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Fixed Prosthodontics I > Digital Dentistry > Flashcards

Digital Dentistry Flashcards

1
Q

The use of computer programs to create two- or three-dimensional (2D or 3D) graphical representations of physical objects:

A

CAD (Computer Aided Design)

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2
Q

The use of computer software to control machine tools and related machinery in the manufacturing of work pieces:

A

CAM (Computer Aided Manufacturing/Milling)

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3
Q

What do we need in order to apply the digital imaging concept to practice? (3)

A
  1. intra oral scanner
  2. designing software
  3. production unit
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4
Q

A production unit that works via 3D printing is considered:

A

Additive

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5
Q

A production unit that works via milling is considered:

A

subtractive

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6
Q

Available digital imaging systems include: (6)

A
  1. CEREC Prime Scale, Omnicam, Bluecame (Sirona)
  2. Tiors, 3 Shape (3D Biocad)
  3. iTero digital scanner
  4. E4D Dentist
  5. Medit
  6. Lava COS
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7
Q

Requirements of intraoral scanner include: (4)

A
  1. easy to use
  2. accuracy
  3. software capability and speed
  4. cost
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8
Q

The use of additive manufacturing to create dental prosthesis such as aligners, dentures, and crowns:

A

3D printing

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9
Q

Designed to cut crowns, bridges, copings, frameworks, implant abutments and more from materials such ceramics, zirconia, alloys, resins or wax:

A

Milling machine

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10
Q

CEREC system is used to create:

A

inlays, onlays, crowns, and bridges

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11
Q

What type of light is used with CEREC? What else is required?

A

Visible blue light (LED) and powder

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12
Q

What is the imaging technique differences for Cerec omnicam vs. Cerec bluecam?

A

Omnicam: continuous data acquisition

Blucecam: multiple shots joined together

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13
Q

Which form of cerec 3D scans IN COLOR?

A

omnicam

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14
Q

Which form of CEREC requires powder?

A

Bluecam

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15
Q

The following advantages coincide with:

  • Powder free
  • Easy handling
  • Precise 3D image in natural color
A

CEREC Omnicam

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16
Q

The following advantages coincide with:

  • High precision
  • Rapid scan in powder coated surfaces
  • Easy to use
A

CEREC Bluecam

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17
Q

What scan procedure does CEREC Primescan utilize?

A

Dynamic depth scan

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18
Q

What scan procedure does CEREC Omniscan utilize?

A

Triangulation

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19
Q

T/F: With CAD/CAM we can do single restorations on natural teeth; multi-unit restorations on natural teeth; implant restorations; and removable prosthesis

A

True

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20
Q

What makes CAD/CAM more cost effective?

A

60-70% savings in lab bills and reduction in labor

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21
Q

T/F: The only disadvantage to CAD/CAM is the slower production process

A

False- CAD/CAM has a faster production process

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22
Q

The multilevel quality improvement through digital technology is recognized in: (4)

A
  1. workflow & efficiency
  2. record keeping
  3. data fidelity
  4. therapeutics
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23
Q

Posterior single tooth restorations fabricated from intraoral scans by using CAD/CAM technology have acceptable results for: (4)

A
  1. shade
  2. contour
  3. marginal adaptation
  4. occlusion
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24
Q

CAD/CAM classification is based on: (3)

A
  1. Data acquisition
  2. Accessibility to STL files
  3. Production of final restoration
25
Q

What type of CAD/CAM data acquisition can be described as the data is obtained from the patients mouth via intra oral scanner:

A

Direct data acquisition

26
Q

What type of CAD/CAM data acquisition can be described as data obtained in the lab either from an impression or a stone cast via bench scanner

A

Indirect data acquisition

27
Q

CAD/CAM files that are NOT dependent on the manufacturer, and can be used with any software to fabricate the final restoration:

A

Open files

28
Q

CAD/CAM files that are controlled and manipulated by the owner/manufacturer:

A

Closed files

29
Q

Is a provisional needed for a chair-side production utilizing CAD/CAM:

A

No

30
Q

T/F: Digital technologies have the potential to improve the workflow from diagnosis, planning to treatment, but are so new they have not reached that capacity.

A

False- already showing improvements in workflow form diagnosis, planning, to treatment

31
Q

T/F: Intraoral scanning is faster and substantially more comfortable (compared to old school impressions)

A

True

32
Q

Intraoral scanners can greatly increase:

A
  1. productivity
  2. efficiency
  3. accuracy
33
Q

List the steps of the digital workflow process:

A
  1. Diagnostics
  2. Treatment Planning
  3. Design
  4. Fabrication
  5. Delivery
34
Q

What step of the digital workflow process is being described?

