Morph & Occlusion practice final

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Morph & Occlusion practice final
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2012-06-12 18:20:59
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Morph Occlusion practice final
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Morph & Occlusion practice final
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  1. 1. When waxing the facial surface of tooth #8, the best guide to developing correct anatomical form is the:
    • A. Facial surface of tooth #7.
    • B. Lingual surface of tooth #9.
    • C. Facial surface of the opposing tooth #25.
    • D. Lingual surface of tooth #10.
    • E. Facial surface of tooth #9.
  2. E
  3. 2. The ML cusp of tooth #15 contacts the:
    • A. Mesial fossa of tooth #20.
    • B. Distal fossa of tooth #30.
    • C. Distal fossa of tooth #18.
    • D. Mesial marginal ridge of tooth #19.
    • E. Central fossa of tooth #18.
  4. E
  5. 3. Which of the following tooth components go to form the oblique ridge?
    • A. Triangular ridge of the MB cusp and the triangular ridge of the DB cusp.
    • B. Distal cusp ridge of the MB cusp and the triangular ridge of the ML cusp.
    • C. Triangular ridge of the MB cusp and the distal cusp ridge of the DL cusp.
    • D. Mesial cusp ridge of the DB cusp and the mesial cusp ridge of the DL cusp.
    • E. Distal cusp ridge of the ML cusp and the triangular ridge of the DB cusp.
  6. E
  7. 4. All of the following are consequences of missing the interproximal contacts on a dental restoration EXCEPT:
    • A. Will result in a make over of your restoration.
    • B. Wide appearance.
    • C. Gingival irritation.
    • D. Tooth movement.
    • E. Food impaction.
  8. B
  9. 5. We can make an anterior tooth look as though it fits the allotted space by adjusting the:
    • A. Incisal edge toward the gingival.
    • B. Position the interproximal contacts toward the incisal.
    • C. Facial height of contour toward the facial.
    • D. Facial line angles toward or away from the center of the tooth.
    • E. Lingual marginal ridges toward the center of the tooth.
  10. D
  11. 6. Which of the following cusps on the occlusal aspect of a maxillary first molar contributes to both the transverse ridge and the oblique ridge?
    • A. MB
    • B. ML
    • C. DB
    • D. DL
    • E. Cusp of Carabelli
  12. B
  13. 7. Which of the following cusps make marginal ridge contacts with the opposing arch?
    • A. MB cusps of maxillary molars
    • B ML cusps of maxillary molars
    • C. Lingual cusps of maxillary premolars
    • D. DB cusps of mandibular molars
    • E. MB cusps of mandibular molars
  14. E
  15. 8. Which of the following clinical situations will allow you to incorporate longer, steeper cusps into a full crown molar wax-up?
    • A. Large overjet
    • B. Deep overbite
    • C. Anterior open bite
    • D. Shallow condylar angle
    • E. Excessive wear on the anterior teeth
  16. A
  17. 9. When checking the occlusion on a restoration with articulating paper, there is a tripod contact in the distal fossa on tooth #29. If this tripod contact was on the contra lateral side, where would this contact come from?
    • A. The buccal cusp of #28.
    • B. The DB cusp of #19.
    • C. The MB cusp of #14.
    • D. The L cusp of #13.
    • E. The DL cusp #20.
  18. D
  19. 10. In a left lateral movement of the mandible, the distobuccal cusp of #30 will passthrough the:
    • A. Buccal groove of #3.
    • B. Buccal groove of #2.
    • C. Lingual groove of #3.
    • D. Facial embrasure between #2 and #3.
    • E. Facial embrasure between #3 and #4.
  20. c
  21. 11. The smallest cusp of tooth #19 is the:
    • A. Distal cusp.
    • B. Distofacial.
    • C. Mesiofacial.
    • D. Distolingual
    • E. Cusp of Carabelli.
  22. A
  23. 12. What is the order in increasing size (smallest to largest) of the cusps of the maxillary first molar?
    • A. DL-ML-DB-MB
    • B. MB-DL-ML-DB
    • C. DL-DB-MB-ML
    • D. MB-DL-ML-DB
    • E. DB-MB-DL-ML
  24. C
  25. 13. The names of the embrasures between tooth #7 and #8 are the following except:
    • A. Occlusal
    • B. Incisal
    • C. Facial
    • D. Cervical
    • E. Lingual
  26. A
  27. 14. An upper first premolar was extracted several months ago and to this day hasn’t been replaced. Due to mesial drift of the upper second premolar, the space has become narrower than the original space. Esthetically, the following must be done to make the tooth look as though it fits the space.
