Dental Occlusion Exam 1

When a patient is in static or stationary occlusion, occlusal contacts should occur between a cusp tip and...

• The depth of an opposing fossa

• The depth of an opposing pit

• The height of an opposing ridge

• The ridge if an opposing cusp

When examining the distance between the condyle and the first premolars on one side of the oral cavity, the occlusal forces exerted on the first premolars are approximately 50% less than the forces exerted on the third molars.

• True

• False

When observing the anterior guidance for a patient, if the horizontal overlap remains unchanged and the amount of vertical overlap increases, the anterior guidance will_____?

• Increase

• Decrease

• Shift mesially

• Shift distally

If condylar guidance was the only vertical determinant of occlusion, the cusp angles would need to be ____ ___ the angle of the articular eminence in order to avoid a collision in eccentric movements.

• Greater Than

• Less Than

• Same as

• Next to

Horizontal determinants of occlusion influence the direction and location of ridges and grooves on the occlusal surfaces.During eccentric movements, cusps pass between ridges and over grooves so the horizontal determinants also influence the placement of cusps.

• Both statements are true

• Both statements are false

• The first statement is true and the second statement is false

• The first statement is false and the second statement is true

In a patient exhibiting both anterior and posterior controlling factors of 45 degrees each, what would be the angle of the mandibular first premolar as it moves away from the horizontal reference plane when the mandible is opened?

• 30 degrees

• 45 degrees

• 60 degrees

• 90 degrees

The Outer Oblique portion of the Temporomandibular Ligament limits normal rotational opening movementThe Inner Horizontal portion of the Temporomandibular ligament limits Anterior movement of the condyle and articular disc

• Both Statements are True

• Both Statements are False

• The First Statement is True the Second is False

• The First Statement is False the Second is True

When altering the vertical determinants of occlusal morphology by making the plane of occlusion more parallel to condylar guidance, the effect on cusp height and fossa depth will display?

• Shorter posterior cusps

• Shorter anterior cusps

• Longer posterior cusps

• Longer anterior cusps

Regarding the occlusal relationship of posterior teeth, occlusal contacts should ideally occur between a cusp tip and the depth of a fossa, or between a cusp tip and a flat surface, which is considered more stable.Contacts should occur on cuspal inclines because these are more stable

• Both statements are true

• Both statements are false

• The first statement is true, the second statement is false

• The first statement is false, the second statement is true

What is INCORRECT regarding the Mandibular position known as Centric Relation?

• It is a condylar position and does NOT need any tooth contact to be obtained

• It establishes the position of the condyle in a superior and anterior location with the disc properly interposed between the condyl and temporal bone

• It exhibits articulartion on the thickest portion of the articular disc

• It is described as the most stable position of the condyle

• It is a position of the mandible where the musculature displays minimal tonus

Anterior guidance is a function of the relationship between the maxillary and mandibular posterior teeth.Anterior guidance consists of the vertical and horizontal overlaps as measured at the anterior teeth

• Both Statements are True

• Both Statements are False

• The first statement is true the second statement is false

• The first statement is false the second statement is true

The relationship between the medial pole of condyle and medial pterygoid muscle on one side established the mid-most position of the mandible at centric relation.The normal curve of occlusion is possible because the interaction of the mesial pole of condyle with the non-steep medial wall of the fossa prevents the mandibular posterior teeth from moving straight horizontally away from the midline

• Both Statements are True

• Both Statements are False

• The First statement is true the second is false

• The First statement is false the second is true

What is CORRECT regarding the functional and non-functional pathways of the maxillary cusps positioned over the mandibular teeth?

• The non-functional pathway represents the region where the mandible typically does not move during normal function.

• The non-functional area is smaller than the functional area

• The functional pathway is all of the potential area that the mandible cannot move into

• The working pathway is located within the non-functional area

As the plane of occlusion becomes more nearly parallel to the angle of the articular eminence, the posterior cusps will need to be longer in order to avoid collisions with each other.The more parallel the horizontal reference plane is to the Condylar Guidance Angle, the steeper the cusps can be.

