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Fixed Prosthodontics > Digital imaging > Flashcards

Digital imaging 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:

A
  1. CEREC Primescan, Omnicam, Bluecam (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 & 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 as ceramics, zirconias, alloys, resins or wax:

A

Milling machine

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10
Q

CEREC system is used to create:

A

inlays, onlays, crowns & bridges

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11
Q

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

A

Visible blue light (LED) & powder

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12
Q

What is the imaging technique differences for CEREC Omnicam vs. CEREC Bluecam?

A

Omnicam: continuous data aquisition

Bluecam: 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; multiunit restoration on natural teeth; implant restorations; & Removable prosthesis

A

True

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20
Q

What CAD/CAM more cost effective?

A

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

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21
Q

T/F: The only disadvantage to CAD/CAM is the 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/CA, technology have acceptable results for:

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 intraoral scanner?

A

Direct data acquisition

26
Q

What type of CAD/CAM data acquisition can be described as the data is obtained in the lab either from an impression or 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 & 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 capacity

A

False- already showing improvements in workflow

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 work flow 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 below:

-Digital imaging (X-rays, sensors)

A

Step 1- diagnostics

35
Q

What step of the digital workflow process is being described below:

-Digital intraoral scanner

A

Step 2: Treatment planning

36
Q

What step of the digital workflow process is being described below:

-3D software

A

Step 3: Design

37
Q

What step of the digital workflow process is being described below:

-Milling/3D printing

A

Step 4: Fabrication

38
Q

What step of the digital workflow process is being described below:

-Completed crown

A

Step 5: Delivery

39
Q

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

-file sent to lab
-finsish
-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 for lab
  7. Seat crown (second appointment)
40
Q

Compare the initial cost of conventional vs. digital workflow:

A

Analogue: Initial cost - includes VPS & registration materials (~$50)

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

41
Q

Compare the additional cost of conventional vs. digital workflow:

A

Analogue: Additional costs- includes trays, dispensers, stone, lab cost, shipping

Digital: Additional costs- includes electronic la prescriptions, blocks, bur, 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 & for implants for conventional workflow- compare this to digital:

A

Analogue:
teeth- around 41 min
implants- around 43 min

Digital
teeth- around 13 min
implants- around 30 min

44
Q

What factors contribute to the chairside time with conventional workflow?

A
  1. tray selection or custom tray
  2. mixing time
  3. setting time
  4. remake
  5. opposing arch
  6. inter-occlusal records
  7. disinfection
  8. shipping time
45
Q

What factors contribute to the chairside 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 the the longer laboratory time required for conventional workflow?

A
  1. disinfection
  2. pour the impressions
  3. setting time
  4. mount casts
  5. ditch the dies
  6. wax-up & fabrication
  7. shipping
  8. restoration
48
Q

What contributes the 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 workflows (3)

A

1.) tissue displacement
2.) dry field
3.) 0.5mm 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 & ______
  3. _____ are still recommended for full arch restorations
A
  1. crowns & FPDs
  2. shortened treatment times
  3. conventional impressions
51
Q

According to studies:

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

A

No significant difference

52
Q

According to studies:

marginal & internal gaps with conventional techniques were _____ than the digital techniques

A

Greater than

53
Q

According to studies:

the digital impression technique provided ______ marginal & internal fit of fixed restorations compared to conventional techniques

A

better

54
Q

Conclusions from multiple 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 & 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. improved 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 (13 decks)

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