CAD/CAM Chairside Inlay Fabrication Flashcards
(32 cards)
What are the two most important steps in the chairside inlay fabrication process?
- Case Selection
2. Preparation
What is the purpose of using powder to capture images?
the camera requires a uniformly reflective surface to capture the optical images
- light = glare = smearing artifacts
- enamel is too translucent
Generally, new users _____-powder.
under-powder
The Optispray (Sirona product) is a finer particle ____ ______ with a wider spray angle and a _____ color for visibility.
titanium dioxide
blue
(spearmint scent/taste)
Inadequate powder results in _____ and _____.
rough surface and model distortion
True or False: Powder should be applied to the entire prep and adjacent teeth.
True
True or False: Retraction cord should be kept in place during the entire procedure, including bonding.
True, removal = bleeding (even though you soak it in hemostatic solution)
True or False: You can use a laser to trough gingiva in areas where you need better visibility.
True
What is the “Standard” or “Basic” Mode?
- designs restorations for posterior only
- allows for minimal adjustments to the proposed design
What is the “Master” Mode?
- can be used for restorations in all quads
- allows for major adjustments to the proposed design
To avoid a depth-dependent scale resulting from beam divergence, a ______ lens has been introduced into the optical path.
Collimating
parallel beams are less reflective and more accurate
When holding the camera, use a ____ grasp with a ______ for maximum control.
pen grasp
finger rest
The _______ (up/down motion) is controlled by using a solid rest (camera stabilizer piece) on an adjacent tooth.
pitch
The ____ and ____ (horizontal motions) are determined by the path of insertion.
yaw and roll
The maximum distance between the lens and structures should be _______ in order to get accurate focus.
14 mm (cerec 3d)
21 mm for cerec AC
On the adjacent tooth, where should the camera stabilizer be placed?
marginal ridge and central fossa
True or False: When a powder spot occurs on the lens, do not take eyes off the working field.
True, hold the camera up to your assistant so they can wipe with a damp 2x2 with alcohol
Describe the process for taking an image by using the foot pedal.
“Search Mode”: initiated by holding foot pedal
Capture: release of foot pedal
Acceptance: ONE tap of the pedal
Delete: TWO taps of the pedal
Why is bite registration used during the imaging process?
makes the antagonist model
The first of three images will give you the preparation itself and the ______.
path of insertion***
The Second and third images are of the ____.
adjacent teeth
Images need to maintain the same angulation and have a ______ overlap.
8mm
If there is more than one box preparation in the outline form, the recommended taper is ____ for each.
15 degrees
What is the “distal shadow concept?”
- the infrared beam travels at a 10 degree angle and cannot capture undercuts
- the missing areas are extrapolated to complete the construction
- extrapolated areas appear slightly darker on models
- the software builds a false contour
