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Summer Lab Flashcards

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1
Q

What burs are mainly used in peds?

A

330 and 169L.

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2
Q

How many teeth do you isolate for a class I?

A

Only 1 tooth.

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3
Q

How many teeth do you isolate for a class II?

A

The adjacent teeth.

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4
Q

Do we do MODs?

A

NO!

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5
Q

How far below the gingival margin should a SSC be seated?

A

1 mm.

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6
Q

Size in Primary vs. Permanent

A

Primary is smaller in all dimensions, except for the primary molars which are larger than the succeeding premolars.

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7
Q

What is the one exception to the size comparisons of primary and permanent teeth?

A

Primary molars are larger than the succeeding premolars.

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8
Q

Compare the form of primary and permanent anatomic crowns.

A

Primary anatomic crows are shorter and wider and have a greater constriction at the CEJ.

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9
Q

Compare the form of primary and permanent molars.

A

Primary molars are narrower occlusally compared to the compared to the cervial dimension. Wider at the gingiva.

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10
Q

Compare the primary and permanent canines and molars

A

Primary have more prominent cervical contour.

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11
Q

Compare the enamel and dentin of primary and permanent teeth.

A

In primary, much thinner. Primary enamel rods in the gingival third run occlusal from the DEJ while in the permanent teeth, the rods run in a cervical direction.

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12
Q

Compare the pulp of primary and permanent teeth.

A

Primary teeth have larger pulp cavities relative to crown size. Primary molar pulp chamber outline follows the occlusal crown surface with horns under each cusp.

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13
Q

Which pulp horn in the primary molars is closest to the surface?

A

MESIAL pulp horns are closer to the distal horns. MB horn is the most prominent.

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14
Q

Compare the roots of primary and permanent teeth.

A

Primary roots are more divergent.

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15
Q

When is root development completed and when does resorption begin?

A

Root development is completed 1 year after eruption and resorption begins 1-2 years before exfoliation.

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16
Q

What are the proximal contacts like on primary dentition?

A

Broad and flat.

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17
Q

Compare enamel color of primary and permanent teeth?

A

Primary teeth are whiter.

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18
Q

Compare enamel hardness of primary and permanent teeth.

A

Primary undergoes greater attrition.

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19
Q

Do we use hand instruments in peds?

A

NO!

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20
Q

What is the isolation technique for primary incisors?

A

Small holes or slit technique or ligation with a slip knot placed under the cingulum.

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21
Q

What should the isthmus be for a class 1?

A

Shouldn’t be more than 1/3 of the intercuspal distance?

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22
Q

What teeth have transverse ridges and how do you handle the restorations on those teeth?

A

DO NOT CROSS THE TRANSVERSE RIDGE! Present on A and J, the MX 2nd molars, and L and S, the MN 1st molars. It is a ridge running from the DB to the ML cusp.

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23
Q

Which teeth differ the most in morphology compared to their successor teeth?

A

MN primary 1st molars! Remember, these are the guys with the transverse ridge.

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24
Q

Which teeth do you need to be careful to not prep the wrong tooth?

A

ALL OF THEM. But, MN and MX 2nd primary molars are very similar to the adjacent first molar.

