Occlusion Midterm Sample Questions
In an ideal intercuspal relation, the arrow on the illustration below represents the path take by which cusp of which molar? Cusp.....................Molar A. Mesiofacial.......Second B. Mesiolingual.....Second C. Distofacial........Second D. Distolingual.....Second E. Mesiolingual......Third
D.
A nonworking side interference would be present on which of the following surfaces? A. Inner aspects of a supporting cusp B. Outer aspects of a guiding cusp C. Inner aspects of a guiding cusp D. Outer aspects of a supporting cusp
A.
During axial loading of posterior teeth, cups tips should hit flat areas, such as marginal ridges or fossa. A. True B. False
A.
This movement occurs in the inferior joint compartment? A. Translation B. Rotation C. Gliding D. Rotation and Translation E. Gliding and Translation
B.
From a proximal view, which of the following permanent teeth tends to be positioned in the arch with its axis most nearly vertical? A. Maxillary canine B. Maxillary lateral incisor C. Maxillary central incisor D. Mandibular lateral incisor E. Mandibular central incisor
A.
Illustrated is a frontal border tracing of a px with canine -guided occlusion. Which letter on the diagram defines the only point where posterior tooth contact occurs?
A.
Which extrinsic muscle of the tongue functions to retract the tongue? A. hyoglossus B. styloglossus C. genioglossus D. palatoglossus
B.
In an ideal intercuspal relation, the lingual cusp of the maxillary second premolar contacts the A. distal fossa of the mandibular second premolar B. mesial marginal ridge of the mandibular first molar C. distal marginal ridge of the mandibular second molar D. distal marginal ridge of the mandibular first premolar
A.
In an ideal intercuspal relation, the mesiolingual cusp of the maxillary first molar contacts the mandibular first molar in (on) the A. central fossa. B. distal fossa. C. mesial fossa. D. mesial marginal ridge. E. distal marginal ridge.
A.
In an ideal intercuspal relation, the tip of the mesiofacial cusp of the maxillary second molar opposes which of the following? A. Facial groove of the mandibular second molar B. Distofacial developmental groove of the first molar C. Embrasure between the mandibular first and second molars D. Embrasure between the mandibular second and third molars E. Central fossa
A.
In an ideal occlusion, protrusive contacts can occur on which of the following surfaces? A. Maxillary distal inclines and mandibular mesial inclines B. Maxillary mesial inclines and mandibular distal inclines C. Maxillary distal inclines and mandibular distal inclines D. Maxillary mesial inclines and mandibular mesial inclines
A.
In order to determine arbitrary hinge axis location, a point 13mm anterior to the posterior margin of the tragus on the tragus-canthus line is the: A. Beyron Point B. Gysi Point C. Gypsum Point D. Bergstrom Point E. Frankfort Point
A.
In right lateral excursion, which of the following is correct? A. The mandibular teeth move to the right. B. The mandibular teeth move to the left. C. The left mandibular teeth are on the working side. D. Both A and C. E. Both B and C.
A.
Which of the following characterizes a temporomandibular joint? A. It is immune to arthritis. B. It has one synovial cavity. C. It has two synovial cavities. D. It has no synovial cavities.
C.
In which Angle classification would you typically find a deep overbite with proclined maxillary central incisors? A. Class I B. Class II, division I C. Class II, division II D. Class III, division I E. Class III, division II
B.
A facebow is a caliper-like instrument used to record the _____i______ of the _______ii______ to the ______iii________ and then transfer this relationship to an articulator. A. i. spatial relationship, ii. maxillary arch, iii. rotational hinge axis B. i. temporal relationship, ii. maxillary arch, iii. condylar angle C. i. temporal relationship, ii. mandibular arch, iii. rotational hinge axis D. i. spatial relationship, ii. mandibular arch, iii. condylar angle
A.
In the full dentition which teeth have only one opposing counterpart? A. Maxillary 3rd molars and mandibular central incisors B. Mandibular 3rd molars and maxillary 3rd molars C. Mandibular 3rd molars and maxillary central incisors D. Mandibular 3rd molars and mandibular central incisors E. Maxillary 3rd molars and maxillary central incisors
A.
Mandibular lateral translation (Bennett movement) occurs during the A. earliest stage of lateral movement. B. latter stage of protrusive movement. C. middle stage of retrusive movement. D. hinge axis movement of the mandible. E. ending stage of exhibiting a border movement.
A.
The dentist instructs the patient, who has a severed left lateral pterygoid muscle, to open wide. The patient's mandible will move in which direction? A. To the left B. To the right C. In a straight protrusive direction D. In a retrusive direction
A.
