Knowledge-Based Assessment (KBA) Practice Tool - CADTR Online Self-Assessment Tools

Which of the following metals is considered toxic and should not be a component of orthodontic silver solder?

Question 1 of 75

0%

1 Zinc
2 Nickel
3 Copper
4 Cadmium

Please make a selection

The correct answer is:

4 Cadmium

Which of the following reasons is the most important for taking both intraoral and extraoral photographs of the patient?

Question 2 of 75

1%

1 Selection for esthetics
2 Selection of prosthetic materials
3 Selection of design type for function
4 Selection of design type for phonetics

Please make a selection

The correct answer is:

1 Selection for esthetics

Beryllium in an alloy can have toxic effects while fabricating a prosthesis. Which PPE would be used to reduce the risk of toxicity from Beryllium?

Question 3 of 75

3%

1 Gloves
2 Lab coat
3 Facemask
4 Safety glasses

Please make a selection

The correct answer is:

3 Facemask

If asked to perform an action outside of the scope of practice in their province, which actions would be an RDT’s best course of action?

Question 4 of 75

4%

1 Decline to provide the service.
2 Refer to another RDT who provides the service.
3 Report the request to your provincial organization.
4 Refer to a health professional able to provide the service in their scope of practice.

Please make a selection

The correct answer is:

1 Decline to provide the service.

Which of the following major connectors is used on a maxillary RPD when there is a hard mid-line suture or maxillary torus?

Question 5 of 75

5%

1 Double palatal bar
2 Full palate coverage
3 Palatal plate or strap
4 Single anterior palatal bar

Please make a selection

The correct answer is:

1 Double palatal bar

An Rx requests a set of dentures to be made with 30° anatomical teeth for a 48 year old patient. The models show that the patient has advanced resorption of the mandibular ridges. What technical limitation contradicts the Rx order?

Question 6 of 75

7%

1 The steeper cusp heights will cause cheek biting.
2 The denture has a greater chance of being dislodged while chewing.
3 The anatomical teeth look esthetically too rounded for an older patient.
4 Anatomical teeth are more expensive to use than semi-anatomical teeth and non-anatomical teeth.

Please make a selection

The correct answer is:

2 The denture has a greater chance of being dislodged while chewing.

A new plaster technician is having a hard time pouring impression without trapping bubbles in the cast. As the RDT in charge, what is the most supportive way to handle the situation?

Question 7 of 75

8%

1 Ask the new technician to go back to school for further improvement.
2 Re-assign the new technician to a different position in another department.
3 Do a demonstration on how to pour the impression and ask the technician to repeat the process.
4 Give the technician a stern verbal disapproval. Dismiss the technician immediately due to incompetence.

Please make a selection

The correct answer is:

3 Do a demonstration on how to pour the impression and ask the technician to repeat the process.

What do the manufacturers’ instructions say is the way to remove the chuck for cleaning?

Question 8 of 75

9%

1 Turn the chuck counterclockwise using the spanner wrench.
2 Turn the chuck clockwise using the spanner wrench.
3 Turn the bur locking ring to the closed position.
4 Turn the bur locking ring to the open position.

Please make a selection

The correct answer is:

1 Turn the chuck counterclockwise using the spanner wrench.

What is the most appropriate way to mix Polymethyl methacrylate (PMMA) when preparing to pack a complete upper denture mould?

Question 9 of 75

11%

1 Following best judgement for a homogeneous mix.
2 Adding polymer then monomer in a rubber bowl.
3 Adding polymer then monomer in a glass bowl.
4 Following manufacturer's instructions.

Please make a selection

The correct answer is:

4 Following manufacturer's instructions.

Which of the following guidelines relate to alginate impression materials? Select all that apply.

Question 10 of 75

12%

1 They are best poured with stone immediately.
2 They are best poured with stone after drying for 30 minutes.
3 They are best used for primary impressions for complete dentures.
4 They are best used for definitive impressions for crowns and bridges.

Please make a selection

The correct answer is:

1 They are best poured with stone immediately.
3 They are best used for primary impressions for complete dentures.

What part of the Rx shown, makes it unacceptable for a registered dental technician/technologist to complete this case?

Question 11 of 75

13%

1 1
2 2
3 3
4 4
5 5
6 6

Please make a selection

The correct answer is:

6 6

Which part of an RPD clasp is the retentive component?