    • A. The distal cusp ridge of the buccal cusp is made longer than the mesial cusp ridge of the buccal cusp.
    • B. The buccal cusp is made shorter toward the gingival.
    • C. The mesial marginal ridge is made smaller buccolingually.
    • D Bring the buccal cusp toward the mesial.
    • E. The mesial cusp ridge of the buccal cusp is made longer than the distal cusp ridge of the buccal cusp.
  28. E
  29. 15. What is the only dimension which is greater on the mandibular canine compared with the maxillary canine?
    • A. Mesiodistal
    • B. Buccolingual
    • C. Incisocervical
    • D. Faciolingual
    • E. Occlusogingival
  30. C
  31. 16. Which tooth when viewed from the incisal edge looks as though it is twisted lingually on its root?
    • A. Mandibular central incisor.
    • B. Maxillary lateral.
    • C. Maxillarycanine.
    • D. Mandibular lateral incisor.
    • E. Mandibular third molar.
  32. D
  33. 17. How do you make a masculine tooth look more feminine?
    • A. Bring the line angles on the facial out.
    • B. Make the buccal surface flatter.
    • C. Round off the incical point angles.
    • D. Make the teeth squarer.
    • E. Indent the incisal edge in the center of the tooth.
  34. C
  35. 18. You have just placed a gold crown on tooth #18 and the patient complains of a problem biting her cheek. The crown is thick enough so that it is possible to adjust. What can you do to help alleviate this problem?
    • A. Send crown back to lab for adjusting.
    • B. Make the buccal cusps lean more lingually.
    • C. Take the entire occlusal out of occlusion.
    • D. Take new impression and do over.
    • E. Extract the tooth.
  36. B
  37. 19. A class II MO amalgam restoration on tooth #5 has just been completed and the rubber dam has been removed. While checking the occlusion the mesial marginal ridge cracks in the mesial box area. What did you forget to do that possibly would have prevented this from happening?
    • A You didn’t make the mesial marginal ridge of the amalgam the same height as the adjacent distal marginal ridge.
    • B. You flossed too soon.
    • C. You used a piece of bread to check the bite.
    • D. You told the patient to bite on a piece of caramel candy.
    • E. None of the above.
  38. A
  39. 20. All of the following may be clinical consequences of overly large interproximal contacts on an anterior tooth EXCEPT:
    • A. Difficulty using floss.
    • B. Damage to the periodontium.
    • C. Poor esthetics.
    • D. Mesial drift.
    • E. Overfilled gingival embrasure.
  40. D
  41. 21. If a patient with an actual Bennett angle of 8 degrees (on both sides) had casts mounted on a semi- adjustable articulator with the right Bennett angle set to 4 degrees, and the left Bennett angle set to 10 degrees, a crown restoration on tooth #30 fabricated with these articulator settings would have the following consequences:
    • A. The facial inclines of the lingual cusps would interfere with the opposing cusps during laterotrusion.
    • B. The lingual inclines of the facial cusps would interfere with the opposing cusps during mediotrusiuon.
    • C. The lingual inclines of the lingual cusps would interfere with the opposing cusps during laterotrusion.
    • D. The facial inclines of the facial cusps would interfere with the opposing cusps during mediotrusiuon.
    • E. The lingual inclines of the facial cusps would interfere with the opposing cusps during laterotrusiuon.
  42. ?
  43. 22. Setting the ISS (immediate side-shift) on the articulator to 2 mm, when the patient’s actual ISS is 0.5 mm will:
    • A. Potentially provide the patient with a lower frequency of posterior interferences during left and right excursvive movements.
    • B. Create problems with central grooves being too narrow for comfortable function.
    • C. Require a steeper angle of anterior guidance.
    • D. Produce restorations with steeper cusp inclinations, which would likely lead to interferences during mediotrusive movements.
    • E. Have minimal effect on marginal ridge, central fossa and central groove dimension and morphology.
  44. A
  45. 23. The steeper the condylar guidance is:
    • A. The taller the posterior cusps must be.
    • B. The taller the posterior cusps may be.
    • C. The shorter the posterior cusps must be.
    • D. The shorter the posterior cusps may be.
  46. C
  47. 24. The shallower the condylar guidance is:
    • A. The taller the posterior cusps must be.
    • B. The taller the posterior cusps may be.
    • C. The shorter the posterior cusps must be.
    • D. The shorter the posterior cusps may be.
  48. C
  49. 25. According to Okeson’s definition of Optimal Occlusion:
    • A. Lateral loading occurs on posterior teeth.
    • B. Centric relation is not coincident with Intercuspal Position.
    • C. Anterior contacts are the same magnitude as posterior contacts.