The maxillary arch is longer than the mandibular arch. The maxillary arch is wider than the mandibular arch. A. Both statements are true B. Both statements are false C. First statement is true, second statement is false C. First statement is false, second statement is true
A.
The terminal hinge position occurs when the condyles are in the most _____ location within the glenoid fossa. A. Anterior and superior B. Anterior and inferior C. Medial and superior D. Lateral and superior E. Posterior and superior
A.
What condylar movement is performed as the mandible moves from a pure protrusive movement from maximum intercuspal position to a maximum protruded position? A. Translation B. Rotation C. Hinge D. Oblique E. Medial and foward
A.
What mandibular position is represented by the point in the frontal view of Posselt envelope of motion below? A. Centric occlusion B. Retruded contact C. Anterior edge-to-edge position D. Maximum opening E. Maximum protrusion
A.
Which of the following devices accurately locates the hinge axis position of the mandible? A. kinematic face bow B. arbitrary face bow C. wax recording device D. average value face bow E. arcon articulator recorder
A.
Which of the following is NOT correctly matched? A. Maxillary lingual cusps are nonfunctional cusps B. Mandibular buccal cusps are functional cusps C. Maxillary lingual cusps are functional cusps D. Maxillary buccal cusps are nonfunctional cusps E. Mandibular lingual cusps are functional cusps
A.
Which of the following jaw positions is determined almost exclusively by the behavior of the musculature? A. Postural B. lntercuspal C. Retruded contact D. Protruded contact
A.
Which position of the mandible is determined primarily by tooth position? A. intercuspal B. centric relation C. physiologic rest D. retruded contact
A.
Which statement regarding the mandible is FALSE? A. It is comprised of 2 mandibular bones fused together. B. It is the largest bone of the face. C. It is the strongest bone of the face. D. It is the only mobile bone of the skull.
A.
You are evaluating maxillary and mandibular CT scans for a patient who has recently had facial trauma. Out of curiosity, you notice the natural inclination of roots within the alveolar bone on the sagittal slices. Which tooth root has the greatest horizontal axial inclination? A. Maxillary central incisor B. Maxillary lateral incisor C. Maxillary canine D. Mandibular central incisor E. Mandibular canine
A.
Regarding the properties of alginate: _______ is the extrusion of water with gel network shrinkage; where _______ is the absorption of water or disinfectant. A. Evaporation / Syneresis B. Syneresis / Imbibition C. Dehydration / Osmosis D. Leaking / Active transport
B.
The bucco-occlusal line of the maxilla occludes in the central fossa of the mandible. The lingo-occlusal line of the mandible occludes in the central fossa line of the maxilla. A. Both statements are true B. Both statements are false C. First statement is true, second statement is false C. First statement is false, second statement is true
B.
The glenoid fossa is an oval cavity or a depression in the A. maxilla, just anterior to the malar process. B. temporal bone, just anterior to the auditory canal. C. mandible, just posterior to the internal oblique ridge.
B.
The muscles of masstication are innervated by which cranial nerve? A. CN IV B. CN V C. CN VII D. CN X
B.
The wear facets on the incisal edges of the mandibular lateral incisors are caused by occlusion with the A. maxillary central incisors only. B. maxillary central and lateral incisors. C. maxillary lateral incisors and canines.
B.
A synovial membrane covers the articular disc, enabling smoother movement along the articular eminence. The glenoid fossa is lined with a layer of hyaline cartilage. 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.
B.
After the alginate has been setting, even in humid storage, for 15-20 minutes distortion begins. Which process is the cause of this? A. Evaporation B. Syneresis C. Imbibtion D. Influx E. Gelation
B.
All of the following statements are true in regards to centric relation except.... A. If the mouth is opened beyond 20-25 mm, then pure rotational movement halts and translation of the mandible begins to occur. B. When the mandible is in centric relation, the condyles rotate around a vertical (frontal) axis. C. Pure rotational movement is commonly referred to as hinge movement and the axis rotated around is called the terminal hinge axis. D. Centric relation is a position that is determined by the condyles.
B.
All of the following statements describe the Curve of Spee except: A. The curvature is best shown from the sagittal view. B. Convex on the mandible and concave on the maxilla. C. Describes the curvature of occlusion. D. The occlusal plane has an antero-posterior curvature. E. All of the above statements are correct.
B.
As the mouth is opened widely, the articular disk moves in what direction in relation to the articular eminence? A. Laterally B. Anteriorly C. Posteriorly D. Medially E. Superiorly
B.
Contraction of the lateral pterygoid muscle produces A. Initial upward closure of the mandible. B. Forward movement of the condyle from the articular fossa. C. Posterior displacement of the condyle from the articular eminence. D. Final forceful closure of the molars through a bolus of food
B.