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25
Which primary tooth differs the most in morphology from person to person?
MX 1st molars (B and I)
26
Which primary tooth most closely resembles premolars?
MX 1st molars.
27
Internal outline form of a class 1 prep.
Walls should be parallel to long axis of tooth, with straight convergence towards the occlusal.
28
How do you adapt your internal outline form if the caries takes you close to the marginal ridge?
Prep that wall divergent.
29
How far into dentin should the pulpal floor be?
0.5 mm into dentin. Slightly rounded via the 330 bur.
30
Describe the Buccal Pit preparation for primary molars
Tear drop shape with base towards the cervical. Preparation is centered in the defect and extended towards the DEJ to include caries and unsupported enamel.
31
Describe the buccal groove or "finger" extension.
Occlusal portion of the prep extends onto the buccal to a groove free location. Axial wall is parallel with the buccal surface of the tooth. Width is 1mm No retentive grooves, and rounded lines and angles.
32
Primary Class 1 for MX second primary molars.
Looks like the permanent teeth, so be careful. Hourglass shape. DON'T cross the transverse ridge. Prep the OL groove if decay is present. BUT DON'T violate the transverse ridge or marginal ridge. Just go from the distal pit to the lingual surface.
33
What are the dimensions for a class 5?
Should include all caries but extend no further than necessary to incorporate carious tooth structure. Rounded (convex) axial wall and all internal line angles. Floor just into the dentin at 0.75 mm from the facial.
34
What is the best restoration for lesions extending beyond the proximal line angles or involvement of more than 1 proximal surface?
SCC!!!! We don't do MODs
35
Are slot preps used?
No! Inadequate retention.
36
Describe the Reverse S in a Class 2.
Proximal walls are extended to meet the external proximal surface at 90 degree angle. (occlusal buccal wall)
37
The _______ _ _ ___________ should be able to pass through the proximal outline and the adjacent tooth.
Tip of an Explorer
38
What motion do you use to develop the "box" of the class 2 primary restorations?
Pendulum motion.
39
How deep should the gingival floor of the box be?
Deep enough to break contact, but not too deep because you can hit the pulp. Twice as deep as the pulpal floor.
40
What should the width of the gingival floor be?
1 mm, or just into dentin and wide enough for a condenser.
41
What is the Matrix system for class 2 primary restorations?
T Band
42
Who invented the SSC?
Dr. William Humphrey.
43
What is the indication for a SSC?
Substantial loss of tooth structure, lesions involving 3+ surfaces, lesions with extensions beyond line angles, pulpal proximity, primary first molars with mesial proximal involvement, pulpotomy treatment, enamel hypoplasia, trauma, and permanent posterior teeth requiring full coverage.
44
Where does retention come from?
Primarily from close marginal adaption to subgingival margins, slightly larger than the SSC.
45
Why is seating over a larger surface possible for a SSC?
Flexibility of the strain hardened meteal.
46
How many sizes are available for SSC?
6 sizes for primary molar crowns, 6 sizes for permanent molar and 6 sizes for permanent premolar.
47
What two dimensions are considered in size selection of a SSC?
MD of the unprepped tooth, then circumference.
48
What is the most common size of SSC?
#4
49
The SSC should exhibit _______ pressure at the _______ ______.
Frictional pressure, gingival margin.
50
Should you reduce the buccal and lingual surfaces for a SSC?
No! Maintain the cervical dimension/height of contour for retention.
51
What should you do if a tooth is in between sizes?
Trim some from the cervical of the crown to increase the diameter.
52
What direction do you seat the SSC?
Lingual to buccal. Less to more bulging surface.
53
What direction do you remove an SSC?
The opposite way of seating. Buccal to lingual.
54
What instrument do you use to remove a SSC?
Cleoid Discoid. Never an explorer. Always keep finger pressure on it and if no rubber dam is being used, a pharyngeal screen.
55
What is the occlusal reduction for an SSC and what bur do you use?
1-1.5, use a tapered diamond or 169L bur.
56
What should the occlusal-buccal/lingual lie angles be?
Bevelled at a 35-45 degree angle to the occlusal table. No sharp cusps.
57
What is the proximal reduction for an SSC?
0.5-1 mm using the 169 L bur.
58
What should you thing of the outline of a SSC prep?
Semi circular outline that doesn't extend to the proximal line angles and encompasses the HOC.
59
What type of margin should the interproximals have?
Feathered. NO LEDGES. Should be a straight slice. Not curved.
60
In a SSC prep, what bur should you use to remove caries?
330. Also used to get remnants of previous restorations.
61
What level should the marginal ridges be at for a SSC?
Level with adjacent teeth.
62
How do you confirm proper length and fit of a SSC on a permanent molar?
BW prior to cementation. REQUIRED for permanent molars.
63
What do you use to trip a SSC?
