Diagnostic Casts and Mounting * Flashcards
1
Q
Trays used for primary impressions:
A
Rim-lock and Stock Trays
2
Q
Amount of space that should surround arch with tray:
A
6mm
3
Q
Which impression trays require alginate adhesive?
A
Stock Trays
4
Q
How many scoops of alginate for 1 arch?
A
1
5
Q
Maxillary details that should be visible in impression:
A
Frenum, full roll, palate, rugae, hamuler notch
6
Q
Mandibular details that should be visible in impression:
A
Frenum (labial), full roll, retromolar pad
7
Q
Name of Bite Registration we are using:
A
Virtual Bite Registration (orange label) 3 sections (not touching), 1 per sextant (trim with scalpel blade)
8
Q
Type of stone used for diagnostic casts:
A
microstone, type III dental stone
9
Q
Expansion of microstone:
A
about 0.12%
10
Q
Amount of stone to water with microstone:
A
140 mg to 40mL
11
Q
How wide should the land area be for diagnostic casts?
A
1-2 mm, dense smooth surface with no positive nodules/ no voids
12
Q
Thickness of posterior part of diagnostic cast:
A
10-15mm
13
Q
Why is the width of the posterior portion of the diagnostic cast different than that in the manual?
A
mounting plates
14
Q
What are we using in place of our facebow?
A
mounting jig
15
Q
What do we use to make 3 divits in our diagnostic cast?
A
stone cutter or arbor band
16
Q
Into what machine are the stone cutter and arbor band attached?
A
lathe
17
Q
Angle of Hannau Articulator:
A
30 degrees
18
Q
Expansion of mounting stone:
A
0.08%
19
Q
Amount of stone to water for microstone(?) (mounting?):
A
100g to 26mL water
20
Q
Mounting maxillary cast:
A
Make X on top, small glob on either side, let dry, use second batch for the rest, hot glue man to maxillary upside down using the bite registration
21
Q
Are the extra impressions we keep for the patient records supposed to be mounted with stone as well?
A
Yes
22
Q
Name of the scanner we are using:
A
Planmeca/ E4D
23
Q
If you have to disconnect the white thunderbolt:
A
disconnect the red-white connector (scanner), exit software, click eject media icon in the lower right corner of desktop, choose “Eject IEEE I394 Controller”
24
Q
What should you do if the scanner is not being used for a long time?
A
disconnect the scanner (otherwise, fan will continue running)
25
What do you do with the cord after the connector is disconnected from the thuderbolt?
untwist the cord and wrap it around the cradle holder
26
After clicking "add patient" what do you fill in for the fields "person id", "first name" and "second name?"
person id: Project Name-Typodont Number (i.e. CCC30A-965), first name: TRM, Last name: 965, save patient, click CADCAM button, click scan, click prep, space bar to start scan, "Go to CADCAM" ,double click new scan?
27
The tip of the scanner is ALWAYS place toward:
the distal of the arch
28
Start scanning here:
occlusal of prep, long part of the head touching the occlusal surface
29
Scanning pattern:
Occlusal of preparation, head on occlusal surface with long part of head touching occlusal surface, then mesial, tilt head toward lingual, scan all 3, occlusal of tooth distal to preparation, rotate tip toward the buccal and continue scanning form distal to mesial (all 3 teeth), scan the lingual proximal surface using fish tail movements
30
What do you do after scanning the 3 teeth?
Go to home page by clicking on upper left tooth icon, file, export, export CADCAM case, allow it to be saved, highlight the file, save to desktop (saves as zipped with date and time), click export, create a folder on the desktop "965 - Project number (CCC 30)," open folder, find "prep" folder and copy the content of "prep" folder into the created folder, find folder for typodont 965 under shared folder move "Digital 2019" and move the created folder under your folder, delete unzipped from desktop, open Compare
31
True or False? Compare software can read zipped files.