Question 12 of 75

15%

1 Occlusal rest
2 Minor connector
3 Rigid portion of the clasp arm
4 Resilient portion of the clasp arm

Please make a selection

The correct answer is:

4 Resilient portion of the clasp arm

When working with methyl methacrylate monomer with appropriate PPE, which of the following precautions should be taken?

Question 13 of 75

16%

1 Make sure there is an open flame nearby.
2 Make sure the work area is well ventilated.
3 Make sure the work area is uncontaminated.
4 Make sure all gaps in the mask are closed with sealant tape.

Please make a selection

The correct answer is:

2 Make sure the work area is well ventilated.

Into which of the following environments should an alginate impression be placed if it must be stored for a few minutes before the cast is poured?

Question 14 of 75

17%

1 Water
2 100% relative humidity
3 In a 1% aqueous calcium sulfate solution
4 In a mix of 1:1 special liquid to distilled water

Please make a selection

The correct answer is:

2 100% relative humidity

Which proximal surface of a tooth is closest toward the midline of the body?

Question 15 of 75

19%

1 Facial
2 Mesial
3 Incisal
4 Occlusal

Please make a selection

The correct answer is:

2 Mesial

Which of the following practices is most effective in obtaining an accurate shade when performing a shade matching on a patient?

Question 16 of 75

20%

1 Ensure the room has no windows so you eliminate shadows.
2 Direct a strong light into the mouth to provide adequate illumination.
3 Place a brightly coloured dental bib on the patient to provide contrast.
4 Choose the shade in a neutrally coloured room with a broad spectrum light source.

Please make a selection

The correct answer is:

4 Choose the shade in a neutrally coloured room with a broad spectrum light source.

Which of the highlighted regions in the image below shows insufficient quality of the impression.

Question 17 of 75

21%

1 1
2 2
3 3
4 4

Please make a selection

The correct answer is:

3 3

Which of the following tools are classified as semi-critical items for disinfection? Select all that apply.

Question 18 of 75

23%

1 Face bow
2 Shade tabs
3 Surgical stent
4 Articulation paper

Please make a selection

The correct answer is:

1 Face bow
2 Shade tabs

Which of the following statements correctly describes the orthodontic appliance in relation to the Rx shown?

Question 19 of 75

24%

1 The appliance shown matches the request.
2 The clasps shown do not meet the request.
3 The occlusal rests shown do meet the request.
4 The labial bow shown does not meet the request.

Please make a selection

The correct answer is:

2 The clasps shown do not meet the request.

The Dentist has prescribed a set of complete dentures to be fabricated. The Rx requests:

Place teeth in positions that will provide the best denture stability.
Set mandibular anterior teeth 2 mm anterior to the center of the labial vestibule.
Use the midline shown on the returned maxillary wax rim.
Use the labial contour of the maxillary occlusal rim to set the labial position of the maxillary centrals (measures 7 mm anterior to the incisal papilla).

What is the problem with the Rx request?

Question 20 of 75

25%

1 Labial support cannot be measured from the incisal papilla.
2 Using the scribed midline may not center the centrals with the labial frenum.
3 Using the requested measurement for the mandibular anterior teeth will put them in a position of creating undesirable cantilever forces.
4 Using the requested measurement for the maxillary anterior teeth will put them in a position of creating undesirable cantilever forces.

Please make a selection

The correct answer is:

3 Using the requested measurement for the mandibular anterior teeth will put them in a position of creating undesirable cantilever forces.

Which agency is responsible for ensuring an RDT’s compliance with requirements for continuing education and professional liability insurance in regulated jurisdictions?

Question 21 of 75

27%

1 Health Canada
2 Provincial Health Board
3 Professional Association
4 Canadian Provincial/Territorial Dental Technology Regulator

Please make a selection

The correct answer is:

4 Canadian Provincial/Territorial Dental Technology Regulator

The Rx from the dental office requests an implant crown and there is an open tray impression coping embedded in the impression. What additional component would a dental technologist/technician need to enable them to pour the impression?

Question 22 of 75

28%

1 Cover screw
2 Implant analog
3 Implant fixture
4 Colour of the implant packaging

Please make a selection

The correct answer is:

2 Implant analog

A completed three-unit bridge has been sent to the quality control department. Which of the following items should the RDT verify? Select all that apply.

