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Fixed > Introduction to Digital Dentistry, Scanning and Digital Workflow for Fixed Prosthodontics > Flashcards

Introduction to Digital Dentistry, Scanning and Digital Workflow for Fixed Prosthodontics Flashcards

1
Q

What is digital dentistry

A

The use of dental technology or device that incorporates digital or computer- controlled components in contrast to that of mechanical or electrical alone

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2
Q

What is included in digital dentistry?

A
  • Tele-dentistry
  • Electronic dental record
  • CBCT
  • Digital radiology
  • Digital impression
  • 3-D printing
  • CAD/CAM
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3
Q

What is CAD (computer aided design)?

A

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

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4
Q

What is CAM (computer aided manufacturing/milling)?

A

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

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5
Q

What is point cloud meshing?

A
  • A collection of data points called a point cloud is used to depict a real-world object
  • Combine multiple scans to create complete model
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6
Q

CAD/CAM is often saved and stored as an _____ file

A

.stl
(Standard Triangulation Language)

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7
Q

What is a standard triangulation language (.stl) file?

A

It is file format which is an openly documented format for describing the surface of an object as a triangular mesh, that is, as a representation of a 3-dimensional surface in triangular facets

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8
Q

What do we need to apply this digital imaging to practice?

A
  • Intra oral Scanner
  • Designing Software
  • Production Unit
    —Additive: 3D Printing
    —Subtractive: Milling
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9
Q

What are the digital imaging and CAD/CAM systems available?

A
  • CEREC Primescan, Omnicam or
    Bluecam (Sirona)
  • Tiors, 3 Shape (3D Biocad)
  • iTero digital scanner
  • E4D Dentist
  • Medit
  • Lava COS
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10
Q

What is the requirements of the intra oral scanner?

A
  • Easy to use
  • Accuracy
  • Software capability and speed
  • Cost
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11
Q

What is 3D printing?

A

It is the use of additive manufacturing to create dental prostheses such as aligners and dentures

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12
Q

What is a milling machine?

A

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

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13
Q

What are the characteristics of the CEREC system?

A
  • Inlays/ Onlays, Crowns, & bridges
  • Visible Blue Light (LEDs)
  • Powder is required for some
    scanners
  • Digital on-screen articulation
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14
Q

What are the different generations of CEREC?

A
  • CEREC Bluecam
  • CEREC Omnicam
  • CEREC Primescan
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15
Q

What are the advantages of the CEREC omnicam?

A
  • powder free
  • easy handling
  • precise 3D image in natural color
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16
Q

What are the advantages of the CEREC Bluecam?

A
  • high precision
  • rapid scan in powder coated surfaces
  • easy to use
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17
Q

What is the imaging technique for CEREC omnicam?

A

continous data acquisition

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18
Q

What is the imaging technique for CEREC Bluecam?

A

multiple shots joined together

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19
Q

How long is a full arch scan for CEREC primescan?

A

2-3 minutes

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20
Q

How long is a full arch scan for CEREC omnicam?

A

8-12 minutes

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21
Q

What do you do with CAD/CAM for a single tooth restoration on natural teeth?

A
  • Crowns
  • Implant restorations
  • Inlays
  • Onlays
  • Veneers
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22
Q

What do you do with CAD/CAM for multi-unit restorations on natural teeth?

A

3-unit bridges

23
Q

What do you do with CAD/CAM for implant restorations?

A
  • Implant planning & surgical guide
  • Custom abutments
  • Cement retained and screw retained crowns
  • Titanium milled bars for full arch restorations
  • Frameworks for implant bridges
  • Full arch monolithic FDP
24
Q

What do you do with CAD/CAM for removable prostheses?

A
  • RPD Frameworks
  • Complete Dentures
25
Q

Why should you use CAD/CAM?

A
  • Faster turn around for fixed restorations
  • Can delegate scanning to Auxillary team members
  • Patients believe high tech is better
  • Possible to have less human error in production process
26
Q

What are the debates involving CAD/CAM?

