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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
Why should you use CAD/CAM?
- 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
What are the debates involving CAD/CAM?
- Lower costs - Better fit of restorations - Long term costs of owning digital equipment due to maintenance and replacement costs
27
What are the benefits of digital technology?
The multilevel quality improvement afforded through digital technology is recognized in workflow and efficiency, record keeping, and data safety
28
What are the CAD/CAM classifications based on data acquisition?
* Direct * Indirect
29
What are the CAD/CAM classifications based on accessibility to STL files?
* Open system * Closed system
30
What are the CAD/CAM classifications based on production of final restoration?
* Chair-side Production * Laboratory Production * Centralized Production Centers
31
What is direct data acquisition of CAD/CAM?
The data is directly obtained from the patient's mouth via intra oral scanner
32
What is indirect data acquisition of CAD/CAM?
The data is indirectly obtained in the lab either from an impression or a stone cast via bench scanner
33
What is an open file system for CAD/CAM?
Are not dependent on the manufacturer, can be used with any software to fabricate the final restoration
34
What is an closed file system for CAD/CAM?
The data is controlled and manipulated by the owner (manufacturer)
35
What is chair-side production for final restoration?
No provisionalization is needed
36
What is laboratory production for final restoration?
dental laboratory scanner and designing software -> CAD/CAM
37
What is the centralized production of final restoration?
production center -> CAM
38
_________ scanning is faster and substantially more comfortable
Intraoral
39
Digital technologies improve the workflow from...
diagnosis, planning, and treatment
40
What is the analogue cost?
* Initial cost: VPS, registration materials ~ $50 * Additional cost: trays, dispensers, and stone, lab cost, & shipping
41
What is digital cost?
* 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
What takes time when using analogue methods?
* Tray selection or Custom tray * Setting time * Remake * Opposing arch * Inter-occlusal records * Disinfection * Shipping time
43
What takes time when using digital methods?
* Learning curve * Scan (prep, opposing & buccal) * Evaluate the scan * Rescan * Lab prescription
44
Tissue displacement is a MUST for which type of workflow (digital or analogue)?
BOTH
45
Dry field is a MUST for which type of workflow (digital or analogue)?
BOTH
46
____ mm of uncut tooth structure apical to the finish line is required for both analogue and digital workflow
0.5
47
_____________ impressions are still recommended for full-arch restorations
Conventional
48
__________ impressions showed a clinically accepted results,& shortened the treatment time
Digital
49
____ significant difference was observed regarding the marginal gap of single-unit ceramic restorations obtained from digital or conventional impression techniques
No
50
What are some advantages of the Optical/Digital technique?
* More comfortable to the patient * Equal marginal fit (both clinically accepted) * Improves dentist/lab communication * Cuts down the turn around time
51
What are some advantages of the full-arch impressions?
* Use conventional impression * Digital impression are not as accurate across an arch
52
Posterior single tooth restorations fabricated from intraoral scans by using CAD/CAM technology have acceptable results for...
shade, contour, marginal adaptation, and occlusion
53
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 ____________
e.max 3Y zirconia
54
When prepping a crown reduce an additional ______ mm of the facial and occlusal tooth surfaces compared to the standard prep when using digital?
0.20-0.50

Fixed (13 decks)

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