Question 23 of 75

29%

1 That the case matches the prescription
2 That the invoice matches the prescription
3 The interproximal and occlusual contacts
4 That the bridge seats positively with no movement

Please make a selection

The correct answer is:

1 That the case matches the prescription
3 The interproximal and occlusual contacts
4 That the bridge seats positively with no movement

What is the best way to eliminate the wax denture base in preparation for the acrylic packing procedure?

Question 24 of 75

31%

1 Open the flask and lift the wax from the mould.
2 Open the flask and rinse the mould with boiling water.
3 Place the flask in boiling water until the wax has softened, then open and rinse the flask with boiling water.
4 Place the flask in boiling water until the wax turns molten, then open and rinse the flask with boiling water.

Please make a selection

The correct answer is:

3 Place the flask in boiling water until the wax has softened, then open and rinse the flask with boiling water.

What tooth morphology describes a balanced occlusal scheme in complete removable dentures? Select all that apply.

Question 25 of 75

32%

1 0 degree non-anatomic
2 20 degree semi-anatomic
3 23 degree semi-anatomic
4 33 degree anatomic

Please make a selection

The correct answer is:

2 20 degree semi-anatomic
3 23 degree semi-anatomic
4 33 degree anatomic

For a case specified as a nickel-free restoration due to patient allergies, which alloy described in the IdentAlloy certificates below should be avoided?

Question 26 of 75

33%

1 The orange label
2 The purple label
3 The green label

Please make a selection

The correct answer is:

3 The green label

Which major connector design would be best for a cast partial lower denture on a mandibular partial case that has a large lingual torus?

Question 27 of 75

35%

1 Lingual Bar
2 Kennedy Bar
3 Palatal Strap
4 Lingual Apron

Please make a selection

The correct answer is:

4 Lingual Apron

Which of the following will cause separation of porcelain from metal in a porcelain fused to metal (PFM) bridge?

Question 28 of 75

36%

1 Occlusal contacts on porcelain
2 More than 60% vertical overlap of anterior teeth
3 Failure to use equal amounts of metal and porcelain
4 Contamination of metal before the application of porcelain

Please make a selection

The correct answer is:

4 Contamination of metal before the application of porcelain

Where is compensating curve found?

Question 29 of 75

37%

1 In the palate
2 In partial denture
3 In all natural dentitions
4 In a balanced complete denture

Please make a selection

The correct answer is:

4 In a balanced complete denture

When duplicating working models in the lab, the use of which of the following materials will best comply with sustainable business practices within dental technology (e.g. recycling, energy conservation)?

Question 30 of 75

39%

1 Alginate
2 Polyvinyl Siloxane
3 Reversible hydrocolloid
4 Silicone duplicating material

Please make a selection

The correct answer is:

3 Reversible hydrocolloid

What preparations should be done to a denture that is receiving a cold cure acrylic reline? Select all that apply.

Question 31 of 75

40%

1 Block out all undercuts.
2 Paint with a coat of separator.
3 Roughen and reduce the intaglio surface.
4 Paint the roughened surface with monomer.
5 Remove all base material only leaving the teeth.

Please make a selection

The correct answer is:

3 Roughen and reduce the intaglio surface.
4 Paint the roughened surface with monomer.

Which design of a major connector of a mandibular RPD should be used with little or no lingual vestibule?

Question 32 of 75

41%

1 Labial bar
2 Lingual bar
3 Cingulum bar
4 Double bar (Kennedy)

Please make a selection

The correct answer is:

3 Cingulum bar

Which of these tooth identifiers describes the mandibular left first deciduous molar?

Question 33 of 75

43%

1 2.4
2 6.4
3 7.4
4 8.4

Please make a selection

The correct answer is:

3 7.4

What is the purpose of the maxillomandibular records appointment for the dental technician?

Question 34 of 75

44%

1 To transfer the correct orientation of the master casts and occlusal rims to the atriculator
2 To relocate the correct orientation of the implant fixture to the master cast
3 To calculate the bone density of the maxilla and mandible
4 To fixate the maxillary and mandibular teeth

Please make a selection

The correct answer is:

1 To transfer the correct orientation of the master casts and occlusal rims to the atriculator

Which of the following descriptions refers to reciprocation, as applied to cast removable partial dentures? Select all that apply.

Question 35 of 75

45%

1 Resistance to flex pressure of the clasp arm.
2 The return to a passive state of the flexed clasp.
3 The function of the occlusal rest to counteract occlusal forces.
4 The function of the clasp arm to counteract the retentive clasp arm.

