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Restorative Procedures > Restorative - Final Exam Study Questions > Flashcards

Restorative - Final Exam Study Questions Flashcards

1
Q

What class of cavities is a matrix used for?

A

Class II, III, and IV

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2
Q

What is the shape and material of a maxtrix determined by?

A

The shape of a matrix system and or the material used is determined by its location and for what type of cavity prepartion.

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3
Q

What are circumferential matrices usually used for?

A

Matrices that are circumferential are usually used to replace proximal, facial, or lingual walls.

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4
Q

What are sectional matrices usually used for?

A

Sectional matrices are used for missing proximal walls.

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5
Q

What are cervical matrices used for?

A

Cervical matrices are used for Class IV restorations.

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6
Q

Benefit of Clear Plastic Matrix system?

A

A matrix system made of clear plastic will allow the operator to utilize the curing light more effectively when placing a light cured restorative material. They are often used for anterior restorations of Class IV buccal restorations.

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7
Q

What are Wedges?

A

Wedges may be used in conjunction with a matrix system to achieve proper interproximal contacts. They are placed next to the matrix band using wedge placement forceps or cotton forceps, into the embrasure space for each missing proximal wall.

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8
Q

The function of wedges is to:

A

Hold the matrix band firmly against the gingival margin of the preparation
-To prevent overhangs on restorations.
- Provide slight separation between the teeth, ensuring an accurate contact space and compensating for the thickness of the matrix band, creating a tight contact between the finished restoration and the adjacent tooth

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9
Q

The most commonly used shape of wedge is?

A

The most commonly used type of wedge is triangular.

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10
Q

What to consider when using a wedge?

A
  1. The wedge must be wide enough so that pressure is applied to the apical and gingival walls of the preparation.
  2. The wedge presses the band against the tooth and causes a slight separation of the teeth.

3.The wedge is slightly wider than the distance between the cervical portions of adjacent teeth.

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11
Q

What class of cavities is Celluloid strip matrix system used for?

A

Class III or IV when the proximal wall of an anterior tooth is missing

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12
Q

The plastic matrix (also called celluloid strip or mylar strip) and wedge serve the following purposes during the restoration process:

A

-The matrix is placed interproximal before the etching and bonding of the tooth to protect adjacent teeth from these materials.
-After the placement of composite material, the matrix is pulled tightly around the tooth to help in reconstructing its natural contour.
-The clear plastic matrix allows the curing light to penetrate the material, thereby completing the curing process.

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13
Q

What is the T-band matrix system?

A

The T-band is a band in the shape of a T that can be easily placed, contoured and removed. When formed, the top portion of the T allows the straight portion to adjust and fit the circumference of a primary molar.

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14
Q

Properties of a T-Band Matrix

A

-The T-band is available in two types, narrow width, and wide width, with a choice of stainless steel or brass material.
-The material is sturdy but can be adequately contoured.
-The loop may be prepared in advance and slipped over the tooth and tightened before the preparation is made to save time.

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15
Q

What is a sectional matrix system?

A

The sectional matrix system facilitates the implementation of tight, anatomically correct contacts for Class II and MOD posterior composite restorations. The sectional system uses small contoured sections, rather than long cicrumferential bands, which are placed interproximally and secured by tension rings.

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16
Q

Components of a Sectional Matrix System

A

1.Different sizes of contoured sectional matrix beans.
2.Two tension rings with differing tine lengths (long and short). The ring is applied to the tooth after the matrix bean is in place.
3. Tension ring forceps used to open the ring.

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17
Q

How to use a sectional matrix system

A

One sectional matrix bean is applied for each interproximal surface being restored. The system allows for the overlapping of tension rings when doing a MOD or for multiple restorations in one quadrant. Using the tension ring forceps, the tension rings are applied to the tooth after the sectional matrix bean and wedge is in place. The tension ring is placed with the tines between the sectional matrix bean and the wedge.

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18
Q

What is a Tofflemire Retainer?

A

The Tofflemire matrix system is a metal device consisting of a retainer and a band used for posterior restorations. It is one of the oldest systems and most commonly used.

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19
Q

The 3 types of retainers:

A
  1. Universal (buccal)
  2. Contra-angle (lingual)
  3. Pediatric
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20
Q

Description of Universal (buccal) retainer?

A

The buccal retainer has guide channels that are flat or even with the diagonal slot vise. This retainer sits flat against the teeth in the mucco-buccal fold and the retainer is always placed on the buccal surface of the tooth.

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21
Q

Description of Contra-angle (lingual) retainer?

A

The lingual retainer has the guide channels set at an angle to the diagonal slot vise and this retainer is always placed on the lingual surface of the teeth. When the retainer is in place, it lies at an angle to the teeth so the metal does not damage the enamel surface of the remaining teeth in the arch.

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22
Q

Description of Pediatric retainer?

A

The pediatric tofflemire retainer is smaller in all dimensions than the Universal or Lingual retainers to accommodate the smaller mouth of a child.

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23
Q

Retainer Components

A
  1. Guide Channels
  2. Diagonal Slot Vise
  3. The Spindle
  4. Inner Nut
  5. The Outer Nut
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24
Q

What is the purpose of guide channels on retainer?

A

Enable the loop of the matrix band to be guided in one of three directions. The direction selected is determined by the quadrant involved.

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25
Q

What is the purpose of a Diagonal Slot Vise on retainer?

A

Is used to position the ends of the matrix band within the retainer.

26
Q

What is the Spindle purpose on retainer?

A

Is a screw that is used to hold the ends of the matrix band securely in the diagonal slot vise.

27
Q

What is the purpose of the Inner Nut on retainer?

