BASIC TECHNIQUES Scanning, and Designing

Question 1

Traditional Workflow Disadvantages:
(6)

Answer 1

• Mold instability;
• Mold transport and packaging;
• Plaster pouring and solidification;
• Lacerations on margins;
• Contact between the tray and the teeth;
• Geometrical and dimensional
  inconsistencies between the plaster model
  and the real teeth.

Question 2

Digital Workflow Advantages:
(5)

Answer 2

• Implementation of highly accurate models;
• Traditional workflow simplification;
• Possibility to create and periodically update a
  database;
• Dentitions for future interventions;
• Possibility to simulate surgery interventions
  on the digital model.

Question 3

skipped
Intra-oral Scanning Devices In The Market

Answer 3

• CEREC – Dentsply-Sirona (Germany)
• iTero – Cadent (Israel)
• E4D – D4D Technologies (USA)
• Lava C.O.S. – 3M ESPE (USA)
• IOS Fast Scan – IOS Technologies
  (USA)
• MIA3D – Densys3D (Israel)
• DPI3D – Dimensional Photonics (USA)
• 3D Progress – MHT S.P.A. (Italy)
• Direct Scan – HINT–ELS (Germany)
• Trios – 3Shape (Denmark)
• Blue scans – I.A Tron3Ds (Austria)
• Plan scan – Planmeca (Finland)
• Condor – Remedent (Belgium)
• CS 3500 – Carestream Health (USA)
• …
  I

Question 4

skipped
Intraoral Scanner Patents
(5)

Answer 4

q Triangulation Techniques
q Active Wave Front Sampling
q Confocal Laser Scanner Microscopy
q Optical Coherent Tomography
q Accordion Fringe Interferometry

Question 5

Basic Requirements for Intraoral Scan
(3)

Answer 5

• Proper retract the lips and cheek;
• Dry and clean teeth;
• Machine position.

Question 6

Intraoral Scan Methods
Triangulation/Active Wave Techniques
(CEREC Omnicam/Primescan, 3Shape Trios)
(2)

Answer 6

q Intraoral Regional Scan
q Intraoral Full Arch Scan

Question 7

. Maxillary Arch Regional Scan
(4)

Answer 7

1 Palatial cusp
2 Palatial surface
3 Buccal cusp
4 Buccal surface

Question 8

I. Mandibular Arch Regional Scan
(4)

Answer 8

Buccal cusp
2 Buccal surface
3 Lingual cusp
4 Lingual surface

Question 9

II. Intraoral Full Arch Scan
* Scan Sequence: (e.g. Maxillary arch)
(8)

Answer 9

• Lingual (Terminal teeth to over midline);
• Occlusal;
• Buccal;
• Corner (Canine area);
• Same sequence for left side;
• Palatal (Optional);
• Bite (Left and right premolar area);
• Final check.

Question 10

II. Maxillary Full Arch Scan
(8)

Answer 10

1 Palatial
2 Occlusal
3 Buccal
4
4 Corner 5
5 Connect Buccal 6
7 6 Connect Occlusal
7 Connect Palatial
8
8 Corner

Question 11

II. Mandibular Full Arch Scan
(8)

Answer 11

1 Buccal
2 Occlusal
3 Lingual
4 Corner
5 Connect Buccal
6 Connect Occlusal
7 Connect Palatial
8 Corner

Question 12

II. Full Arch Bite Scan
(3)

Answer 12

1 Premolar
2 Maxi. anterior
3 Premolar

Question 13

steps
(3)

Answer 13

1. scan the working jaw
2. scan the opposing jaw
3. scan the bite

Question 14

the blank area indicates the

Answer 14

image is missing

Question 15

refining steps (5)

Answer 15

1. refine the position
2. refine the shape
3. refine the details
4. adjust the contacts (occlusal)
5. adjust the contacts (movement)

Question 16

design for no glazing:
design for glazing:

Answer 16

slight red dot
no red