A
  • Lower costs
  • Better fit of restorations
  • Long term costs of owning digital equipment due to maintenance and replacement costs
27
Q

What are the benefits of digital technology?

A

The multilevel quality improvement afforded through digital technology is recognized in workflow and efficiency, record keeping, and data safety

28
Q

What are the CAD/CAM classifications based on data acquisition?

A
  • Direct
  • Indirect
29
Q

What are the CAD/CAM classifications based on accessibility to STL files?

A
  • Open system
  • Closed system
30
Q

What are the CAD/CAM classifications based on production of final restoration?

A
  • Chair-side Production
  • Laboratory Production
  • Centralized Production
    Centers
31
Q

What is direct data acquisition of CAD/CAM?

A

The data is directly obtained from the patient’s mouth via intra oral scanner

32
Q

What is indirect data acquisition of CAD/CAM?

A

The data is indirectly obtained in the lab either from an impression or a stone cast via bench scanner

33
Q

What is an open file system for CAD/CAM?

A

Are not dependent on the manufacturer, can be used with any software to fabricate the final restoration

34
Q

What is an closed file system for CAD/CAM?

A

The data is controlled and manipulated by the owner (manufacturer)

35
Q

What is chair-side production for final restoration?

A

No provisionalization is needed

36
Q

What is laboratory production for final restoration?

A

dental laboratory scanner and designing software -> CAD/CAM

37
Q

What is the centralized production of final restoration?

A

production center -> CAM

38
Q

_________ scanning is faster and substantially more comfortable

A

Intraoral

39
Q

Digital technologies improve the
workflow from…

A

diagnosis, planning, and treatment

40
Q

What is the analogue cost?

A
  • Initial cost:
    VPS, registration materials ~ $50
  • Additional cost: trays, dispensers, and stone, lab cost, & shipping
41
Q

What is digital cost?

A
  • Initial cost:
  • Scanner $20K -$30K
  • Milling unit $110K - $120K
  • Additional cost: electronic lab prescriptions, blocks, burs, & maintenance, lost time and production if machine goes down
42
Q

What takes time when using analogue methods?

A
  • Tray selection or Custom tray
  • Setting time
  • Remake
  • Opposing arch
  • Inter-occlusal records
  • Disinfection
  • Shipping time
43
Q

What takes time when using digital methods?

A
  • Learning curve
  • Scan (prep, opposing & buccal)
  • Evaluate the scan
  • Rescan
  • Lab prescription
44
Q

Tissue displacement is a MUST for which type of workflow (digital or analogue)?

A

BOTH

45
Q

Dry field is a MUST for which type of workflow (digital or analogue)?

A

BOTH

46
Q

____ mm of uncut tooth structure apical to the finish line is required for both analogue and digital workflow

A

0.5

47
Q

_____________ impressions are still recommended for full-arch restorations

A

Conventional

48
Q

__________ impressions showed a clinically accepted results,& shortened the treatment time

A

Digital

49
Q

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

A

No

50
Q

What are some advantages of the Optical/Digital technique?

A
  • More comfortable to the patient
  • Equal marginal fit (both clinically accepted)
  • Improves dentist/lab communication
  • Cuts down the turn around time
51
Q

What are some advantages of the full-arch impressions?

A
  • Use conventional impression
  • Digital impression are not as accurate across an arch
52
Q

Posterior single tooth restorations fabricated from intraoral scans by using CAD/CAM technology have acceptable results for…

A

shade, contour, marginal adaptation, and occlusion

53
Q

Full-contour, high translucency cubic-containing zirconia is gorwing in use but despite its use it does not have the longevity or fit as ________ nor the strength, longevity, or conservative prep of the ____________

A

e.max
3Y zirconia

54
Q

When prepping a crown reduce an additional ______ mm of the facial and occlusal tooth surfaces compared to the standard prep when using digital?

A

0.20-0.50

Fixed (19 decks)

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