical spine pain produces reflex muscle response in trigeminal area - muscles of mastication
T/F
Temporomandibular Disease:
Biting on opposite side of affected joint will increase pain.
Has increased interarticular pressure and Mandibular movement
False
The proper clinical method to resolve a spontaneous dislocation or subluxation is…
Manipulation of mandible by clinician
