BASIC TECHNIQUES MILLING, AND PRINTING

Question 1

CAD:
CAM:

Answer 1

Computer Aided Designing
Computer Aided Manufacturing

Question 2

DENTAL MILLING MACHINE
CLINIC RELATED FACTORS
(3)

Answer 2

q Milling Axis
q Dry and Wet Milling
q Functional Movement of Bur

Question 3

I. MILLING AXIS
* DENTAL MILLING MACHINES CAN MILL VARIETY OF RESTORATION TYPES AND MATERIALS.
* MOST CHAIRSIDE MILLING MACHINES ARE —
* MOST LABORATORY MILLING MACHINES ARE —

Answer 3

4-AXIS MILL
5 OR MORE AXIS MILL

Question 4

I. MILLING AXIS
* FOUR AXIS MILLING MACHINE
* THE MILLING BUR MOVES IN THE

Answer 4

3 AXES, X, Y, AND Z, AND THE MATERIAL BLOCK CAN
ROTATE IN 1 ADDITIONAL AXIS (ALSO TERMED 3 + 1 AXIS MILLING MACHINE)

Question 5

I. MILLING AXIS
* FOUR AXIS MILLING MACHINE
* THE ADDITION OF A FOURTH AXIS (A AXIS) ALLOWS THE

Answer 5

BLOCK TO BE
AUTOMATICALLY FLIPPED OVER, SO THE MACHINE CAN REMOVE MATERIAL
FROM BOTH SIDES.

Question 6

I. MILLING AXIS
* FIVE AXIS MILLING MACHINE
* MILLING MACHINES WITH – OR MORE AXES CAN ROTATE THE MATERIAL BLOCK
IN ADDITIONAL AXES
* MILLING OF MORE COMPLEX DESIGNS – …

Answer 6

5
UNDERCUTS IN IMPLANT
SUPERSTRUCTURE

Question 7

I. MILLING AXIS
* FIVE AXIS MILLING MACHINE
* 5 AXIS CNC MACHINES CAN SELECT

Answer 7

TWO OF THE THREE ROTATIONAL
AXES (A,B,C) TO USE. THE A, B, AND C AXES PERFORM A 180° ROTATION
AROUND THE X, Y, AND Z AXES, CORRESPONDINGLY.

Question 8

FOUR AXIS MILL
* SPEED
* BLOCK SIZE
* UNDERCUT
* USAGE

Answer 8

FASTER IN SINGLE PRODUCT
MAX 80 X 16 MM
DISABLE
CROWN AND SHORT FPD

Question 9

FIVE AXIS MILL
* SPEED
* BLOCK SIZE
* UNDERCUT
* USAGE

Answer 9

FASTER IN MULTIPLE PRODUCT
∅ 98.5 X 30MM
LIMITED
LONG FPD AND DENTURE

Question 10

*(2) is not relevant with the axis

Answer 10

accuracy and resolution

Question 11

II. DRY AND WET MILLING
* IN GENERAL, THE TYPE OF MATERIAL BEING MILLED DETERMINES WHETHER A MILL
SHOULD BE DRY OR WET.
* WET MILLING:
* DRY MILLING:
* BOTH DRY AND WET:

Answer 11

LITHIUM DISILICATE, FELDSPATHIC PORCELAINS, AND CHROME
COBALT METALS
WAX, SOME ACRYLIC, AND RESIN
ZIRCONIA, TITANIUM, AND SOME ACRYLIC

Question 12

II. DRY AND WET MILLING
* THE LIQUID IN A WET MILL SERVES SEVERAL FUNCTIONS:
(3)

Answer 12

• KEEPING BOTH THE TOOL AND MATERIAL COOL
• HELPS TO REMOVE MATERIAL FROM THE MILLING DISK OR BLOCK CERTAIN
  (CLEAN FILTER)
• ADDITIVES CAN ALSO BE INCLUDED IN THE LIQUID TO ACT AS A CUTTING
  LUBRICANT (CLEAN WATER TANK)

Question 13

II. DRY AND WET MILLING
* DRY MILLING DOES NOT USE LIQUID TO REMOVE SCRAP MATERIAL AWAY FROM THE
CUTTING SURFACE, BUT RATHER (2), OR A COMBINATION OF
BOTH.
* MAINTENANCE CLEANING IS STILL REQUIRED, AS A CONSIDERABLE AMOUNT OF
(2) ARE GENERATED WITH DRY MILLING.
* VACUUM SIZE, NOISE, AND OPERATING EXPENSE SHOULD ALL BE CONSIDERED
BEFORE MAKING A PURCHASE.

Answer 13

PRESSURIZED AIR, VACUUM
DUST AND SHAVINGS

Question 14

III. FUNCTIONAL MOVEMENT OF BUR
* BUR MOVEMENT AT MILLING IS THE REVERSE OF ..
* A SUCCESSFUL TEETH PREPARATION SHOULD ..

Answer 14

TEETH PREPARATION.
FOLLOW THE MILLING PROCESS AND BUR
DIMENSION

Question 15

A SUCCESSFUL TEETH PREPARATION SHOULD
FOLLOW THE …

Answer 15

MILLING PROCESS AND BUR
DIMENSION

Question 16

III. FUNCTIONAL MOVEMENT OF BUR
1. MARGIN AT LEAST – WIDTH IN
DIMENSION OF THE BUR TIP’S SIZE.
2. CUSP AND FOSSA AT LEAST THE
— DIMENSION OF THE BUR TIP’S
SIZE.
3. PREPARED TEETH — AT
MOST THE BUR’S LENGTH.