    • D. Anterior and posterior teeth participate equally in protrusive guidance.
    • E. Canine guidance exists with laterotrusive movements, but not mediotrusive movements.
  50. E
  51. 26. The pathway taken by the incisal edges of mandibular anterior teeth across the lingual surfaces of the opposing maxillary anterior teeth during ideal/normal protrusion runs in a direction from __________to _________?
    • A. Cervical, incisal.
    • B. Incisal, cervical.
    • C. Mesial, distal.
    • D. Distal, mesial.
    • E. None of the above - during ideal protrusion, no contacts should occur on the anterior maxillary lingual surfaces.
  52. A
  53. 27. Centric Relation:
    • A. Is a theoretical position of the jaws and cannot be accurately recorded.
    • B. Is a condylar position.
    • C. Equals ICP.
    • D. Occurs when the teeth first touch.
    • E. Provides the clinician with diagnostic information about the probability of future pathological changes to the masticatory system.
  54. B
  55. 28. The articulator fossae of the Stratos 300:
    • A. Allow for condylar, progressive side-shift and top wall adjustments.
    • B. Are limited to a fixed 1.0 immediate side-shift.
    • C. Allow for condylar inclination angle, PSS, and ISS adjustments.
    • D. Have a fixed medial wall.
    • E. Have an adjustable rear wall.
  56. C
  57. 29. A patient with actual condylar inclination angles of 33 degrees on both sides, and an undetermined immediate side-shift should have the articulator condylar settings positioned at ______ for the fabrication of posterior crowns to reduce posterior interferences during function:
    • A. 25 degrees, with 0.5 mm ISS.
    • B. 25 degrees, with 1.5 mm ISS
    • C. 33 degrees, with 1.0 mm ISS.
    • D. 40 degrees, with 0.5 mm ISS.
    • E. 40 degrees, with 1.5 mm ISS.
  58. B
  59. 30. During a right laterotrusive movement:
    • A. The right condyle is orbiting.
    • B. The left condyle is rotating.
    • C. The steepness of the facial inclines of the lingual cusps of #3 is critical.
    • D. All of the above.
    • E. None of the above.
  60. E
  61. 31. During a lateriotrusive movement on the right side of the mandible with optimal occlusion:
    • A. The lingual surface of tooth #6 is providing canine guidance.
    • B. The facial surface of tooth #27 is contacting it’s opposing tooth.
    • C. The left condyle is orbiting.
    • D. All of the above.
    • E. None of the above.
  62. D
  63. 32. Which posterior cusp inclines are most likely to me involved in protrusive interferences?
    • A. Mesial
    • B. Desital
    • C. Facial
    • D. Lingual
  64. A
  65. 33. Which maxiallary posterior cusp inclines are most likely to me involved in mediotrusive interferences?
    • A. Mesial
    • B. Desital
    • C. Facial
    • D. Lingual
  66. C
  67. 34. The Transfer Jig Assembly contains the:
    • A. Vertical and horizontal rods.
    • B. Articulator index.
    • C. Bite fork.
    • D. Two of the above.
    • E. All of the above.
  68. E
  69. 35. During cast mounting:
    • A. The mandibular cast is mounted first.
    • B. The incisal pin is raised 2 mm.
    • C. The articulator index is utilized.
    • D. Two of the above.
    • E. All of the above.
  70. C
  71. 36. During the formation of gypsum products from raw materials:
    • A. CaSO4 reacts with water to form Ca2+SO3.
    • B. Two water molecules form a hemihydrate compound.
    • C. Heat is generated (released).
    • D. The starting mineral gypsum is a hemihydrate form of calcium sulfate.
    • E. None of the above.
  72. E
  73. 37. During the setting reaction of plaster:
    • A. CaSO4 reacts with water to form Ca2+SO3.
    • B. Two water molecules form a hemihydrate compound.
    • C. Heat is generated (released).
    • D. The starting gypsum is a dihydrate form of calcium sulfate.
    • E. All of the above.
  74. C
  75. 38. During the mixing and setting reaction of Die Stone:
    • A. Increased water/powder ratio decreases strength
    • B. Decreased spatulation, decreases setting time.
    • C. Increased water temperature has no effect on strength.
    • D. Increased water/powder ratio increases setting expansion.
    • E. None of the above.
  76. A,C
  77. 39. Plaster is stronger than:
    • A. Stone.
    • B. Improved (die) Stone.
    • C. Both of the above.
    • D. Neither of the above.
  78. D
  79. 40. Which gypsum final product exhibits the most expansion during setting?
    • A. Plaster.
    • B. Stone.
    • C. Improved (Die) Stone
  80. A

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