• Both Statements are True

• Both Statements are False

• The first statement is true the second statement is false

• The first statement is false the second statement is true

Which of the following is INCORRECT regarding the cusp-fossa/marginal ridge locations for centric holding cusps on maxillary posterior teeth

• The distolingual cusp of the maxillary first molar = mesial fossa of the mandibular first molar

• The lingual cusp of the maxillary first molar = distal marginal ridge or distal fossa of the mandibular first premolar

• The lingual cusp of the maxillary first molar = distal marginal ridge or distal fossa of the mandiublar first molar

• Mesionlingual cusp of the maxillary second molar = central fossa of the mandibular second molar

• Distonlingual cusp of the maxillary second molar = distal marginal ridge or distal fossa of the mandibular second molar

The mesiofacial cusp on a permanent mandibular left first molar, during a non-working movement, will travel from where to where?

• Mesial marginal ridge of the permanent maxillary second molar diagonally through the lingual embrasure between the maxillary second premolar and maxillary first molar

• Central permanent maxillary first molar diagonally through the lingual embrasure between the maxillary second premolar and maxillary first molar

• Distal marginal ridge of the permanent maxillary first molar diagonally through the lingual embrasure between the maxillary second premolar and maxillary first molar

• Mesial marginal ridge of the permanent maxillary first molar diagonally through the facial embrasure between the maxillary second premolar and maxillary first molar

How does the maxillary arch form dominate or influence the mandibular arch form?

• The maxillary arch is larger than in the mandible, from the distal of a third molar on one side through the middle of each tooth to the third molar on the other sidees

• Esthetics are embedded more in the mandibular arch than in the maxillary arch, because the smile line is extremely evident in the mandibular anterior teeth

• The maxillary arch is smaller than in the mandible, from the distal of a third molar on one side through the middle of each tooth to the third molar on the other side

• The maxillary arch is wider, or larger in measurement from right to left sides

• The maxillary arch is more narrow, or less in measurement from right to left sides

Which muscle of mastication exhibits a superior and slightly medial force vector in the frontal plane?

Which of the following is INCORRECT about the innervation and vascularization of the Temporomandibular Joint?

• Most of the innervation to the TMJ is by the auriculotemporal nerve

• Additional innervation (sensory) to the TMJ is supplied by the deep temporal and masseteric nerve branching of the Trigeminal V-3 nerve

• The TMJ is innervated by one nerve that provides motor innervation and a different nerve that provides sensory innervation to individual muscles.

• Primary vascularization is with the superficial temporal branch of the external carotid artery

• The condyle receives vascular supply throguh its marrow spaces from the inferior alveolar artery and feeder vessels from other branches that perforate the head from various angles

What is true regarding class 2 occlusion?

• Mesially positioned first molar and canine relationships with little anterior horizontal overlap

• Mesially positioned first molar and canine relationships with excessive anterior horizontal overlap

• Distally positioned first molar and canine relationships with little anterior horizontal overlap

• Distally positioned first molar and canine relationships with excessive anterior horizontal overlap

If a patient has a loose temporomandibular ligament on their working side and a sizable distance between the medial wall of the fossa and medial pole of the condyle on the non-working side, this would cause what?

• The cusp heights on the NON-working side to be higher

• The cusp heights on the working side to be higher

• The cusp heights on the NON-working side to be shorter

• The cusp heights on the working side to be shorter

When examining mandibular movement on the non-working side, the closer the tooth is to the midline, the _____ the angle between the laterotrusive and mediotrusive pathways.

Regarding the intra-arch alignment of teeth, the maxillary teeth having only one namesake in the opposing arch are the ______ ______?

In regards to the timing of mandibular lateral translation, the cusps on the non-working side must be shorter if ____?