Please make a selection

The correct answer is:

1 Resistance to flex pressure of the clasp arm.
4 The function of the clasp arm to counteract the retentive clasp arm.

Which of the following appliances are used in the final phase of orthodontic treatment? Select all that apply.

Question 36 of 75

47%

1 Essix retainer
2 Hawley retainer
3 Rapid palatal expander
4 Band loop space maintainer

Please make a selection

The correct answer is:

1 Essix retainer
2 Hawley retainer

Which of the following sides corresponds to the balancing side in full denture construction?

Question 37 of 75

48%

1 The side towards which the mandible is moved
2 The side posterior to which the maxilla is moved
3 The side inferior to which the mandible is moved
4 The side opposite to which the mandible is moved

Please make a selection

The correct answer is:

4 The side opposite to which the mandible is moved

A defective and broken Band and Loop Space Maintainer is being returned by a dentist. The loop came off the band at the solder joints. What can be the reasons for the defect during the fabrication? Select all that apply.

Question 38 of 75

49%

1 Too much solder was applied.
2 The solder joints were over-heated.
3 The solder joints did not have sufficient oxidation.
4 The solder joints were over trimmed and the arms of the loop wires were exposed.

Please make a selection

The correct answer is:

2 The solder joints were over-heated.
4 The solder joints were over trimmed and the arms of the loop wires were exposed.

When checking the Rx to a 3-unit PFM finished bridge, the RDT finds it does not adhere to the Rx. The Rx asked for a 3-unit bridge with PFMs # 45, 46 and a full gold crown (FGC) #47. Which of the following departments is most likely responsible for not following the Rx? Select the best answer:

Question 39 of 75

51%

1 The model department
2 The wax up department
3 The ceramic department
4 The metal finishing department
5 The infection control department

Please make a selection

The correct answer is:

2 The wax up department

What is the function of a scan body in digital dentistry?

Question 40 of 75

52%

1 To create the Hounsfield scale unit
2 To correct for artifact in the digital scan
3 To obtain the boarders of the digital cast
4 To translate the position of an implant into a digital file

Please make a selection

The correct answer is:

4 To translate the position of an implant into a digital file

To ensure proper tracking of material usage and case parameters for each individual patient, what information should be on both the Rx and patient invoice? Select all that apply.

Question 41 of 75

53%

1 Patient age and gender
2 Patient information and items purchased for the case (i.e., gold, implant components)
3 Description of prothesis made
4 Alloy and Zirconia identification stickers provided by the manufacturers

Please make a selection

The correct answer is:

2 Patient information and items purchased for the case (i.e., gold, implant components)
3 Description of prothesis made
4 Alloy and Zirconia identification stickers provided by the manufacturers

Which of the highlighted areas on this Rx sent to the dental lab needs clarification or additional information to fabricate the prosthesis?

Question 42 of 75

55%

1 1
2 2
3 3
4 4

Please make a selection

The correct answer is:

1 1

Which of the following considerations would apply when selecting the type of porcelain to veneer a substructure? Select all that apply.

Question 43 of 75

56%

1 Brand name requested by Dentist.
2 Type of material used in fabrication of the substructure.
3 The manufacturer of the substructure material.
4 Porcelain which closely matches the CTE of the substructure.

Please make a selection

The correct answer is:

2 Type of material used in fabrication of the substructure.
4 Porcelain which closely matches the CTE of the substructure.

Which of the following statements describe the ethical behaviors expected of an RDT in accordance with the professional Code of Ethics? Select all that apply.

Question 44 of 75

57%

1 Maintain patient confidentiality.
2 Apply ethical and appropriate billing practices.
3 Refuse to provide services when a mental disability has been identified.
4 Refrain from making personally or public disparaging comments about the qualifications or procedures of a colleague or any member of the dental team.
5 Only provide services without a prescribing practitioner when the patients are family members or staff and they sign a consent form.

Please make a selection

The correct answer is:

1 Maintain patient confidentiality.
2 Apply ethical and appropriate billing practices.
4 Refrain from making personally or public disparaging comments about the qualifications or procedures of a colleague or any member of the dental team.

Which are the two most critical points of infection prevention and control for a crown and bridge case, according to provincial and federal regulations and manufacturer’s requirements? Select the two best answers.

