Dental Occlusion Exam 1

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Dental Occlusion Exam 1 - Quiz

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Questions and Answers
  • 1. 

    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

    • A.

      Both Statements are True

    • B.

      Both Statements are False

    • C.

      The First Statement is True the Second is False

    • D.

      The First Statement is False the Second is True

    Correct Answer
    C. The First Statement is True the Second is False
    Explanation
    **The Outer Oblique Portion of the TML does limit normal rotational opening movement
    **The Inner Horizontal Portion of the TML limits **POSTERIOR** movement of the condyle and articular disc

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  • 2. 

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

    • A.

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

    • B.

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

    • C.

      It exhibits articulartion on the thickest portion of the articular disc

    • D.

      It is described as the most stable position of the condyle

    • E.

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

    Correct Answer
    C. It exhibits articulartion on the thickest portion of the articular disc
    Explanation
    The mandibular position will exhibit articular on the THINNEST portion of the asrticular disc during centric relation

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  • 3. 

    Which of the following is true about Maximum Intercuspation?

    • A.

      The teeth determine the occlusal position

    • B.

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

    • C.

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

    • D.

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

    Correct Answer(s)
    A. The teeth determine the occlusal position
    D. The maximum intercuspation position is dynamic in nature and will change throughout a patients life
    Explanation
    If centric relation and maximum intercuspation DO NOT coincide, the patient will have a slide. All occlusal forces should be concentrated down the long axis of POSTERIOR teeth.

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  • 4. 

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

    • A.

      Opening the mandible in a superior direction

    • B.

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

    • C.

      Retracting or retruding the mandible

    • D.

      Producing lateral movement of the mandible

    • E.

      Positioning the mandible to obtain centric relation

    Correct Answer(s)
    C. Retracting or retruding the mandible
    E. Positioning the mandible to obtain centric relation
    Explanation
    The Temporalis Muscle is responsible for retracting or retruding the mandible, which means it helps to move the lower jaw backwards. This muscle also plays a role in positioning the mandible to obtain centric relation, which is the ideal position of the jaw where the upper and lower teeth fit together properly. The other options mentioned in the question, such as opening the mandible in a superior direction, causing clenching of the teeth, and producing lateral movement of the mandible, are not normal functional activities of the Temporalis Muscle.

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  • 5. 

    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

    • A.

      Both Statements are True

    • B.

      Both Statements are False

    • C.

      The First statement is true the second is false

    • D.

      The First statement is false the second is true

    Correct Answer
    C. The First statement is true the second is false
    Explanation
    The normal curve of occlusion is possible because the interaction of the medial pole of the condly with the STEEP medial wall of the fossa prevents the mandibular posterior teeth from moving straight horizontally TOWARD the midline

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  • 6. 

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

    • A.

      It maintains a sustainable and consistent position of the articular disc

    • B.

      It is progressively active during opening movement of the mandible

    • C.

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

    • D.

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

    • E.

      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

    Correct Answer(s)
    A. It maintains a sustainable and consistent position of the articular disc
    C. It frequently displays a spasm as a result of some types of occlusal dysfunction
    D. This muscle works in concert with the action and inactivity of the inferior head of the lateral pterygoid
    Explanation
    **This muscle is progressively active druing CLOSING of the mandible
    **This muscle is mostly covered but there is some section the clinician can palpate

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  • 7. 

    Which of the following is correct regarding the Mylohyoid Muscle?

    • A.

      The mylohyoid muscle will slightly depress the mandible

    • B.

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

    • C.

      The mylohyoid muscle will slightly close the mandible

    • D.

      This muscle is very important during speaking and swallowing

    Correct Answer(s)
    A. The mylohyoid muscle will slightly depress the mandible
    B. It will elevate the hyoid, the floor of the oral cavity, and the tongue
    D. This muscle is very important during speaking and swallowing
  • 8. 

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

    Correct Answer(s)
    Inferior Head Maximum
  • 9. 

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

    Correct Answer(s)
    Medial Pterygoid
  • 10. 

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

    • A.

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

    • B.

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

    • C.

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

    • D.

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

    • E.

      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

    Correct Answer
    C. The TMJ is innervated by one nerve that provides motor innervation and a different nerve that provides sensory innervation to individual muscles.
    Explanation
    The statement is incorrect because the TMJ is innervated by multiple nerves, not just one. The auriculotemporal nerve provides sensory innervation to the TMJ, while the deep temporal and masseteric nerves (branches of the Trigeminal V-3 nerve) also contribute to the sensory innervation. Additionally, the TMJ is innervated by the motor branches of the Trigeminal V-3 nerve, which provide motor innervation to the muscles involved in TMJ movement. Therefore, the innervation of the TMJ involves multiple nerves that provide both sensory and motor innervation to the joint and surrounding muscles.