During a working movement of the mandible, the facial cusp ridges of the maxillary first premolar on the working side oppose which of the following mandibular structures? A. The facial embrasure between the canine and the first premolar B. The distal cusp ridge of the first premolar and the mesial cusp ridge of the second premolar C. The distal cusp ridge of the second premolar and the mesial cusp ridge of the first molar D. The mesiofacial groove of the first molar.
B.
In an ideal intercuspal relation in a normal dentition, each of the following teeth contacts each other EXCEPT one. Which one is this EXCEPTION? A. Maxillary first premolar and mandibular second premolar B. Maxillary first molar and mandibular second premolar C. Maxillary second premolar and mandibular first molar D. Maxillary second molar and mandibular third molar
B.
In an ideal occlusion, the mesiolingual cusp of the mandibular 1st molar articulates with which of the following? A. The distal marginal ridge of the maxillary 2nd premolar B. The lingual embrasure between the maxillary 2nd premolar and 1st molar C. The mesial marginal ridge of the maxillary 1st molar D. The central fossa of the maxillary 1st molar E. The lingual embrasure between the maxillary 1st and 2nd molar
B.
In the mandibular fossa, how are the condyles positioned when in centric relation? A. superior and posterior B. superior and anterior C. inferior and posterior D. inferior and anterior
B.
Which is not a characteristic of the masseter muscle? A. It elevates and/or stabilizes the mandible when contracting B. It is a weak muscle, only contributing marginally to mastication C. It originates on the zygomatic arch D. It inserts on the lateral surface of the ramus E. Its blood supply is from a branch of the maxillary artery
B.
Which ligament helps retain the condyle within the glenoid fossa? A. Sphenomandibular ligament B. Temporomandibular ligament C. Stylomandibular ligament D. Pterygomandibular ligament
B.
Which of the following best describes a Bennett shift? A. The lateral movement of the working-side condyle in the opposite direction of the excursive movement B. The lateral movement of the working-side condyle in the same direction of the excursive movement C. The anterior translation of both condyles during protrusive movement D. The anterior translation of the contralateral condyle during lateral excursive movement E. The anterior translation of the ipsilateral condyle during lateral excursive movement
B.
Which of the following occurs when the distofacial cusp of a permanent mandibular right first molar moves through the facial groove from the central fossa of the maxillary right first molar? A. Direct lateral excursion to the left B. Direct lateral excursion, to the right C. Direct protrusive mandibular excursion D. Lateral-protrusive excursion to the left E. Lateral-protrusive excursion to the right
B.
Which of the following regions in the sagittal view of Posselt envelope of motion below represents a free opening or closing of the mandible?
B.
If you are doing a complex full mouth restoration on a patient, the best articulator to use in terms of the most accurate would be the: A. Semi-adjustable Articulator B. Simple/ Hinge/ Non Adjustable Articulator C. Fully-Adjustable Articulator D. Arbitrary Face-Bow
C.
In a Class II occlusal relationship, the tip of the facial cusp of a mandibular first premolar lies directly below the contacting area between which maxillary teeth? A. Canine and lateral incisor B. Canine and first premolar C. First and second premolars D. Second premolar and first molar
C.
In an ideal intercuspal position, the distofacial cusp of a maxillary first molar opposes which feature on a mandibular first molar? A. The distal cusp B. The distofacial cusp C. The distofacial developmental groove D. The mesiofaciai developmental groove
C.
In an ideal occlusion, maxillary posterior tooth buccal cusps oppose A. marginal ridges only B. marginal ridges and fossae C. grooves and embrasures D. grooves and marginal ridges
C.
Pick the following correct statements when considering border and functional movements in a sagittal plane: I. The posterior border is comprised of the condyles rotating, then translating forward and down the articular eminence until maximum opening is achieved. II. The anterior border represents movement from maximum opening to maximum intercuspation. III. The superior border movement is determined by tooth contacts. IV. The chewing stroke starts at postural position. A. I, II, and III. B. I, II, and IV. C. I and III. D. All of the above. E. None of the above.
C.
The Bennett movement is best described as the A. medial shift of the working condyle. B. lateral movement of the non-working condyle. C. bodily shift of the mandible in the direction of the working condyle. D. bodily shift of the mandible in the direction of the non-working condyle.
C.
The TMJ is what type of joint? A. Synovial synarthrosis B. Synovial amphiarthrosis C. Synovial diarthrosis D. None of the above
C.
