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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
What type of CAD/CAM data acquisition can be described as the data is obtained from the patients mouth via intraoral scanner?
Direct data acquisition
26
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?
Indirect data acquisition
27
CAD/CAM files that are NOT dependent on the manufacturer, and can be used with any software to fabricate the final restoration:
Open files
28
CAD/CAM files that are controlled & manipulated by the owner/manufacturer:
Closed files
29
Is a provisional needed for a chair-side production utilizing CAD/CAM?
No
30
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
False- already showing improvements in workflow
31
T/F: Intraoral scanning is faster and substantially more comfortable compared to old school impressions
True
32
Intraoral scanners can greatly increase:
1. productivity 2. efficiency 3. accuracy
33
List the steps of the digital work flow process:
1. diagnostics 2. treatment planning 3. design 4. fabrication 5. delivery
34
What step of the digital workflow process is being described below: -Digital imaging (X-rays, sensors)
Step 1- diagnostics
35
What step of the digital workflow process is being described below: -Digital intraoral scanner
Step 2: Treatment planning
36
What step of the digital workflow process is being described below: -3D software
Step 3: Design
37
What step of the digital workflow process is being described below: -Milling/3D printing
Step 4: Fabrication
38
What step of the digital workflow process is being described below: -Completed crown
Step 5: Delivery
39
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
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
Compare the initial cost of conventional vs. digital workflow:
Analogue: Initial cost - includes VPS & registration materials (~$50) Digital: Initial cost- includes scanner ($20-30k) & milling unit ($110-120k)
41
Compare the additional cost of conventional vs. digital workflow:
Analogue: Additional costs- includes trays, dispensers, stone, lab cost, shipping Digital: Additional costs- includes electronic la prescriptions, blocks, bur, maintenance
42
What has more chair side time- Conventional or digital workflow?
Conventional (analogue)
43
What is the chair side time for teeth & for implants for conventional workflow- compare this to digital:
Analogue: teeth- around 41 min implants- around 43 min Digital teeth- around 13 min implants- around 30 min
44
What factors contribute to the chairside time with conventional workflow?
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
What factors contribute to the chairside time with digital workflow?
1. learning curve 2. scan (prep, opposing & buccal) 3. evaluate the scan 4. rescan 5. lab prescription
46
Which requires more laboratory time- digital or conventional workflow?
Conventional (analogue)
47
What contributes the the longer laboratory time required for conventional workflow?
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
What contributes the the shorter laboratory time required for digital workflow
1. received electronically 2. design 3. cast & prosthesis 4. restoration
49
______ is a MUST for both workflows (3)
1.) tissue displacement 2.) dry field 3.) 0.5mm of uncut tooth structure apical to the finish line
50
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
1. crowns & FPDs 2. shortened treatment times 3. conventional impressions
51
According to studies: _____ was observed regarding the marginal gap of single-unit ceramic restorations obtained from digital or conventional impression techniques
No significant difference
52
According to studies: marginal & internal gaps with conventional techniques were _____ than the digital techniques
Greater than
53
According to studies: the digital impression technique provided ______ marginal & internal fit of fixed restorations compared to conventional techniques
better
54
Conclusions from multiple studies state that Digital impressions:
1. are more accurate 2. are more time effective 3. provide excellent clinical results 4. allows for immediate evaluation of prep & margins
55
T/F: Digital techniques show superior accuracy
True
56
Some advantages of the optical/digital technique include: (4)
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
T/F: For full arch impressions digital impressions should be used but conventional impressions can be clinically acceptable too
False- digital impressions can be clinically acceptable but you should use conventional impressions
58

Fixed Prosthodontics (13 decks)

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