DANB Impressions Examination Practice Test
Impression procedures capture the contours of teeth and oral tissues for restorative and other dental laboratory work. This practice material touches on selecting and preparing trays, managing impression materials, protecting patient comfort, and preserving the impression during handling and transfer. It also includes questions about digital scans and the purpose of an opposing-arch record.
Exam overview
About the DANB Impressions Examination Exam
Dental assistants supporting impression procedures need to match tray size and design to the arch, prepare materials according to their handling requirements, and position the tray to capture the intended anatomy. Practical decisions include recognizing when a patient’s allergy affects material choice, managing a removable appliance during the procedure, and using appropriate infection-control steps before laboratory transfer. Impression quality depends on careful removal and handling; distortion or damage can compromise the record used for a restoration. Related concepts include reversible hydrocolloid temperature control, custom-tray polymerization, and tray stops that help control seating. An opposing-arch impression or scan records the teeth that meet the restored teeth, helping the dental team assess occlusion. These skills connect material handling and patient safety with the accuracy and usefulness of the final clinical record.
Sample Practice Questions
Review a selection from this exam's published US Practice Tests practice bank.
Before taking an impression, a patient reports a severe latex allergy. What should the dental assistant do?
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Correct answer: BA severe latex allergy requires avoiding latex exposure, including gloves and other items that may contact the patient. Verify relevant products and use appropriate latex-free alternatives.
Which action best helps prevent cross-contamination when an impression is transferred from the operatory to the laboratory?
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Correct answer: BAn impression should be cleaned and disinfected using the appropriate procedure, then contained during transport. Clear identification also helps ensure it reaches the correct case.
When recording an opposing arch for a restorative case, what is the general purpose of that impression or scan?
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Correct answer: AAn opposing-arch record provides information about the teeth that will meet the restoration. It contributes to laboratory planning, though other records may also be needed depending on the case.
Why should an impression be handled carefully after it has been made, even if it appears intact?
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Correct answer: ADeformation during handling can change the recorded anatomy and compromise the accuracy of a cast or appliance. Impressions should be supported and transported in a way appropriate for the material.
A patient has a removable dental appliance that must be removed before an impression procedure. What should the assistant do with it during the procedure?
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Correct answer: BA labeled, suitable container helps protect the appliance from loss, damage, and contamination while it is out of the mouth. Follow office protocol for handling and cleaning it.
A dental assistant is preparing to disinfect an impression before it is sent to a dental laboratory. Which principle should guide the process?
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Correct answer: BDisinfection must be effective while preserving the impression. Follow the material and disinfectant instructions, including compatibility, method, and required contact time.
A dental assistant is preparing a reversible hydrocolloid impression. Which equipment is essential for keeping the material at its required temperature during use?
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Correct answer: BReversible hydrocolloid (agar) requires controlled heating to liquefy it and tempering before placement. A conditioning unit provides the temperature stages needed for handling and setting.
How to use this practice test
Access is free. A session draws up to 20 random questions from the 50-question practice bank and displays results afterward. Use missed items to identify whether you need to revisit tray selection, material handling, patient safety, disinfection, or the purpose of a particular impression record.
Preparation tips
- Compare stock trays with the arch before loading material; check that the tray can cover the intended teeth and tissues without impinging on them.
- For material-preparation questions, distinguish temperature-sensitive reversible hydrocolloid from materials that require other handling steps.
- Trace the impression’s path from the patient to the laboratory, identifying where careful handling and appropriate disinfection help protect the record and prevent cross-contamination.
- Practice explaining the clinical purpose of an opposing-arch record and how damage or distortion could affect its use in restorative planning.
- Review how tray stops and complete polymerization contribute to controlled seating and readiness of a custom tray.