F
32
After opening Compare:
Load Master: CCC 30- Standard Preparation, Load Sample: Your Scan
33
Which portion of the preparation does the tip of the Chamfer Bur - Compare Software create?
the margin - tip
34
Which portion of the preparation does the side of the Chamfer Bur - Compare Software create?
axial wall base - side
35
Margin in Compare Software:
Finishline in dentistry
36
Axial Wall Base in compare Software:
the most gingival portion of the axial wall and the most internal portion of the finishline
37
occlusal in compare software:
outline of functional cusp bevel and occlusal table
38
Set occlusal angle:
position direction of yellow cylinder in order to have proper path of insertion
39
What do you take to the scanning room? (B28K?)
cleaned prepared tooth, screw, and screw driver
40
Clock posiitons for R handed clinician:
12-8
41
Patient position, mandibular arch:
mandibular occlusal surface 45 degrees to floor
42
Position of patient while working in maxillary arch:
maxillary occlusal surface perpendicular to the floor
43
Position of clinician for mandibular anterior sextant:
8-9 o'clock
44
Position of clinician for maxillary anterior sextant:
12 o'clock
45
Position of clinician for mandibular right posterior buccal and mandibular left posterior lingual:
9 o'clock
46
Position of clinician for maxillary right posterior buccal and maxillary left posterior lingual:
9 o'clock
47
Position of clinician for mandibular left posterior buccal and mandibular right posterior lingual:
10 -11 o'clock
48
Position of clinician for maxillary left posterior buccal and maxillary right posterior lingual:
10-11 o'clock
49
Position of clinician for occlusal of maxillary posterior:
12 o'clock
50
Position of clinician for occlusal of mandibular posterior:
8-9 o'clock
51
Position of clinician for anterior surface toward my non dominant hand:
8-9 o'clock
52
Position of clinician for anterior surface away from my non dominant hand:
12 o'clock
53
Position of clinician for posterior aspects facing toward me (right facial and left lingual)
9 o'clock
54
Position of clinician for posterior aspects facing away from me (right lingual and left facial):
10-11 o'clock
55
When working in these areas the patients head should be slightly toward with chin down:
Any mandibular anterior AND mandibular posterior, away from me (right lingual and left facial)
56
When working in these areas the patients head should be slightly toward with chin up:
Any maxillary anterior surface AND maxillary posterior, away from me (right lingual and left facial)
57
When working in these areas the patients head should be slightly away with chin down:
Mandibular, posterior, toward me (right facial and left lingual)
58
When working in these areas the patients head should be slightly away with chin up:
maxillary, posterior, toward me (right facial an left lingual)
59
Musculoskeletal injury =
force, repetition, position, no rest
60
What causes carpal tunnel syndrome?
compression of the median nerve in tunnel: poor posture, bending the hand repeatedly in any direction and continuously pinch-gripping an instrument without resting muscles
61
8 musculoskeletal disorders seen in dental healthcare providers:
carpal tunnel, ulnar nerve entrapment, pronator syndrome, tendinitis, tenosynovitis, extensor wad strain, thoracic outlet syndrome, rotator cuff tendinitis
62
What causes ulnar nerve entrapment?
compression of the ulnar nerve as it passes through the wrist: bending of the hand in any direction and holding the little finger full span away from the hand
63
What causes pronator syndrome?
compress median nerve between heads of pronator teres: holding the lower arm away from the body
64
What other syndrome has symptoms similar to carpal tunnel?
Pronator syndrome, both involve median nerve
65
What causes tendinitis?
strain: repeatedly extending the hand up or down at the wrist (pain at outer edges of hand, not center of wrist)
66
What causes tenosynovitis?
inflammation of the tendons on the side of the wrist and at the base of the thumb: hand twisting, forceful gripping, bending the hand back or to the side
67
What causes extensor wad strain?
extensor muscles of thumb and fingers: extending fingers independently of each other
68
What causes thoracic outlet syndrome?
compress brachial plexus and assoc vessels: titling the head forward, hunching the shoulders forward, and continuously reaching overhead
69
What causes rotator cuff syndrome:
elbows above waist and upper arm away from body
70
Neutral seated position:
forearms and thighs parallel to the floor, weight evenly balanced, hip angle 90 degrees, heels of feet on floor
71
Neutral neck position:
Head tilt 0-15 degrees, line form eyes to treatment area as near to vertical as possible (?)
72
neutral back position:
slightly forward, 0 - 20 degrees
73
neutral shoulder position:
horizontal line, weight evenly balanced when seated
74
Neutral arm position:
upper arms parallel total long axis of torso, elbows at waist level held slightly away from body (within 20 degrees of body)
75
Neutral forearm position:
parallel to floor, raised or lowered, if necessary, by pivoting at the elbow joint from 60-100 degrees
76
Neutral hand position:
Little finger-side of palm slightly lower than thumb side of palm, wrist aligned with forearm
77
Supine position:
patient horizontal, chair back nearly parallel with floor, heels just above tip of nose (blood flow, less likely to faint), chair can be slightly up for mandibular work, top of head even with upper edge of head, adjust head rest so patients neck and head are aligned with the torso
78
True or False? Patients should tilt their head up when working in the mandibular areas.
