Rest528A Exam 1

Front 1

1. Composite resin is placed on the facial surfaces of the teeth before placing composite and fiber ribbon on the lingual in order to:
a. seal the interproximal surfaces.
b. provide for an 180 degree wrap of composite around the teeth being splinted to provide additional cross splinting of the teeth.
c. to check the color match of the composite resin when placing the splint.
d. a and b

Back 1

d. a and b

Front 2

2. Sometimes when placing the splint, the fiber ribbon is at the surface and exposed. The recommended technique in this article for managing the exposed fiber ribbon is to:
a. finish and polish with burs and diamonds.
b. cover with a flowable composite resin before removing the dental dam.
c. coat the fiber ribbon with an unfilled resin.
d. place a second fiber ribbon to protect the first.

Back 2

b. cover with a flowable composite resin before removing the dental dam.

Front 3

3. How long do you etch enamel and dentin?

Back 3

• Dentin: 15 seconds.
• Enamel: >15 seconds (ie. 15-30 sec)

Front 4

4. What is the wavelength of light (range and correct units of measurement of wavleneth of light) that polymerizes composite resin?

Back 4

• 450-500nm

Front 5

5. Professionally dispensed vital tooth bleaching refers to:
a. materials used for bleaching that can be bought in the oral care products of the pharmacy.
b. materials used for bleaching that can be purchased over the internet at special web sites.
c. any bleaching service that can be purchased in drive-in centers.
d. materials used for vital bleaching that are given to the patient after an evaluation and diagnosis in the dental office.

Back 5

d. materials used for vital bleaching that are given to the patient after an evaluation and diagnosis in the dental office.

Front 6

6. According to this article tooth whitening refers to any procedure that:

a. placing porcelain veneers
b. placing composite resin restorations
c. any procedure that changes the shade and appearance of teeth without restorative materials.
d. adhesive bonded restorations that change a tooth’s appearance.

Back 6

c. any procedure that changes the shade and appearance of teeth without restorative materials.

Front 7

7. All the following are reasons to replace an existing Class V lingual composite resin restoration on tooth #20 EXCEPT. The EXCEPTION is
a. marginal gap larger than 0.2 mm at gingival margin
b. restoration slightly discolored
c. composite resin is overcontoured
d. fractured restoration
e. b and c

Back 7

b. restoration slightly discolored

Front 8

8. Caries penetration for a Class I can be described as two cones (triangles)
a. Tip to base
b. Base to tip
c. Tip to tip
d. Base to base

Back 8

d. Base to base

Front 9

9. Extensive carious pits and fissures for a 15 year old patient should be treatment planned for:
a. watchful waiting with a checkup interval of 1-6 months
b. sealants
c. fluoride treatment and preventive resin restorations
d. composite resin preparations and restorations that includes all the carious pits and fissures
e. preparation of only the carious areas and placement of glass ionomer cement to restore and be a preventive to reduce recurrent caries due to the fluoride release of the restorative material

Back 9

d. composite resin preparations and restorations that includes all the carious pits and fissures

Front 10

10. The progression of caries has a “V” shaped pattern. When the open end of the “V” is at the enamel tooth surface and apex end of the “V” is at the DEJ this would represent several different types of caries EXCEPT. The EXCEPTION is:
a. Class I
b. Class II
c. Class V
d. Class III

Back 10

a. Class I

Front 11

11. List the step by step for a bonded amalgam; for a dual cure composite resin (FluoroCore 2).

Back 11

- Bonded Amalgam
1. Mix one drop primer and activator
2. Apply to cavity preparation 15 sec
3. Dry from preparation 5 sec
4. Together (with assistant)
5. Mix one drop adhesive and catalyst
6. Mix amalgam
7. Apply adhesive + catalyst
8. Place amalgam right away into cavity preparation

- Dual Cure Composite Resin
1.) Prime and Bond NT - Etch and Dry (Phos. Acid Etch) Adhesive
• Etch tooth 15 seconds
• Rinse etchant off tooth for 10 seconds
• Dry tooth (dentin can be left slightly damp)
• Mix 1-2 drops of Prime and Bond NT and 1-2 drops of Self Cure Activator
• Place in cavity preparation -air thin (evaporate solvent) for 5 sec
• Light cure 30-40 seconds (deep cavity preparations require this additional light curing at the deep pulpal and gingival margins of proximal box. Especially true in pulp chambers of endodontically treated teeth)
2) Xeno IV - Self Etch Adhesive
• No etch needed this is a self-etching system
• Mix 1-2 drops of Xeno IV and 1-2 drops of Self Cure Activator
• Place in cavity preparation and scrub agitate with brush against all cavity walls for 15-20 seconds.
• Reapply a second time in cavity preparation and scrub agitate with brush against all cavity walls for 15-20 seconds
• Air thin (evaporate solvent) for 5 seconds
• Light cure 30-40 seconds (deep cavity preparations require this additional light curing at the deep pulpal and gingival margins of proximal box. Especially true in pulp chambers endodontically treated teeth)

Front 12

12. All the following are examples of tooth discolorations due to intrinsic staining except. The exception is:
a. Tetracycline induced staining.
b. endodontic staining.
c. enamel hypoplasia.
d. Caries

Back 12

c. enamel hypoplasia.