A

Is used to adjust the size of the matrix band around the tooth

28
Q

What is the purpose of the Outer Nut on a retainer?

A

Is used to tighten the spindle and position it within the diagonal slot vise.

29
Q

How to assmble a retainer?

A
  1. Look carefully at your retainer and note the side with the diagonal slot where the ends of the band are placed into.
  2. This side of the retainer is always placed toward the gingival margin of the tooth.
    3.This may be easier to remember when you realize that after the operator has placed the restoration, they will remove the matrix retainer first, temporarily leaving the band in position.
    4.The only way this can be done is if the diagonal slot is toward the gingiva and the retainer can be lifted away from the band.
  3. Look at the spindle in your retainer.
  4. Before beginning to assemble the retainer and band, the spindle point must be clear of the diagonal slot.
  5. Turn the spindle away from the diagonal slot.
  6. To adjust the spindle, turn the outer nut counter-clockwise until the spindle is no longer visible in the diagonal slot.

CAUTION – if you turn the spindle too far counter-clockwise, the diagonal slot vise will fall off the spindle. If this happens, insert the end of the spindle into the diagonal slot vise and turn the outer nut clockwise.

30
Q

How many classifications of cavities are there?

A

6

31
Q

Who invented Cavity Classifications?

A

Dr. Black

32
Q

How are cavities classified?

A

By the surfaces involved

33
Q

What classification occurs on the surfaces associated with pits and/or fissures?

A

Class 1

34
Q

What classification of decay occurs on the proximal surfaces of the premolar and molars?

A

Class 2

35
Q

What classification of decay occurs on anterior teeth and involves an interproximal surface only?

A

Class 3

36
Q

What classification of decay occurs on the interproximal surface and involves the Incisal edge of the tooth?

A

Class 4

37
Q

What type of decay occurs on the gingival 3rd of the lingual or buccal (facial) surface on any tooth

A

Class 5

38
Q

What is Class VI decay caused by?

A

Decay that occurs as a result of abrasion (wear) and defects on the incisal or occlusal edge of any
tooth (smooth surface).

39
Q

Tooth decay, is also referred to as…

A

Cavity, dental lesions or caries

40
Q

A 16-year-old patient, came for their 6 months check up with the dentist. The dentist diagnosed tooth
2.6 with having decay involving the MOD surfaces. What classification of decay is present on the
patient’s tooth?

A

Class 2

41
Q

The above patient came back 1 year later and the dentist diagnosed the same tooth (2.6 MOD) with
decay again. The patient just had the tooth restored. What kind of decay is present on the patient’s
tooth?

A

Secondary (recurrent) caries that occur around restorations and require replacement

42
Q

A 5-year-old patient has extensive restorations present on their primary teeth. The grandmother
always let them fall asleep drinking warm milk in the past. What type of decay do you think the
patient had in the past?

A

Rampant caries – multiple lesions throughout the mouth caused by excessive intake of
sucrose

43
Q

The following teeth; 4.5 buccal pit, 4.6 occlusal, 2.1 lingual pit have cavities. The dentist described
them to you by the surfaces involved. Is the classification of these cavities considered?

A

) Simple Carious Lesions involves only 1 tooth surface

44
Q

The following teeth: 4.5 MO, 4.6 DO, 2.1 MI have cavities. The dentist described them to you by the
surfaces involved. Is the classification of these cavities considered?

A

Conservative Carious Lesions involve 2 tooth surfaces

45
Q

The following teeth; 4.5 MOD, 4.6 MODB, 2.1 MIL have a cavity. The dentist described them to you by
the surfaces involved. Which cavity classification surface is involved?

A

Comprehensive Carious Lesions involve 3 or more tooth surfaces, along with the removal of a
cusp.

46
Q

What are the objectives for initial cavity preparation?

A

Outline form
Resistance form
Retention form
Convenience form

47
Q

Which step in the initial preparation allows the dentist to determine the design?

A

Outline Form

48
Q

What are the three steps in the final preparation process?

A

a) Remove any remaining enamel, diseased dentin or old restorative material within the
preparation.
b) Insert additional resistance and retention notches, grooves and coves to provide strength in
maintaining the restoration.
c) Place dental materials.

49
Q

What instrument is used to bevel the mesial cervical walls in a cavity preparation?

A

Gingival margin trimmer mesial

50
Q

Which instrument is used with a push motion to cut, clean and smooth the walls in a cavity
preparation?

A

Enamel hatchet

51
Q

The instruments whose function is to clean and smooth the floor and walls in a cavity prep? It is
also used with a pulling motion.

A

Enamel hoe

52
Q

Which instrument is used to create bevels on the distal cervical margin of the preparation?

A

Gingival margin trimmer distal

53
Q

What instrument is used to remove carious dentin in a cavity preparation.

A

Spoon excavator

54
Q

Which instrument is used with a push motion to plane and cleave enamel in a cavity preparation
and has a curved blade on the working end?

A

Wedelstaedt chisel

55
Q

What bur adds retention to the walls of the cavity preparation and also has a “flat” top?

A

inverted cone

56
Q

The bur that cuts into and forms the inner walls of the cavity preparation is the:

A

Fissure bur (straight, tapered, or crosscut)

57
Q

What instrument is used to accentuate line and point angles in a cavity preparation?

A

Angle former

58
Q

Which bur removes caries, and can open the tooth for endodontic treatment?

A

Round bur

59
Q

If patient is feeling closterphobic when a dental dam is applied - what can you do to assist?

A

Cut a hole in the dam, fold the top of the dam down below the patients nose

60
Q
A

Restorative Procedures (18 decks)

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