Question 45 of 75

59%

1 At point of pick up
2 Upon delivery to the laboratory
3 As soon as work has been completed and billed
4 Once work had been approved for delivery by a RDT
5 Once all case components have been placed in a work pan

Please make a selection

The correct answer is:

2 Upon delivery to the laboratory
4 Once work had been approved for delivery by a RDT

Which of the following anatomical references describes the anteroposterior imaginary curved line in natural dentition from the mandibular anterior teeth to the most posterior mandibular molar?

Question 46 of 75

60%

1 Curve of Spee
2 Curve of Wilson
3 Curve of Monson
4 Curve of Compensation

Please make a selection

The correct answer is:

1 Curve of Spee

A dental technologist/technician has been working in a specialized crown, bridge, and implant laboratory for 15 years. A newly graduated dental technologist/technician has recently joined the team. The new employee is very keen and excited to have a hand in all the cases in the laboratory. The senior technician observes the new technician attempting to add analogs to a final open tray impression but appears to be having difficulty aligning the interface of the impression coping to the interface of the analog. This seems to frustrate the new technician and they become more forceful with the componentry. What is the best course of action for the senior technician to take?

Question 47 of 75

61%

1 Allow the new technician to continue as experience is often the best teacher.
2 Reduce the new employee's access to the case to ensure they do not cause damage to delicate impressions.
3 Respect the independence of the new employee knowing they are fully qualified to perfrom tasks related to dental technology.
4 Ask them a few questions to better understand the abilities and limitations of the new technologist and provide any needed guidance.

Please make a selection

The correct answer is:

4 Ask them a few questions to better understand the abilities and limitations of the new technologist and provide any needed guidance.

An alginate impression is received by a lab to fabricate a maxillary Hawley retainer. Which of the highlighted areas of this impression will present the most significant problem in fabricating this appliance?

Question 48 of 75

63%

1 1
2 2
3 3
4 4

Please make a selection

The correct answer is:

3 3

An RDT receives a crown for custom shading and the colour yellow is very prominent. Which complementary colour should be added to reduce the yellow?

Question 49 of 75

64%

1 Grey
2 Blue
3 Purple
4 Orange

Please make a selection

The correct answer is:

3 Purple

How many classifications of malocclusion are there according to Angle’s Classification?

Question 50 of 75

65%

1 2
2 3
3 4
4 5

Please make a selection

The correct answer is:

2 3

An RDT opens a package of surface disinfectant that they are unfamiliar with. Upon inspecting the manufacturer’s recommendation, what is the appropriate amount of waiting time for proper disinfection for most pathogens? Refer to the image.

Question 51 of 75

67%

1 1 minute
2 2 minutes
3 3 minutes
4 5 minutes

Please make a selection

The correct answer is:

3 3 minutes

The dentist is sending casts from a patient with mixed dentition asking for a removable appliance to prevent thumb sucking. The RDT notices that the permanent molars are not fully erupted and there will not be enough retention. What is the most appropriate advice that can be communicated to the dentist?

Question 52 of 75

68%

1 Suggest making a fixed habit breaker.
2 Suggest making a fixed spring retainer.
3 Suggest making a fixed Hawley retainer.
4 Suggest making a fixed band loop space maintainer.

Please make a selection

The correct answer is:

1 Suggest making a fixed habit breaker.

Which of the following is the best practice in regards to managing the Material Safety Data Sheets that come with hazardous materials?

Question 53 of 75

69%

1 File the sheets in a binder, inform employees where it is kept and lock it in a safe place accessible with a key.
2 File the sheets in a binder marked WHMIS, inform employees where it is kept and make it readily accessible.
3 Give the copies to employees and have them file the sheets in their binders so they are safe and readily accessible.
4 File the sheets in a binder marked Emergencies and keep it where it is readily accessible to emergency personnel.

Please make a selection

The correct answer is:

2 File the sheets in a binder marked WHMIS, inform employees where it is kept and make it readily accessible.

When layering ceramic on zirconia, what must be done to ensure the strength in the final prosthesis?

Question 54 of 75

71%

1 The porcelain must be more translucent than the zirconia.
2 The coefficient of thermal expansion must be less than the zirconia.
3 The ceramic must be heat resistant to prevent slumping in the sintering process.
4 The zirconia must be prepared with jagged edges facially to resist shearing forces.

Please make a selection

The correct answer is:

2 The coefficient of thermal expansion must be less than the zirconia.

Which steps listed help ensure the most aesthetically pleasing result for a custom shade appointment for a patient’s 1.1? Select all that apply.