Front 13

13. With vital tooth bleaching adverse reactions were reported by patients. The highest reported adverse reaction during tooth whitening with bleaching is
a. gingival irritation.
b. tooth sensitivity during bleaching.
c. trays are difficult to insert.
d. bad taste of bleach.

Back 13

b. tooth sensitivity during bleaching.

Front 14

14. The most conservative treatment for tooth discoloration is
a. porcelain veneers.
b. bleaching.
c. composite resin veneering.
d. ceramic crowns.

Back 14

b. bleaching.

Front 15

15. Bleaching is a technique to lighten the color of teeth darkened by
a. intrinsic staining.
b. extrinsic staining.
c. entopic staining.
d. a and b .

Back 15

d. a and b .

Front 16

16. Patients with a diagnosis for the best prognosis with vital bleaching include all the following EXCEPT one. The EXCEPTION is
- Yellowing of the teeth with a systemic or developmental cause.
- Mild tetracycline staining.
- Mild flourosis staining
- Discolored porcelain

Back 16

- Discolored porcelain

Front 17

17. In some clinical studies with patients with moderate to severe tetracycline staining vital tooth bleaching has been
a. Ineffective.
b. has had a shade change when used over long periods of time, e.g., 6 months.
c. must use a combined in-office and tray bleaching technique.
d. should never be discussed with a patient.

Back 17

b. has had a shade change when used over long periods of time, e.g., 6 months.

Front 18

18. Periodontal splinting has been accomplished with all the following techniques EXCEPT. The EXCEPTION is
a. fixed partial dentures (crown and bridge)
b. polyvinyl siloxane bonding
c. non-parallel pin splint
d. direct adhesive composite with fiber reinforcement

Back 18

b. polyvinyl siloxane bonding

Front 19

19. The clinical technique for placing a fiber splint uses an adhesive acid etch technique. All the following are correct statements EXCEPT. The EXCEPTION is
a. before acid etching, the facial and lingual surfaces for the teeth must be cleaned with an abrasive paste on a prophylaxis cup.
b. Before etching the interproximal surfaces of the teeth, they should be cleaned with abrasive strips or sometimes diamond abrasive burs to remove stain.
c. No cleaning of the teeth is necessary, only etching the teeth before bonding.
d. The teeth should be scaled and root planed before fiber splint placement.

Back 19

c. No cleaning of the teeth is necessary, only etching the teeth before bonding.

Front 20

20. What determines the outline form of a Class V with caries?

Back 20

Answer: The extent of caries does!

Front 21

21. What is the depth of the largest increment you should place at one time in a composite resin preparation and why?

Back 21

Composite resin placed in increments no greater than 2mm. Placing composite in increments allows for complete polymerization and controls polymerization shrinkage.

Front 22

22. One of the problems with composite resins is volumetric polymerization shrinkage. This shrinkage can lead to which problems:
a. gap formation at the margins
b. microleakage
c. recurrent caries
d. post operative sensitivity
e. all the above

Back 22

e. all the above

Front 23

23. Composite resin will wear in stress bearing areas. The amount of wear is dependent upon
a. size of preparation
b. parafunctional habits
c. bonding agent used
d. time of etching
e. tooth position in arch

a. 1, 2 and 3 only
b. 1, 2, and 4 only
c. 1, 2, and 5 only
d. 1, 2, 3, and 4 only
e. 1, 2, 4, and 5 only

Back 23

c. 1, 2, and 5 only ****

Front 24

24. You have placed a Class V composite resin. There is gross excess. List the sequence for finishing and polishing instruments for that composite resin.

Back 24

Basically you go from most course (finishing burs/diamonds)  medium course (sand disks except the lightest blue color, enhance cups w/o polishing paste)  finest (polishing paste w/ prophy cups, lightest blue sand disks)

Front 25

25. Bonded amalgam compared to pin retention for amalgam which is better?

Back 25

Research shows that both are equally effective

Front 26

26. Reasons for amalgam restoration replacement include:
1. marginal void at gingival margin of Class 2 with no active caries
2. inadequate anatomic form
3. gingival overhang
4. marginal ridge height discrepancy causing periodontal pathology
5. fracture
6. stick with explorer in ditched margin that is 0.2 mm in width

Back 26

1. marginal void at gingival margin of Class 2 with no active caries
2. inadequate anatomic form
3. gingival overhang
4. marginal ridge height discrepancy causing periodontal pathology
5. fracture

Front 27

27. In-office bleaching :
a. must be done with a light source.
b. must be done with a heat source.
c. uses hydrogen peroxides in the 6-10% range.
d. with or without a light source can give a whitening result.

Back 27

d. with or without a light source can give a whitening result.