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  • 11. 

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

    • A.

      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

    • B.

      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

    • C.

      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

    • D.

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

    • E.

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

    Correct Answer(s)
    A. 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
    D. The maxillary arch is wider, or larger in measurement from right to left sides
    Explanation
    The correct answer states that the maxillary arch is larger than the mandibular arch, extending from the distal of a third molar on one side through the middle of each tooth to the third molar on the other side. Additionally, it mentions that the maxillary arch is wider or larger in measurement from right to left sides. This suggests that the maxillary arch has a dominant or influential role in determining the overall shape and size of the mandibular arch.

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  • 12. 

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

    Correct Answer(s)
    Third Molars
    Explanation
    The maxillary teeth that have only one corresponding tooth in the opposing arch are the third molars. These are the last set of molars that typically erupt in the late teens or early twenties. Since the opposing arch usually does not have a third molar, they are the only teeth in the maxillary arch that have only one namesake in the opposing arch.

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  • 13. 

    Which is CORRECT about the ideal plane of occlusion?

    • A.

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

    • B.

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

    • C.

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

    • D.

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

    • E.

      The ideal plane of occlusion is curved.

    Correct Answer
    B. The proper plane of occlusion enables simultaneous functional contacts to occur in controlled areas of the dental arch.
    Explanation
    The ideal plane of occlusion is not necessarily flat or curved but is designed to allow for simultaneous functional contacts in specific controlled areas of the dental arch. This means that during normal biting and chewing, the teeth should come together in a coordinated manner to distribute forces evenly and promote optimal function.

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  • 14. 

    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.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The distance between the condyle and the first premolars in the oral cavity affects the occlusal forces exerted on the teeth. According to the given information, the occlusal forces on the first premolars are approximately 50% less than the forces exerted on the third molars. Therefore, the statement is true.

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  • 15. 

    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

    • A.

      Both statements are true

    • B.

      Both statements are false

    • C.

      The first statement is true, the second statement is false

    • D.

      The first statement is false, the second statement is true

    Correct Answer
    C. The first statement is true, the second statement is false
    Explanation
    **Contacts should NOT occur on cuspal inclines because these are LESS stable

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  • 16. 

    What is true regarding class 2 occlusion?

    • A.

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

    • B.

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

    • C.

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

    • D.

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

    Correct Answer
    D. Distally positioned first molar and canine relationships with excessive anterior horizontal overlap
    Explanation
    Class 2 occlusion refers to a dental condition where the first molar and canine relationships are distally positioned, meaning they are positioned further back than normal. Additionally, in class 2 occlusion, there is excessive anterior horizontal overlap, which means that the upper front teeth overlap significantly with the lower front teeth when the jaws are closed. This can result in an overbite or a deep bite.

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  • 17. 

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

    • A.

      The depth of an opposing fossa

    • B.

      The depth of an opposing pit

    • C.

      The height of an opposing ridge

    • D.

      The ridge if an opposing cusp

    Correct Answer
    A. The depth of an opposing fossa
    Explanation
    When a patient is in static or stationary occlusion, occlusal contacts should occur between a cusp tip and the depth of an opposing fossa. This means that the highest point of a cusp should make contact with the deepest part of the fossa on the opposing tooth. This ensures proper alignment and distribution of forces during biting and chewing. The depth of the opposing fossa is important because it allows for stability and prevents excessive wear or damage to the teeth.

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  • 18. 

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

    • A.

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

    • B.

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

    • C.

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

    • D.

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

    • E.

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

    Correct Answer
    A. The distolingual cusp of the maxillary first molar = mesial fossa of the mandibular first molar
    Explanation
    The mesiolingual cup of the maxillary first molar corresponds to the mesial fossa of the mandibular first molar.

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  • 19. 

    Bruxism is defined as: extensive and persistent maximum intercuspation occlusal contacts on inclines leading to mobility, excessive wear, fractures and other signs and symptoms of occlusal disease

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because bruxism is indeed defined as extensive and persistent maximum intercuspation occlusal contacts on inclines leading to mobility, excessive wear, fractures, and other signs and symptoms of occlusal disease. This means that bruxism involves grinding and clenching of the teeth, which can cause damage to the teeth and surrounding structures.

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  • 20. 

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

    Correct Answer
    Non-working side
    Explanation
    During a right lateral movement of the mandible, the left side of the mandible is referred to as the non-working side. This term is used to describe the side of the jaw that is not actively involved in the chewing or grinding of food during this specific movement. The working side, on the other hand, is the side of the jaw that is actively engaged in the chewing process.