Question 55 of 75

72%

1 Taking pictures with correct lighting.
2 Recording shades of the cervical, middle, and incisal thirds.
3 Performing an x-ray to ensure for adequate bone in the desired area.
4 Full body picture to match the desired tooth shape to the patient's overall figure.
5 Over estimate the value slightly as patients enjoy a brighter fixed restoration compared to their natrual teeth.

Please make a selection

The correct answer is:

1 Taking pictures with correct lighting.
2 Recording shades of the cervical, middle, and incisal thirds.

During deflasking a heat cure acrylic full denture, the technician notices that the acrylic is full of porosity. Which of the following actions could have caused this to happen? Select all that apply.

Question 56 of 75

73%

1 Curing the acrylic resin too quickly.
2 Packing the acrylic before it is ready.
3 An improper liquid-to-powder ratio is used.
4 Deflasking is done in a hurry while the flask is still hot.

Please make a selection

The correct answer is:

1 Curing the acrylic resin too quickly.
2 Packing the acrylic before it is ready.
3 An improper liquid-to-powder ratio is used.

A broken band and loop space maintainer (BLSM) came back from a dentist for repair. The band is crushed and the loop is severely distorted. What would be the most appropriate action for an RDT to take in this situation?

Question 57 of 75

75%

1 Proceed with the repair, using a new band and re-using the old loop.
2 Proceed with the repair, save the old band, and bending a new loop.
3 Advise the dentist the broken BLSM cannot be repaired. A new one is recommended.
4 Advise the patient a new design of the appliance would be most appropriate for the situation.

Please make a selection

The correct answer is:

3 Advise the dentist the broken BLSM cannot be repaired. A new one is recommended.

What steps are taken to reduce the risk of harm to the operator using a non-recycling sand blaster? Select all that apply.

Question 58 of 75

76%

1 Wear safety glasses, gloves and mask.
2 Make sure the cabinet lid is closed tightly before using it.
3 Make sure all lids are screwed on properly after refilling the jars.
4 Before refilling the blasting jars make sure the compressor is turned off.

Please make a selection

The correct answer is:

1 Wear safety glasses, gloves and mask.
2 Make sure the cabinet lid is closed tightly before using it.
3 Make sure all lids are screwed on properly after refilling the jars.

For complete denture construction, which of the following outcomes explains why custom trays are recommended when using polyvinyl siloxane rubber base impression materials for the final impression?

Question 59 of 75

77%

1 They facilitate removal of the impression.
2 They eliminate the need for a tray adhesive.
3 They result in a uniform thickness of material.
4 They allow for more uniform setting of the material.

Please make a selection

The correct answer is:

3 They result in a uniform thickness of material.

A case is received for a CPUD framework including tooth 1.1. When reviewing the Rx and models, the RDT discovers that the incisal of 4.1 is very close to the palatal tissue lingual to 1.1, with a deep overbite and little overjet. There is not sufficient space for the framework design requested. Which of the following recommendations to the clinician is most appropriate in this case?

Question 60 of 75

79%

1 Fabricate the CPUD, modifying as needed.
2 Fabricate an acrylic maxillary partial.
3 Fabricate a high lingual CPUD.
4 Fabricate a 3-unit bridge.

Please make a selection

The correct answer is:

3 Fabricate a high lingual CPUD.

Which of the following terms represents the process of immersing crowns into an acid bath to remove surface oxides?

Question 61 of 75

80%

1 Spruing
2 Pickling
3 Divesting
4 Oxidization

Please make a selection

The correct answer is:

2 Pickling

What is the term used to describe the path in which a removable partial denture is placed?

Question 62 of 75

81%

1 Occlusal path
2 Selected path
3 Path of insertion
4 Path of retention

Please make a selection

The correct answer is:

3 Path of insertion

What is the classification of an inlay that restores the occlusal surfaces and one or both of the proximal surfaces?

Question 63 of 75

83%

1 Class II
2 Class III
3 Class IV
4 Class VI

Please make a selection

The correct answer is:

1 Class II

A patient requires the extraction of all their remaining natural teeth. What would be the best type of denture to fabricate for such a patient?

Question 64 of 75

84%

1 An immediate denture
2 A conventional denture
3 An implant supported denture
4 A conventional denture with lingualized occlusion

Please make a selection

The correct answer is:

1 An immediate denture

Which of the following locations should the mandibular molar teeth be placed to improve denture stability?

