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DANB's IM (IM) Practice Tests & Test Prep by Exam Edge - Topics

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Understanding what is on the DANB's IM exam is crucial step in preparing for the exam. You will need to have an understanding of the testing domain (topics covered) to be sure you are studying the correct information.

  • Directs your study efforts toward the most relevant areas.
  • Ensures efficient and adequate preparation.
  • Helps identify strengths and weaknesses.
  • Allows for a focused approach to address gaps in understanding.
  • Aligns your preparation with the exam's expectations.
  • Increases the likelihood of success.
  • Keeps you informed about your field's current demands and standards.
There is no doubt that this is a strategic step in achieving certification and advancing your career.

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Understanding the exact breakdown of the DANB's Impressions test will help you know what to expect and how to most effectively prepare. The DANB's Impressions has multiple-choice questions The exam will be broken down into the sections below:

DANB's Impressions Exam Blueprint
Domain Name % Number of
Purpose of impressions 15% 12
Taking impressions 55% 44
Patient management techniques 10% 8
Bite/occlusal registrations 10% 8
Infection Control/OSHA protocol 10% 8

DANB's Impressions - Exam Topics Sample Questions

Which of the following Best represent the composition of addition silicone impression material?

Correct Answer:
the majority of addition silicone material is hydrophilic

the question "which of the following best represent the composition of addition silicone impression material?" aims to identify the characteristic features of addition silicone, which is commonly used in dental impressions. the correct answer to this question is that "the majority of addition silicone material is hydrophilic."

to understand why this is the correct answer, it is essential to delve into the properties and composition of addition silicone impression materials. addition silicones, also known as vinyl polysiloxanes or polyvinyl siloxanes, are among the most popular materials used for making dental impressions due to their superior accuracy and dimensional stability. these materials are composed primarily of a base paste and a catalyst paste. the base paste typically contains a vinyl-terminated polydimethylsiloxane, while the catalyst paste includes a platinum catalyst that facilitates the addition-curing reaction.

the term "hydrophilic" is key to understanding the nature of these materials in a clinical setting. hydrophilic substances have an affinity for water, which means they can absorb moisture or be wetted easily. this property is particularly beneficial in dentistry because it allows the impression material to effectively record fine details in a moist oral environment. when an impression material is hydrophilic, it reduces the contact angle of water on the surface, allowing the material to flow better over the surfaces of oral tissues and capture the intricate details necessary for creating accurate dental restorations.

most addition silicone impression materials incorporate hydrophilic additives to enhance their performance in the wet environment of the mouth. these hydrophilic additives help overcome the inherently hydrophobic nature of the silicone polymers, thereby improving the wettability of the impression surface. this modification is crucial for achieving precise and detailed impressions, which are foundational for the fabrication of well-fitting dental prostheses and restorations.

therefore, stating that "the majority of addition silicone material is hydrophilic" accurately represents the enhanced composition of these impression materials, designed to perform optimally in the unique conditions of oral tissue surfaces. this characteristic distinguishes them from other materials that may not exhibit such hydrophilic properties and hence might not provide the same level of detail and accuracy in dental impressions.

When handling an alginate impression, what type of equipment is used to remove extra alginate from the impression tray?

Correct Answer:
a laboratory knife
when handling an alginate impression, the type of equipment used to remove extra alginate from the impression tray is a laboratory knife.

alginate is a commonly used dental impression material that captures fine details and is easy to work with. after a patient bites into the alginate-filled tray, it sets to form a mold of their teeth. once the alginate has set and the impression tray is removed from the patient's mouth, there might be excess alginate that has flowed or spread beyond the necessary boundaries on the tray.

to ensure the quality and clarity of the dental impression, it is important to trim and remove this excess material. this is done using a laboratory knife, a tool designed for precise cutting and trimming in laboratory settings, including dental labs. the laboratory knife has a handle and a sharp blade that can carefully cut away the excess alginate without damaging the impression itself.

the laboratory knife provides the accuracy and control needed to perform this task efficiently. other tools, like scissors or generic cutting devices, might not offer the same precision and could potentially harm the integrity of the impression by either pulling on the alginate or not cutting cleanly.

therefore, a laboratory knife is the recommended equipment to use for removing extra alginate from an impression tray. this ensures that the final dental cast made from the impression will be accurate and free of any unwanted alginate artifacts, leading to better patient outcomes in dental treatments and prosthetics.