F. down
79
True or False? The chin-up position is when the head is in a neutral position.
T. used for maxillary work
80
Define ergonomics:
adjusting the design of tools, equipment, tasks, and environments for safe, comfortable, and effective human use
81
Why should you limit the time spent in the 8 o'clock position?
difficult to maintain neutral arm position
82
Forearm position in 9 o'clock position:
alignment with patients shoulder (approximate)
83
Your left hand and wrist should be here in the 9 o'clock position:
over patients right eye
84
Position of right and left hands in the 10-11 o'clock position:
left hand and wrist above the patients nose and forehead, right directly across the corner of the patients mouth
85
Position of wrists and hands in the 12 o'clock position:
above patients ears and cheeks
86
Anterior surfaces toward my non-dominant hand are:
mesial surfaces to left of midline and distal to right of midline
87
Posterior aspects facing toward me:
right facial, left lingual
88
Posterior aspects facing away from me:
right lingual, left facial
89
Patient positioning mnemonic:
Me, Patient, Light, Nondominant, Dominant
90
True or False? The anterior surface are away from my non dominant hand when positioned to work in the anterior sextant.
F. toward my non dominant hand
91
Chin position of patient when working in the 8 to 9 o'clock position on the mandibular teeth:
toward, chin down
92
Chin position of patient when working in the 8 to 9 o'clock position on the maxillary teeth:
toward, chin up
93
When working in the 12 o'clock position the chin should be down for this arch and up for this arch:
mandibular, maxillary
94
Should you ask the patient to turn toward or away from you when working on the mandibular posterior right buccal surfaces? chin up or down?
away, chin down
95
Should you ask the patient to turn toward or away from you when working on the mandibular posterior left lingual surfaces? chin up or down?
away, chin down
96
Should you ask the patient to turn toward or away from you when working on the maxillary posterior right buccal surfaces? chin up or down?
away, chin up
97
Should you ask the patient to turn toward or away from you when working on the maxillary posterior left lingual surfaces? chin up or down?
away, chin up
98
Should you ask the patient to turn toward or away from you when working on the mandibular posterior left buccal surfaces? chin up or down?
toward, chin down
99
Should you ask the patient to turn toward or away from you when working on the mandibular posterior right lingual surfaces? chin up or down?
toward, chin down
100
Should you ask the patient to turn toward or away from you when working on the maxillary posterior left buccal surfaces? chin up or down?
toward, chin up
101
Should you ask the patient to turn toward or away from you when working on the maxillary posterior right lingual surfaces? chin up or down?
toward, chin up
102
type of material we use for interocclusal record:
PVS (polyvinyl siloxane) registration material. Apply virtual registration
103
How to trim the interocclusal registration:
just leave the tips of cusps, thin orange piece
104
Type of stone for the maxillary arch:
cast stone (microstore), vibrate to remove bubbles
105
Bottom part of the cast should be:
parallel to the occlusal surface
106
What needs to be done to the cast before mounting?
Pindex the bottom ( 3: CI's and one at either corner)
107
Articulator condylar angulation should be set at:
30 degrees
108
Angulation of anterior table:
zero angulation
109
Why do we wet the maxillary cast after scratching it?
ask
110
Type of stone to mount cast to articulator:
plaster stone (mounting)
111
Always scan under:
prep
112
What color should you see on the occlusal surface to continue scanning:
green/ yellow
113
What will happen if you scan too quickly with Scan /ED4?
won't scan, L and R image won't move together on screen
114
Always go to the buccal/ lingual first when scanning:
lingual
115
True or False? Hydrocholoid material requires a larger tray than PVS material when taking impressions.
T
116
Why do we NEED to trim our interocclusal record?
proper interdigitation
117
The cast must be __ before the sticky wax or hot glue will stick.
Dry
118
When maxillary and mandibular casts can be switched and properly interdigitated together:
Crossmounting
119
What will happen if you soak a cast in plain water and not slurry water?
leach out, lose stone from cast
120
Pour up a cast within:
15 minutes