Question 65 of 75

85%

1 Lingual to the crest of the mandibular ridge
2 Buccal to the crest of the mandibular ridge
3 Over the crest of the mandibular ridge
4 Over the buccal shelf area

Please make a selection

The correct answer is:

3 Over the crest of the mandibular ridge

While inspecting a finished Band and Loop Space Maintainer ready for delivery, the RDT notices one of the solder joints is exposed and the wire is not fully encased in solder. What is the most appropriate action to take?

Question 66 of 75

87%

1 One of the two solder joints ensures sufficient strength. The appliance can be shipped to the dentist as is.
2 Re-solder the exposed joint by applying new flux, new solder and re-polish.
3 Apply a layer of crazy glue on the exposed wire for added strength.
4 Tack weld the exposed wire before shipping to the dentist.

Please make a selection

The correct answer is:

2 Re-solder the exposed joint by applying new flux, new solder and re-polish.

An Rx for a Mandibular Cast Partial requests the following characteristics:

• A lingual bar
• Double C-Clasp to #37 & #38
• Rest seat on #46 distal with C-Clasp
• Rest seat #48 mesial with C-Clasp

Which of the areas on the cast shown below conflict with the requested partial design?
Select all areas from the image that apply.

Question 67 of 75

88%

1 1
2 2
3 3
4 4
5 5
6 6

Please make a selection

The correct answer is:

2 2
4 4

Which of the following requirements applies to fabricating a record base or baseplate to a master cast?

Question 68 of 75

89%

1 It must be slightly underextended.
2 It must be flexible to reduce trauma to the mucosa.
3 It must fit the cast loosely to avoid distorting the cast.
4 It must adapt to the cast with borders simulating the final denture.

Please make a selection

The correct answer is:

4 It must adapt to the cast with borders simulating the final denture.

A propane/air multi-orafice torch flame shows a pale flame with feathery inner cone and a strong hissing sound. Which statement best characterizes this flame?

Question 69 of 75

91%

1 The flame is correctly adjusted.
2 The flame has too much air for the available propane.
3 The flame has too much propane for the available air.
4 The air and gas are both too high; the pressure of both should be reduced.

Please make a selection

The correct answer is:

2 The flame has too much air for the available propane.

What documentation should be included when invoicing a prosthesis? Select all that apply.

Question 70 of 75

92%

1 Date of service
2 Patient's name or ID number
3 RDT'S full name, registration number and home address
4 Implant parts information with serial numbers and/or product identification certificates

Please make a selection

The correct answer is:

1 Date of service
2 Patient's name or ID number
4 Implant parts information with serial numbers and/or product identification certificates

Which component is used to link the implant fixture to the final dental prosthesis?

Question 71 of 75

93%

1 Implant impression coping
2 Implant direction indicator
3 Implant cover screw
4 Implant abutment

Please make a selection

The correct answer is:

4 Implant abutment

A Muslim employee arrives at work wearing a Hijab. Given that her job involves trimming cast partial dental frameworks, which of the following actions would be most appropriate for the supervising RDT to take?

Question 72 of 75

95%

1 Ask her why she is wearing a scarf.
2 Ask her to remove the Hijab while she is trimming.
3 Inform her you don’t allow religious symbols in your laboratory.
4 Ensure the employee tucks in any loose ends securely under a lab coat.

Please make a selection

The correct answer is:

4 Ensure the employee tucks in any loose ends securely under a lab coat.

What is the best indication that the entire RPD cast framework is fully seated in place?

Question 73 of 75

96%

1 All rests are fully seated.
2 Clasp arms have slight retention.
3 Occlusal vertical dimension has been restored.
4 There are no open spaces at the margin preparation.

Please make a selection

The correct answer is:

1 All rests are fully seated.

What term describes the junction of the metal and the acrylic on a RPD?

Question 74 of 75

97%

1 Relief line
2 Finish line
3 Survey line
4 Fulcrum line

Please make a selection

The correct answer is:

2 Finish line

What is the best choice of hydrophilic impression material for crown and bridge, providing a distortion-free mould with a 6 hour delay before pouring?

Question 75 of 75

99%

1 Polyether
2 Polysulfide polymer
3 Reversible hydrocolloid
4 Irreversible hydrocolloid

Please make a selection

The correct answer is:

1 Polyether