The temporalis is divided into 3 portions. Which of the following statements correctly matches function with the specific division of the temporalis muscle? A. Middle Temporalis; aids only in retrusion of the mandible B. Posterior Temporalis; mandible is raised vertically C. Middle Temporalis; elevates and retrudes the mandible D. Posterior Temporalis; elevates and retrudes the mandible E. Anterior Temporalis; aids only in retrusion of the mandible
C.
The tissue found above the condylar head and below the articular fossa of the TMJ is called the A. acapsule B. temporomandibular ligament C. articular disk D. sphenomandibular ligament E. lateral pterygoid muscle
C.
When a protrusive mandibular movement (anterior teeth edge-to-edge) is achieved, the mandibular first molar has the potential to contact which of the following maxillary teeth? A. first and second premolars B. second premolar only C. second premolar and first molar D. first and second molars E. second molar only
C.
Which division of cranial nerve V innervates the muscles of mastication? A. V1 B. V2 C. V3 D. All of the above
C.
Which of the following BEST describes the Curve of Spee? A. The spherical configuration of the composite arrangement of the occlusal surfaces and incisal edges of the teeth of both dental arches B. The facial-lingual curvature resulting from the facial cusps being the longest in the mandibular arch, and the lingual cusps being the longest in the maxillary arch C. The anterior-posterior curvature of the occlusal surfaces of the teeth, as seen in a facial view D. The inclination of the teeth in relation to the vertical long axis of the body E. The composite arrangement of the facial crown surface heights of contour of all the teeth in any quadrant
C.
Which of the following describes the anatomic progression from mandibular first to third molars? A. the roots become more divergent B. the crowns and roots become longer C. the crowns and roots become shorter D. the crowns become longer, but the roots get shorter E. the crowns become shorter, but the roots get longer
C.
Which of the following is an acceptable method of accelerating the set time of Gypsum? A. Increasing the Temperature of the water B. Lowering the water to powder ratio C. Using slurry water as a substitute for tap water D. Mixing for an additional 45 seconds E. B and C
C.
Which of the following is an important reference point and is the only rotational movement that can be isolated clinically? A. Rotation in the Horizontal plane around a vertical (frontal) axis B. Rotation in the Frontal plane around a sagittal axis C. Rotation in the Sagittal Plane around a horizontal axis D. Rotation in the Horizontal plane around a horizontal axis
C.
Which of the following jaw positions is determined almost exclusively by the behavior of the musculature? A. Centric occlusion B. Centric relation C. Postural position D. All of the above
C.
Which of the following points in the horizontal view of Posselt envelope of motion below is the anterior edge-to-edge position?
C.
Which of the following statements has the largest contribution to the convexity of the maxillary arch? A. The mesial incline of the maxillary premolars. B. The labially incline of the canines. C. The tilt of the maxillary molars being distal and labial. D. Due to an upward thrust of the tongue. E. The anterior teeth of the mandibular arch, especially the cental incisor.
C.
Which two muscles form a sling around the mandible? A. Masseter and temporalis B. Medial pterygoid and lateral pterygoid C. Masseter and medial pterygoid D. Masseter and lateral pterygoid E. None of the above
C.
All of the following are true about the non-working side condyle during lateral movement of the mandible except: A. It orbits around the working side condyle. B. It is on the side opposite to which the mandible moves C. It moves downward, forwards, and medially D. All of the above are true E. None of the above are true
D.
Anterior guidance allows only the molars to disarticulate during protrusive movement. Cusp length is generally longest with a deep overbite and minimal overjet. 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.
D.
During working-side excursion, the distobuccal cusp of the maxillary 1st molar passes through which of the following? A. Lingual groove of the mandibular 1st molar B. Lingual embrasure between the mandibular 1st and 2nd molar C. Buccal groove of the mandibular 1st molar D. Distobuccal groove of the mandibular 1st molar E. Buccal embrasure between the mandibular 1st and 2nd molar
D.
Imagine you work in a dental office and a patient comes in needing a maxillary nightguard. After taking the impression, you pour up the cast, and then you send it off to a special dental lab to fabricate the nightguard. When the patient returns to try in the nightguard, it's too big! Assuming the impression was taken properly and no mistakes were made by the dental lab, what could you have done wrong when pouring the casts? A. Your water/powder ratio was too high, and the cast had shrunk too much. B. Your water/powder ratio was too high, and the cast had expanded too much. C. Your water/powder ratio was too low, and the cast had shrunk too much. D. Your water/powder ratio was too low, and the cast had expanded too much.
D.
In an acquired Class III crossbite relationship, as the mandible retrudes, the maxillary lateral incisor contacts which of the following teeth? A. Central incisor B. Lateral incisor C. Central and lateral incisors D. Canine and lateral incisors
D.