Answer 16

½
SAME
HEIGHT

Question 17

4. MARGIN THICKNESS IS DEPENDS
   ON BOTH THE (2)
5. TAPERING ANGLE DEPEND ON
   …

Answer 17

BUR SIZE AND CROWN
MATERIAL.
THE BUR DESIGN (DISCUSS LATER)

Question 18

CYLINDER POINTED BUR 12 S (— BUR)

Answer 18

OCCLUSION

Question 19

I. CEREC MCX/MCXL
STEP BUR 12 S
CYLINDER POINTED BUR 12 S
Usage:
(3)

Answer 19

Crown / Onlay / Inlay
(E-max, Enamic, Certra Duo, Vita Mark II)

Question 20

I. CEREC MCX/MCXL
STEP BUR 20
CYLINDER POINTED BUR 20 S
Usage:
(1)

Answer 20

Implant (Temp) Crown
(E-max, Telio Temp)

Question 21

SHAPER 25 RZ (— BUR)

Answer 21

WILD CUTTING

Question 22

FINISHER 10 (— BUR)

Answer 22

BRITTLE CUTTING

Question 23

I. CEREC MCX/MCXL
SHAPER 25 RZ
FINISHER 10

Usage:
(4)

Answer 23

CEREC Surgical Guide / Temp Crown / Zirconia Crown / FPD
(CEREC Guide Bloc, Zirconia, Telio Temp)

Question 24

TH E HEIG HT O F PREPA RA TIO N ;
This distance
should not
exceed —

Answer 24

12 mm

Question 25

2. THE WIDTH OF PREPARATION;
   This width should
   not be less than
   —

Answer 25

1.0 mm
(0.8 -1.25 mm)

Question 26

3. TALL VERTICAL WALLS;

Answer 26

5 mm
Step bur 12 S
3 º

Question 27

4. TIGHT CORNERS;
   RECOMMENDATION:

Answer 27

ENSURE CORNERS OF THE INTERNAL SURFACE
MARGIN HAVE GREATER THAN 1.0 MM
DIAMETER.

Question 28

5. “HOLY” ZONE (OVER MILL);
   RECOMMENDATION:

Answer 28

ENSURE PREPARATION SHOULDERS AND
CUSPS ARE AT LEAST 1.0 MM IN
DIAMETER.

Question 29

6. MARGIN DESIGN;
   RECOMMENDATION:

Answer 29

FINISH ALL MARGINS WITH A FINE OR
SUPERFINE DIAMOND. SO THAT ALL SMALL
DEFECTS, “BUR CHATTER” ETC., ARE REMOVED.

Question 30

7. MIN IM UM THIC KN ESS
   — for isthmus
   — internal line angles

Answer 30

1.5-2 mm
rounded

Question 31

8. UNDERCUTS.
   Undercut
   detected but will
   not mill:
   Undercut not
   detected:

Answer 31

Open
margin
Not
seat

Question 32

8. UNDERCUTS.
   Recommendation:

Answer 32

If undercuts cannot be
avoided during
preparation of the tooth,
avoid capturing undercuts
during the Optical
Impression stage. The
user may also rectify
situations like the one
shown here (right) by
changing the path of
insertion (“Design” >
“Insertion axis…”)

Question 33

PREPARATION REQUIREMENTS
(5)

Answer 33

• SUFFIC IEN T TOOTH RED UC TIO N (ADEQUATE STRENGTH O F
  MATERIALS);
• ROUNDED IN TERN A L ANGLES (PA SSIVE SEA TIN G , PREVENTS
  FRACTURES);
• SM OOTH TAPERED W ALLS (GOOD IN TERN A L A D A PTA TIO N );
• CRISP W ELL -D EFIN ED M A RG IN S A ID IN M A RG IN D ETEC TIO N ;
• EXIT ANGLES AND M A RG IN S A PPRO A C HIN G 90 ̊ENSURES BULK O F
  CERAMIC AT MARGIN FOR STRENGTH

Question 34

In case of equigingival or subgingival margins, — is necessary

Answer 34

gingival
retraction

Question 35

Check if there is (2) for the area that
you’re going to scan.

Answer 35

bleeding or swelling

Question 36

3D PRINTING
DEFINITION

Answer 36

• 3D PRINTING OR ADDITIVE MANUFACTURING
  TECHNOLOGIES CREATE THREE-DIMENSIONAL
  PARTS FROM COMPUTER-AIDED DESIGN MODELS
  BY SUCCESSIVELY ADDING MATERIAL LAYER BY
  LAYER UNTIL PHYSICAL PART IS CREATED.

Question 37

3D PRINTING TECHNOLOGIES
(3)

Answer 37

q Deposition Methods
q Polymerization Methods
q Sintering Methods

Question 38

skipped
3D PRINTING MATERIALS
AVAILABLE IN DENTAL CLINIC
(7)

Answer 38

q DENTAL MODEL RESIN
q DENTAL PROTOTYPE RESIN
q DENTAL SURGICAL GUIDE RESIN
q DENTAL NIGHT GUARD RESIN
q DENTAL CASTABLE WAX RESIN
q DENTURES BASE/TEETH RESIN
q DENTURE METAL
(COBALT-CHROMIUM (CO-CR) ALLOYS)