Front 28

28. To minimize tooth sensitivity during vital tooth bleaching for patients having sensitivity a clinician can recommend that the patient:
a. decrease time the tray is worn the first week.
b. use lower concentrations of peroxide bleaching gels with a desensitizing agent.
c. use a desensitizing toothpaste before starting the bleaching in the tray for 30 minutes a day a week before starting bleaching.
d. use a professionally dispensed desensitizing gel for use with bleaching.
e. all the above can be used to minimize tooth sensitivity.

Back 28

e. all the above can be used to minimize tooth sensitivity.

Front 29

29. The bitewing radiograph is the film of choice when evaluating
1. root surfaces
2. horizontal bone heights
3. proximal caries
4. periapical pathosis
5. extent of occlusal caries
6. the PDL space
a. 1, 2, 3, and 6
b. 1, 2, 3, and 5
c. 2, 3, and 5
d. 2, 3, 4, and 6
e. 1, 3, 4 and 5

Back 29

c. 2, 3, and 5

Front 30

30. All the following are techniques that help achieve a predictable, anatomic proximal contact EXCEPT. The EXCEPTION is
a. thick, rigid copper bands
b. thin, dead soft stainless steel matrix bands
c. prewedging the tooth prior to tooth preparation to achieve rapid separation to compensate for thickness of the matrix band.
d. Devices to push against the matrix band during light curing

Back 30

a. thick, rigid copper bands

Front 31

31. The primary reason(s) for periodontal splinting of mobile teeth is (are)
a. primary occlusal trauma
b. secondary occlusal trauma
c. progressive mobility
d. all the above

Back 31

d. all the above

Front 32

32. To make the Ribbond THM reinforcement ribbon bondable, the ribbon is:
a. wetted with an unfilled resin.
b. wetted with a flowable composite.
c. etched with phosphoric acid.
d. nothing needs to be done, it is usable right from the box.

Back 32

a. wetted with an unfilled resin.

Front 33

33. The gingival interproximal areas are blocked out using a polyvinyl siloxane impression material to minimize excess composite resin in these areas when placing the splint. The block out is placed:
a. after cleaning the teeth.
b. after etching the teeth.
c. after application of the bonding resin.
d. after application of the composite resin and fiber ribbon.

Back 33

b. after etching the teeth.

Front 34

34. In-office bleaching typically use as the bleaching agent a:
a. calcium peroxide.
b. hydrogen peroxide
c. sodium perborate.
d. sodium hypochlorite

Back 34

b. hydrogen peroxide

Front 35

35. Tooth hypersensitivity is an adverse reaction reported by patients with doing tray, vital tooth bleaching. Tooth hypersensitivity will
a. increase and continue while bleaching.
b. can cause the need for endodontic treatment.
c. is transient and is no longer present when the treatment is completed.
d. is directly related to ginigival recession.

Back 35

c. is transient and is no longer present when the treatment is completed

Front 36

36. With the current available evidence that moderately sized preparations restored with composite resin can be considered amalgam alternatives.
a. True
b. False

Back 36

a. True

Front 37

37. According to the Consensus report of 1998 by the American Dental Association Council on Scientific Affairs contraindications for the use of posterior composite resins include all the following EXCEPT. The EXCEPTION is:
a. Class II preparations.
b. Teeth that demonstrate heavy occlusal stress
c. Sites that cannot be isolated
d. Patients allergic or sensitive to resin based composites.

Back 37

a. Class II preparations.

Front 38

38. Primary occlusal trauma is defined as
a. wear on teeth during parafunction.
b. injury that results from excessive occlusal forces applied to a tooth or teeth with normal periodontal support.
c. injury that results from normal occlusal forces applied to a tooth or teeth with inadequate periodontal support.
d. mobility of teeth due to gingival inflammation and bone loss.

Back 38

b. injury that results from excessive occlusal forces applied to a tooth or teeth with normal periodontal support.

Front 39

39. In the past direct adhesive composite resins embedded with wires, metal mesh, and nylon mesh had clinical failures because
e. they were too narrow for teeth
f. they were too wide for teeth
g. they were too thick for teeth
h. they were only mechanically locked around the resin restorative material and not chemically bonded into the resins used.

Back 39

h. they were only mechanically locked around the resin restorative material and not chemically bonded into the resins used.

Front 40

40. Trays fabricated from thin, flexible vinyl materials are the standard for vital tooth bleaching. Scalloping of trays should be done for:
a. to provide the patient with a special effect of the tray.
b. is not necessary when bleaching irregardless of concentration.
c. in-office light enhanced bleaching.
d. for at-home tray bleaching with higher concentrations of carbamide peroxide and hydrogen peroxide gels.

Back 40

d. for at-home tray bleaching with higher concentrations of carbamide peroxide and hydrogen peroxide gels.

Front 41

41. A number of trayless system for professional dispensing have been introduced. One of the most popular are whitestrips. Drawbacks to bleaching with whitestrips are that they:
a. are difficult to apply when there is anterior tooth misalignment.
b. don’t work as effectively as tray vital bleaching.
c. only can whiten the six anterior teeth in maxillary and mandibular arches.
d. a and b.
e. a and c.

Back 41

e. a and c.