Dental Instruments and Tray Setup Practice Questions
20 free Dental Instruments and Tray Setup practice questions for the CDA. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which instrument is used to examine the teeth and oral cavity during an initial assessment?
- A Cotton pliers
- B Mouth mirror
- C Periodontal probe
- D Explorer
Correct answer: Mouth mirror
The mouth mirror allows indirect vision, retraction, and illumination. It is one of the first instruments used during an examination.
Which instrument is used to detect caries, calculus, and other surface irregularities?
- A Explorer
- B Scaler
- C Bone file
- D Articulating paper holder
Correct answer: Explorer
Explorers have sharp tips that help detect changes in tooth texture. They are essential for identifying demineralization and cavity margins.
Periodontal probes are primarily used to:
- A Remove plaque and calculus deposits
- B Measure sulcus or pocket depth
- C Polish exposed tooth surfaces
- D Retract adjacent soft tissue
Correct answer: Measure sulcus or pocket depth
Probes measure the depth of periodontal pockets to assess gum health. Accurate measurement is critical for diagnosing periodontal disease.
Which instrument is part of the basic examination tray setup?
- A Cryer elevator
- B Cotton pliers
- C Amalgam carrier
- D Bone chisel
Correct answer: Cotton pliers
Cotton pliers are used to handle cotton products and small items in the mouth. They are standard in every examination tray.
Which instrument is used to pack restorative material into a cavity preparation?
- A Burnisher
- B Condenser
- C Hollenback carver
- D Amalgam well
Correct answer: Condenser
Condensers compress and pack restorative materials such as amalgam. Good condensation helps ensure strength and proper adaptation.
A burnisher is used to:
- A Remove excess composite material
- B Carve detailed occlusal anatomy
- C Smooth restoration surfaces
- D Mix two-paste dental cement
Correct answer: Smooth restoration surfaces
Burnishers smooth and shape restorative materials after placement. This improves marginal adaptation and surface finish.
Which carver is commonly used to carve occlusal anatomy in amalgam restorations?
- A Hollenback carver
- B Cleoid-discoid carver
- C Ward's carver
- D Interproximal file
Correct answer: Cleoid-discoid carver
The cleoid-discoid carver is shaped for sculpting pits and fissures. It is widely used for occlusal surfaces.
What is the function of the amalgam carrier?
- A To carve amalgam anatomy
- B To store dental materials
- C To place amalgam in a cavity
- D To polish amalgam surfaces
Correct answer: To place amalgam in a cavity
The amalgam carrier transports mixed amalgam from the well to the cavity. It improves efficiency and prevents contamination.
Which instrument is specifically used for removing supragingival calculus?
- A Curette
- B Sickle scaler
- C Periodontal file
- D Chisel scaler
Correct answer: Sickle scaler
Sickle scalers have sharp, pointed tips designed for removing calculus above the gumline. They are essential in prophylaxis.
Which instrument is used to remove subgingival calculus and smooth the root surface?
- A Scaler
- B Curette
- C Hoe
- D Gingivectomy knife
Correct answer: Curette
Curettes have rounded tips and are safe for subgingival use. They remove calculus and perform root planing.
Which instrument holds the cheek away from the operative field during procedures?
- A Explorer
- B Mirror
- C Cheek retractor
- D Cotton pliers
Correct answer: Cheek retractor
Cheek retractors hold soft tissues away from the operative field. They improve visibility and access during dental treatment.
What is the purpose of the articulating paper holder?
- A To measure periodontal pocket depth
- B To mark occlusal contact points
- C To mix restorative cement
- D To carve amalgam restorations
Correct answer: To mark occlusal contact points
Articulating paper identifies high points in occlusion. The holder ensures accurate placement without contaminating the paper.
Which item should always be included in a basic diagnostic tray setup?
- A Scaler
- B Anesthetic syringe
- C Explorer
- D Crown remover
Correct answer: Explorer
The explorer is essential for detecting caries and irregularities. It is a standard examination instrument.
Which instrument is used to insert cotton pellets into the cavity preparation?
- A Amalgam carrier
- B Cotton pliers
- C Condenser
- D Burnisher
Correct answer: Cotton pliers
Cotton pliers pick up and place cotton pellets, isolating or drying the operative site. They maintain cleanliness and precision.
A spoon excavator is used to:
- A Polish restorations
- B Remove soft carious dentin
- C Place matrix bands
- D Detect occlusal contacts
Correct answer: Remove soft carious dentin
Spoon excavators remove decayed dentin that is soft or infected. They are crucial in cavity preparation after initial cutting.
Which instrument stabilizes the matrix band during restorative procedures?
- A Tofflemire retainer
- B Amalgam carrier
- C Cleoid-discoid
- D Burnisher
Correct answer: Tofflemire retainer
The Tofflemire retainer holds the matrix band securely around the tooth. It creates a temporary wall for restoring proximal surfaces.
Which item is typically placed on the tray for local anesthesia administration?
- A Matrix retainer
- B Anesthetic syringe
- C High-speed handpiece
- D Gingival retraction cord
Correct answer: Anesthetic syringe
The anesthetic syringe is needed to administer local anesthesia before procedures. It ensures patient comfort and pain control.
Which dental instrument is used to shape and contour composite resin?
- A Plastic filling instrument
- B Cleoid-discoid carver
- C Bone chisel
- D Sickle scaler
Correct answer: Plastic filling instrument
Plastic filling instruments are designed to manipulate and contour composite. Their smooth surfaces prevent sticking.
Which tool is used to remove temporary crowns or bridges?
- A Periosteal elevator
- B Crown remover
- C Periodontal curette
- D Dental explorer
Correct answer: Crown remover
Crown removers safely detach temporary restorations without damaging the tooth structure. They apply controlled force.
Which handpiece operates at high speed for cutting enamel and dentin?
- A Slow-speed handpiece
- B High-speed handpiece
- C Surgical straight handpiece
- D Prophy angle
Correct answer: High-speed handpiece
High-speed handpieces operate at very high RPMs for cutting enamel and shaping tooth structure. They are essential for cavity preparation.