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  • 21. 

    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 ______.

    Correct Answer
    Working
    Explanation
    The term used to describe the pathway of the maxillary cusps positioned over the mandibular teeth, parallel to the mandibular molar lingual groove, and traveling towards the tongue is "working." This term is commonly used in dentistry to describe the movement and function of the teeth during chewing and grinding of food.

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  • 22. 

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

    • A.

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

    • B.

      The non-functional area is smaller than the functional area

    • C.

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

    • D.

      The working pathway is located within the non-functional area

    Correct Answer
    A. The non-functional pathway represents the region where the mandible typically does not move during normal function.
    Explanation
    The correct answer states that the non-functional pathway is the area that the mandible cannot normally move into. This means that during normal jaw movements, the mandible does not pass through this area. It suggests that there is a specific region where the mandible cannot reach or function properly.

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  • 23. 

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

    • A.

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

    • B.

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

    • C.

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

    • D.

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

    Correct Answer
    B. Central permanent maxillary first molar diagonally through the lingual embrasure between the maxillary second premolar and maxillary first molar
    Explanation
    During a non-working movement, the mesiofacial cusp on a permanent mandibular left first molar will travel diagonally through the lingual embrasure between the maxillary second premolar and maxillary first molar. This means that the cusp will move from the mesial marginal ridge of the permanent maxillary first molar to the lingual embrasure between the maxillary second premolar and maxillary first molar.

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  • 24. 

    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?

    Correct Answer
    Laterotrusion
    Explanation
    The correct answer is laterotrusion. Laterotrusion refers to the lateral movement of the mandible, specifically towards the working side. In the given scenario, the large bold arrow emanating from the central fossa of a permanent maxillary first molar and traveling out the facial groove indicates a lateral movement towards the working side, which is characteristic of laterotrusion.

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  • 25. 

    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?

    Correct Answer
    Non-functional
    Explanation
    The correct answer is non-functional. In a moving occlusion diagram, a large bold arrow indicates the direction of mandibular movement. In this case, the arrow starts from the distal fossa of a maxillary first molar and travels diagonally and posteriorly over the distolingual cusp towards the lingual. This movement does not involve any functional activity like chewing or grinding, hence it is classified as non-functional.

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  • 26. 

    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?

    Correct Answer
    Edge-to-edge incisal
    Explanation
    When viewing a pantographic tracing of mandibular border movements from a sagittal view at the level of the mandibular central incisors, the position that exhibits tooth contact is edge-to-edge incisal. In this position, the incisal edges of the mandibular central incisors come into contact with the opposing teeth. This indicates that there is no overbite or overjet present, and the teeth are in a position where they can make direct contact with each other.

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  • 27. 

    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?

    Correct Answer
    Maximum Protusion
    Explanation
    In a horizontal view at the level of the mandibular central incisors, the most anterior position would be the maximum protrusion. This means that the mandible is pushed forward as much as possible, extending beyond its normal resting position. This can be seen in a pantographic tracing of mandibular border movements, where the most anterior position would indicate the furthest point of protrusion.

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  • 28. 

    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_______?

    Correct Answer
    Non-working condyle pathway
    Explanation
    The long sloping arc that travels mediotrusively and anteriorly when viewing a pantographic tracing of mandibular movement at the condylar level on the left side is referred to as the non-working condyle pathway. This pathway represents the movement of the condyle on the side opposite to the direction of mandibular movement during lateral excursion.

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  • 29. 

    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.

    • A.

      Both Statements are True

    • B.

      Both Statements are False

    • C.

      The first statement is true the second statement is false

    • D.

      The first statement is false the second statement is true

    Correct Answer
    B. Both Statements are False
    Explanation
    ** Both of this happen at the NON-WORKING condyle

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  • 30. 

    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.

    • A.

      Greater Than

    • B.

      Less Than

    • C.

      Same as

    • D.

      Next to

    Correct Answer
    B. Less Than
    Explanation
    If condylar guidance was the only vertical determinant of occlusion, the cusp angles would need to be less than the angle of the articular eminence in order to avoid a collision in eccentric movements. This means that the cusps of the teeth should be positioned lower than the angle of the articular eminence to prevent any contact or collision during movements other than the normal biting position.

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  • 31. 

    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?

    • A.

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

    • B.

      The cusp heights on the working side to be higher

    • C.

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

    • D.

      The cusp heights on the working side to be shorter

    Correct Answer
    C. The cusp heights on the NON-working side to be shorter
    Explanation
    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, the cusp heights on the non-working side would be shorter. This is because the loose ligament on the working side allows for excessive movement of the condyle, causing the non-working side to have less contact and therefore shorter cusp heights.