• The immediate vertical opening has a noticable measurement

• The gradual vertical opening has a noticable measurement

• The immediate sideshift has a noticable measurement

• The gradual sideshift has a noticable measurement

The pathway of the maxillary cusps positioned over the mandibular teeth which is parallel to the mandibular molar lingual groove and travels toward the tongue is termed ______.

Type question here. Example: PracticWhen contemplating the effect of anterolateral and posterolateral translation of the working condyle, the more posterolateral the movement of the working condyle, the ________  is the angle formedby the mediotrusive and laterotrusive pathways.

Mandibular lateral translation is the first part of the lateral movement of the mandibule, depicted when the medial pole of the working condyle starts to travel down the slipe of the articular eminence and against the medial wall of the fossa.The movement is exhibited as a measurement of the distance between the medial pole of the working condyle and the medial wall of the glenoid foaase.

• Both Statements are True

• Both Statements are False

• The first statement is true the second statement is false

• The first statement is false the second statement is true

Which of the following is true about Maximum Intercuspation?

• The teeth determine the occlusal position

• If centric relation and maximum  intercuspation coincide, the patient will have a "slide"

• All occlusal forces should be concentrated down the long axis of anterior teeth

• The maximum intercuspation position is dynamic in nature and will change throughout a patients life

What occurs during normal jaw opening movement during the latter stages of mandibular opening?*The ________. _________ of the lateral pterygoid is at _______ point of contracture.

Which is CORRECT about the ideal plane of occlusion?

• The ideal plane of occlusion is flat. A flat plane allows for the maximum utilization of tooth contacts during function.

• The proper plane of occlusion enables simultaneous functional contacts to occur in controlled areas of the dental arch.

• A curved plane permits excessive contact on posterior teeth on both sides of the mouth.

• The teeth are strategically positioned in the arches with varied and coordinated degrees of inclination.

• The ideal plane of occlusion is curved.

Which of the following is correct regarding the Mylohyoid Muscle?

• The mylohyoid muscle will slightly depress the mandible

• It will elevate the hyoid, the floor of the oral cavity, and the tongue

• The mylohyoid muscle will slightly close the mandible

• This muscle is very important during speaking and swallowing

During a right lateral movement of the mandible, the left side of the mandible is termed the ___-_____ _______.

Which type of mandibular movement is indicated in a moving occlusion diagram that displays a large bold arrow emanating from the central fossa of a permanent maxillary first molar traveling out the facial groove?

Which of the following are NORMAL functional activities of the Temporalis Muscle?

• Opening the mandible in a superior direction

• Causing clenching of the teeth to occur when the muscle is overused

• Retracting or retruding the mandible

• Producing lateral movement of the mandible

• Positioning the mandible to obtain centric relation

When viewing a pantographic tracing of mandibular border movements from a SAGGITAL view at the level of the mendibular central incisors, which position exhibits TOOTH CONTACT?

Which is true regarding the superior head of the lateral pterygoid?

• It maintains a sustainable and consistent position of the articular disc

• It is progressively active during opening movement of the mandible

• It frequently displays a spasm as a result of some types of occlusal dysfunction

• This muscle works in concert with the action and inactivity of the inferior head of the lateral pterygoid

• This muscle of mastication is deep in placement and is mostly covered by the masseter so the clinician cannot palpate some portion of this muscle

Which type of mandibular movement is indicated in a moving occlusion diagram that displays a large bold arrow emanating from the distal fossa of a permanent maxillary first molar traveling diagonally and posteriorly over the distolingual cusp toward the lingual?

When viewing a pantographic tracing of mandibular movement at the CONDYLAR level on the LEFT side, the long sloping arc that travels mediotrusively and anteriorly is called the_______?

When viewing a pantographic tracing of mandibular border movements from a HORIZONTAL view at the level of the mandibular central incisors, which position is the most ANTERIOR?