In an ideal intercuspal relation, the oblique ridge of the maxillary first molar opposes which structure of the mandibular molar? A. The interproximal area between first and second B. The developmental groove between the mesiofacial and distofacial cusps of the first C. The developmental groove between the mesiolingual and distolingual cusps of the first D. The developmental groove between the distofacial and distal cusps of the first
D.
In an ideal occlusion, the lingual cusp of the mandibular 2nd premolar sits between which of the following? A. Marginal ridges of the maxillary 1st and 2nd premolar B. Marginal ridges of the maxillary 2nd premolar and 1st molar C. Central fossa of the maxillary 2nd premolar D. Lingual embrasure of the maxillary 1st and 2nd premolar E. Lingual embrasure of the maxillary 2nd premolar and 1st molar
D.
In normal occlusion, and in a left working movement, the mesiofacial cusp of the maxillary left second molar passes through which of the following mandibular structures? A. The embrasure between the left first and second premolars B. The embrasure between the left first and second molars C. The facial groove of the left first molar D. The facial groove of the left second molar E. The distofacial groove of the left first molar
D.
In the diagram of Posselt's envelope of motion, maximum intercuspal position is the A. lowest point. B. most anterior point. C. most posterior point. D. most superior point.
D.
Moving the mandible from a maximum intercuspal position to a retruded contact position usually results in A. increased occlusal vertical dimension. B. increased horizontal overlap. C. decreased vertical overlap. D. all of these.
D.
The temporomandibular joint is a compound joint that includes A. Condyle and squamous portion of the temporal bone B. Condyle, squamous portion of the temporal bone, and the zygomatic arch C. Coronoid process and squamous portion of the temporal bone D. Condyle, squamous portion of the temporal bone, and the articular disc E. Coronoid process, squamous portion of the temporal bone, and the articular disc
D.
When opening the mandible the movement is __________, during the first ___________ mm and subsequent opening is ____________ movement? A. Translation, 20-25, pure rotation B. Pure rotation, 30-40, translation C. Translation, 30-40, pure rotation D. Pure rotation, 20-25, translation
D.
Which muscle is primarily involved when the mandible makes a RIGHT WORKING movement? A. Right medial pterygoid B. Left medial pterygoid C. Right lateral pterygoid D. Left lateral pterygoid
D.
Which muscle of mastication is matched with its correct origin? A. Stylohyoid: posterior border of styloid process B. Medial (Internal) Pterygoid: outer surface of the lateral ptyergoid plate C. Temporalis: temporal fossa and medial surface of the skull D. Masseter: zygomatich arch
D.
Which of the following covers the articulating osseous structures of the temporomandibular joint? A. Synovial membrane B. Hyaline cartilage only C. Vascular fibrous connective tissue D. Dense avascular fibrous connective tissue E. Dense avascular elastic connective tissue
D.
Which of the following ligaments has an outer oblique portion which limits the extent of jaw opening and initiates translation of the condyle down the articular eminence? A. Capsular B. Collateral C. Stylomandibular D. Temporomandibular
D.
Which of the following muscles is NOT an elevator of the mandible? A. Temporal B. Masseter C. Medial pterygoid D. Lateral pterygoid
D.
Which of the following positions would yield the smallest measurement of vertical dimension? A. Reverse overlap B. Edge-to-edge C. Retruded contact D. Maximum intercuspation
D.
In an ideal intercuspal relation, the mesiofacial cusps of the mandibular second molars contact the maxillary molars in (on) the A. distal fossae of the second. B. central fossae of the second. C. lingual embrasures between the first and second. D. facial embrasures between the first and second. E. mesial marginal ridges of the second.
E.
Protrusive movement is produced primarily because of contracture of which of the following muscles? A. Masseter B. Mylohyoid C. Temporalis D. Medial pterygoid E. Lateral pterygoid
E.
The arrows of the illustration below represent the path taken by the opposing contacting cusps. The mandibular movement indicated is A. protrusive B. right lateral; working side C. left lateral; working side D. right lateral; non-working side E. left lateral; non-working side
E.
The incisal edge (cusp tip) is positioned more to the lingual of the root axis line in which of the following teeth? A. Maxillary incisors B. Mandibular incisors C. Maxillary canine D. Mandibular canine E. B and D
E.
What can be measured during lateral extrusion? A. Condylar angle B. Fisher's angle C. Bennett angle D. Both A. and B. E. Both A. and C.
E.
Which of the following teeth have long axes positioned with their root apices facial and their crowns lingual? A. Maxillary incisors B. Mandibular incisors C. Maxillary premolars D. Maxillary molars E. Mandibular molars
E.