  • Digital imaging (x-rays & sensors)
A

Step 1: diagnostics

35
Q

What step of the digital workflow process is being described?

  • Digital intraoral scanner
A

Step 2: Treatment planning

36
Q

What step of the digital workflow process is being described?

  • 3D software
A

Step 3: Design

37
Q

What step of the digital workflow process is being described?

  • Milling/ 3D printing
A

Step 4: Fabrication

38
Q

What step of the digital workflow process is being described?

  • Completed crown
A

Step 5: Delivery

39
Q

Put the following in chronological order as they would take place in practice (specify what occurs at first and second appointment)

  • file sent to lab
  • finish
  • receive from lab
  • scan
  • seat crown
  • fabricate restoration
  • design restoration
A
  1. Scan (first appointment)
  2. File sent to lab
  3. Design restoration
  4. Fabricate restoration
  5. Finish
  6. Receive from lab
  7. Seat crown (Second appointment)
40
Q

Compare the initial cost of conventional vs. digital workflow

A

Analogue: Initial cost includes VPS, and registration materials (~$50)

Digital: Initial cost includes scanner (20-30k), and milling unit (110-120k)

41
Q

Compare the additional cost of conventional vs. digital workflow:

A

Analogue: Additional cost includes trays, dispenser, and stone, lab cost, & shipping

Digital: Additional cost includes electronic lab prescriptions, blocks, burs, and maintenance

42
Q

What has more chair side time, conventional or digital workflow?

A

Conventional (Analogue)

43
Q

What is the chair side time for teeth and for implants for conventional workflow? Compare this to digital

A

Analogue:
teeth: ~41 min
implants: ~43 min

Digital
teeth: ~13 min
implants: ~30 min

44
Q

What factors to contribute to the chair side time with conventional workflow?

A
  1. Tray selection or custom tray
  2. Mixing tie
  3. Setting time
  4. Remake
  5. Opposing arch
  6. Inter-occlusal records
  7. Disinfection
  8. Shipping time
45
Q

What factors contribute to the chair side time with digital workflow?

A
  1. Learning curve
  2. Scan (prep, opposing & buccal)
  3. Evaluate the scan
  4. Rescan
  5. Lab prescription
46
Q

Which requires more laboratory time? Digital or conventional workflow?

A

Conventional (analogue)

47
Q

What contributes to the longer laboratory time required for conventional workflow?

A
  1. Disinfection
  2. Pour the infections
  3. Setting time
  4. Mount the casts
  5. Ditch the dies
  6. Wax up and fabrication
  7. Shipping
  8. Restoration
48
Q

What contributes to the shorter laboratory time required for digital workflow?

A
  1. received electronically
  2. design
  3. cast & prosthesis
  4. restoration
49
Q

____ is a MUST for both work flows (3)

A

1) Tissue displacement
2) Dry field
3) 0.5 mm of uncut tooth structure apical to the finish line

50
Q

According to studies,

  1. There was the same level of accuracy for ____ & ____
  2. Digital impressions showed clinically accepted results and ____
  3. ____ are still recommended for full-arch restorations
A
  1. crowns and FPDs
  2. shortened treatment time
  3. conventional impressions
51
Q

According to studies,

_____ was observed regarding the marginal gap of single-unit ceramic restorations obtained fro digital or conventional impression techniques

A

No significant difference

52
Q

According to studies,

Marginal and internal gaps with conventional techniques were ____ than the digital technique

A

Greater than

53
Q

According to studies,

The digital impression technique provided ____ marginal and internal fit of fixed restorations compared to conventional techniques

A

better

54
Q

Conclusions from multiples studies state that digital impressions:

A
  1. Are more accurate
  2. Are more time effective
  3. Provide excellent clinical results
  4. Allows for immediate evaluation of prep and margins
55
Q

T/F: Digital techniques show superior accuracy

A

True

56
Q

Some advantages of the optical/digital technique include: (4)

A
  1. more comfortable for the patient
  2. better marginal fit (both clinically accepted)
  3. improve dentist/lab communication
  4. decrease in turn around time
57
Q

T/F: For full arch impressions, digital impressions should be used but conventional impressions can be clinically acceptable too.

A

False- digital impressions can be clinically acceptable but you should use conventional impressions

58
Q
A

Fixed Prosthodontics I (13 decks)

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