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Occlusion Lecture > Intro to Occlusion > Flashcards

Intro to Occlusion Flashcards

1
Q

What are the different types of restorative materials for teeth?

A
  • DENTAL AMALGAM
  • COMPOSITE MATERIALS
  • GOLD RESTORATIONS (GOLD FOIL)
  • GOLD CASTINGS (INLAYS, ONLAYS, CROWNS)
  • CERAMICS (CROWNS, BRIDGES, VENEERS)
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2
Q

What are the concerns with dental amalgam as a restorative material?

A
  • poor esthetics
  • weakening of tooth from removal of tooth structure
  • recurrent caries
  • no adhesive bonding
  • sensitivity of properties to manipulation
  • brittle nature
  • biocompatibility (not a concern most of the time)
  • wastewater pollution with mercury
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3
Q

What are the advantages of dental composite?

A
  • aesthetics
  • bonding to tooth structure
  • more conservative in preparation of tooth
  • less expensive than ceramic
  • reduced mercury exposure
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4
Q

What are the disadvantages of composite?

A
  • composite shrinks (secondary caries)
  • durability (may not last as long as amalgam)
  • chipping
  • more skill and training
  • needs to be completely dry
  • takes longer
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5
Q

What does bonding allow the dentist to do with composite?

A

change shape, color, and contours

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6
Q

What is the oldest type of filling material available?

A

gold foil

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7
Q

What is the benefit of gold foil?

A
  • can last the lifetime of patient
  • can be placed in one visit in small cavities and will last longer than any other material
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8
Q

What is the disadvantages of gold foil?

A
  • gold is expensive
  • potentially not esthetic
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9
Q

How long will PFM crowns last?

A

Depends on the study!

  • 95% success rate betwen 5-10 years
  • 97.5% success rate at 7 years
  • 95.5% success rate at 7 years
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10
Q

What are the options for tooth replacement?

A
  • complete dentures (with implants)
  • partial dentures (with implants)
  • fixed bridges and single teeth (with implants)
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11
Q

What are the advantages of high strength ceramics?

A
  • broad range of indications
  • excellent clinical performance
  • accepted metal alternative
  • less tooth reduction required
  • thinner coping thickness
  • shading coping options
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12
Q

What is an articulator?

A
  • mechanical device that simulates mandibular movements of condyles in their fossae
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13
Q

Why should you use an articultor?

A
  • diagnosis
  • treatment planning
  • communicate with patients/patient education
  • fabrication of prostheses/restorations
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14
Q

What are the components of an articulator?

A
  • upper member
  • lower member
  • anterior or incisal pin
  • condylar mechanisms
  • mounting ring (guide and retention system)
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15
Q

What are the features of a non adjustable/”hinge” articulators?

A
  • allow only opening/closing movements
  • can be used for single posterior restorations
  • can create a change in closure angle
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16
Q

What are the features of semi-adjustable articulators?

A
  • articulators used the most
  • allow opening and closing
  • movements as well as escursive
  • lateral and protrusive movements
17
Q

What are the types of semi-adjustable articulators?

A

Arcon
- condyles in lower member
- condylar inclination in the upper member
Non Arcon
- condyles on upper membrane
- condylar inclination on the lower member

18
Q

What are the two types of facebows?

A

Kinematic
- locates the true transverse horizontal axis
Arbitrary
- locates the axis by using anatomical landmarks (utilizes average measurements to approximately located the axis of rotation)

18
Q

What is the purpose of a facebow?

A

orient the maxillary cast to the rotational axis in three planes
- result in a reproducable articulation of the subsequent maxillary casts

18
Q

What type of articulator is ours?

A

Arcon Articulator (a type of semi adjustable)

19
Q

What is the transverse horizontal axis (terminal hinge axis)?

A
  • imaginary axis which passes through each of the mandibular condyles
20
Q

Where is the transverse horizontal axis on a human?

A

about 8 mm under the soft tissues in front of the tragus

21
Q

What is the bergstrom point?

A

a point 10 mm anterior to the center of a spherical insert in the external auditory meatus and 7 mm below the frankfor horizontal plane

22
Q

What is the ear-bow?

A

indexes to external auditory meatus and registers the relation of the max arch to these and a horizontal reference plane

23
Q

What is the 3rd point of reference on an ear-bow (facebow)?

A
  • oritents the maxillary cast to a reference plane
  • on the anteior face (should be repeatable and reproducible)
24
Q

What are the different options for the 3rd point of reference with a facebow?

A

orbitale
nasion
maxillary incisor incisal edge
lower edge of the nostril

25
Q

When should you use a facebow?

A
  • cusp teeth are present
  • interocclusal records are made at an increased occlusal vertical dimention

Occlusion Lecture (17 decks)

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