Crown and bridge scissors or a heatless stone. Smooth confluent curves for the margins.
64
What does tissue blanching signify?
The SSC may need to be re-contoured.
65
Describe the margin of a seated SSC.
No gap. Smooth and continuous flow with resistance.
66
Why is crimping done, and where?
Help achieve a better marginal fit. Done on the buccal and lingual gingival margins, 1 mm from the edge. Reduces the overall circumference.
67
Do you use a rubber dam to cement a SSC?
Can be done with both.
68
What type of cement do you use for a SSC?
Commonly, glass ionomer.
69
How is complete seating confirmed?
Marginal ridges being level with adjacent teeth.
70
How do you check occlusion for an SSC?
Ipsilateral and contralateral.
71
What order do you prep and seat SSCs if you are doing multiple teeth?
Complete each tooth's occlusal reduction before progressing to the next tooth, so you can maintain a reference point. Fit and place the crowns in the same order that you prepped the teeth, usually distal to mesial.
72
What should the proximal reduction be for adjacent teeth that are both being prepped for a SSC?
At least 1.5 mm of space at the gingival level to provide adequate space for the placement of both crowns.
73
What are the options for Anterior crowns?
SCC, open faced SCC, pre veneered SSC or full resin crown.
74
What type of anterior crowns are preferred?
SCC and open faced SCC, because they have the best longevity, durability and esthetics.
75
What is a disadvantage of an open faced SSC?
Increased placement time due to the two stepped procedure.
76
When do you select the composite shade for an open faced SSC?
BEFORE beginning the procedure.
77
What size SSC is used for MN centrals and laterals?
Smaller sizes of the MX laterals, reversing the designated side.
78
What is proper sized of SSC for anterior teeth based upon?
MD dimension of the incisor.
79
Incisal reduction of an anterior SSC.
Reduce incisal by 1-1.5 mm.
80
MD reduction of anterior SSC.
0.5-1 mm.
81
Facial reduction of anterior SSC.
1 mm.
82
Lingual reduction of anterior SSC.
0.5 mm.
83
What margins should an anterior SCC have, and where should they end?
Feathered margins ending at the gingival level.
84
When is a pulpotomy indicated?
For a primary tooth whose coronal pulp is compromised by carious involvement or trauma.
85
What is the goal of a pulpotomy?
Maintain radicular pulp vitality until physiologic exfoliation occurs.
86
Why isn't Formocresol no longer used?
Potential toxicity. But, it does have similar levels of clinical success as ferric sulfate.
87
What is used as the intracoronal medicament?
Ferric Sufate. Hemostatic agent.
88
Does Ferric Sulfate have antiseptic properties?
NO!
89
What are some contraindications for a pulpotomy?
Medical contraindications. Clinical evidence of advanced pulp degeneration (pain, parulis, fistula, inflammation, etc.) Radiographic evidence of radicular pulp inflammation. Not enough tooth structure for isolation and restoration. Clinical evidence of abnormal pulp hemorrhage upon entering the pulp chamber.
90
What shape is the access for a MX molar?
Triangular.
91
What shape is the access for a MN molar?
Ovoid.
92
When do you remove carious tissue in a pulpotomy?
PRIOR to penetrating the pulp, so you decrease the potential for bacterial contamination.
93
What bur do you use to remove the coronal pulp?
Remove using #4 or 6 round bur to the level of the canal orifices.
94
How do you assess the extent of hemorrhage? And what does hemorrhage tell you?
Absent or excessive hemorrhage may reflect that not all coronal pulp tissue was removed or reflect advanced pulp degeneration and inflammation of the radicular pulp tissue.
95
How do you control hemostasis?
Moist sterile cotton pellet over each radicular pulp stump for 1-2 min. Ferric sulfate for 10-15 seconds.
96
What do you use to restore a pulpotomy?
IRM (zinc oxide and eugenol) and SSC.
97
What is the primary aim for space maintenance.
Ensure adequate space for unerupted premolars.
98
Do you need to space maintain in anterior?
No. Space loss is less likely.
99
Indication for space maintenance.
unilateral loss of primary first or second molar after the eruption of the permanent first molar and the successor teeth is present and will not be erupting within 6 months.
100
Advantages and disadvantages of lab vs. direct space maintainers.
Less time and cost for prefabricated appliances. | Greater flexibility in fit and adaptation in lab fabricated appliances.
101
What should a properly fit band feature?
1 mm below m and d marginal ridges. No excessive space betweenthe band and tooth or excessive resistance. No contact with gingival tissue in edentulous area.
102
How do you insure that the loop does not become disloged intraorally?
Crimp both sides of the tubes once the proper length and fit is finalized.
103
What do you use to cement a band and loop?
Glass ionomer cement.
104
Why do Class 2 preps fail?
Pulp it, margins, compromised tooth structures, line angles.
105
T bands
ss
106
PAPER
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Pediatrics (5 decks)

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