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  • 32. 

    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

    • A.

      Both Statements are True

    • B.

      Both Statements are False

    • C.

      The first statement is true the second statement is false

    • D.

      The first statement is false the second statement is true

    Correct Answer
    D. The first statement is false the second statement is true
    Explanation
    Anterior guidance is a function of the relationship between the maxillary and mandibular ANTERIOR teeth

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  • 33. 

    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_____?

    • A.

      Increase

    • B.

      Decrease

    • C.

      Shift mesially

    • D.

      Shift distally

    Correct Answer
    A. Increase
    Explanation
    When observing the anterior guidance for a patient, if the horizontal overlap remains unchanged and the amount of vertical overlap increases, it means that the lower front teeth are moving closer towards the upper front teeth. This movement will result in an increase in the anterior guidance, which refers to the contact and movement of the front teeth during jaw movements. Therefore, the correct answer is "Increase".

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  • 34. 

    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?

    • A.

      30 degrees

    • B.

      45 degrees

    • C.

      60 degrees

    • D.

      90 degrees

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

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  • 35. 

    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.

    • A.

      Both Statements are True

    • B.

      Both Statements are False

    • C.

      The first statement is true the second statement is false

    • D.

      The first statement is false the second statement is true

    Correct Answer
    B. Both Statements are False
    Explanation
    **As the plane of occlusion becomes more nearly parallel to the angle of the articular eminence, the posterior cusps will need to be SHORTER in order to avoid collisions with each other.
    **The LESS parallel the horizontal reference plane is to the Condylar Guidance Angle, the steeper the cusps can be.

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  • 36. 

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

    • A.

      The immediate vertical opening has a noticable measurement

    • B.

      The gradual vertical opening has a noticable measurement

    • C.

      The immediate sideshift has a noticable measurement

    • D.

      The gradual sideshift has a noticable measurement

    Correct Answer
    A. The immediate vertical opening has a noticable measurement
    Explanation
    When there is an immediate vertical opening with a noticeable measurement, it means that the mandible moves downward abruptly. In order for this movement to occur smoothly, the cusps on the non-working side must be shorter. This allows for proper alignment and prevents interference between the cusps during the vertical opening.

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  • 37. 

    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.

    • A.

      Both statements are true

    • B.

      Both statements are false

    • C.

      The first statement is true and the second statement is false

    • D.

      The first statement is false and the second statement is true

    Correct Answer
    A. Both statements are true
    Explanation
    The explanation for the correct answer "Both statements are true" is that horizontal determinants of occlusion do indeed influence the direction and location of ridges and grooves on the occlusal surfaces. Additionally, during eccentric movements, cusps pass between ridges and over grooves, which means that the horizontal determinants also influence the placement of cusps. Therefore, both statements accurately describe the relationship between horizontal determinants of occlusion and the features of occlusal surfaces.

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  • 38. 

    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.

    Correct Answer
    Smaller
    Explanation
    The closer the tooth is to the midline, the smaller the angle between the laterotrusive and mediotrusive pathways. This means that when the tooth is closer to the midline, the deviation from the straight pathway during mandibular movement on the non-working side is less pronounced.

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  • 39. 

    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.

    Correct Answer
    Larger
    Explanation
    When the working condyle moves in a more posterolateral direction, the angle formed by the mediotrusive and laterotrusive pathways becomes larger.

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  • 40. 

    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?

    • A.

      Shorter posterior cusps

    • B.

      Shorter anterior cusps

    • C.

      Longer posterior cusps

    • D.

      Longer anterior cusps

    Correct Answer
    A. Shorter posterior cusps
    Explanation
    When altering the vertical determinants of occlusal morphology to make the plane of occlusion more parallel to condylar guidance, the effect on cusp height and fossa depth will be shorter posterior cusps. This means that the cusps on the back teeth will be reduced in height. This adjustment helps to create a more harmonious occlusion and improves the stability and function of the bite. Shorter posterior cusps allow for better distribution of forces during chewing and prevent excessive wear or damage to the teeth.

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Benjamin Yoon |DMD (Dentistry) |
Dentistry
Benjamin earned his Doctor of Dental Medicine (DMD) from Nova Southeastern University College of Dental Medicine, equipping him with the necessary expertise and skills to excel in the field of dentistry. He is currently serving as a general dentist in the US Army. As our meticulous dental expert, he reviews our quizzes to guarantee top-notch quality. With his extensive knowledge and acute attention to detail, he ensures our dental content is informative and precise.

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  • Current Version
  • Nov 19, 2023
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Benjamin Yoon
  • Dec 14, 2016
    Quiz Created by
    JHanley77
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