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DHA Orthodontic Assistant (DHA-OA) Practice Tests & Test Prep - Topics


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Understanding what is on the DHA Orthodontic Assistant 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 studing the correct information.

  • Directs your study efforts toward the most relevant areas.
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  • 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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DHA Orthodontic Assistant Exam Blueprint

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

DHA Orthodontic Assistant Exam Blueprint
Domain Name % Number of
Questions
ICE - Infection Control
     Patient and dental healthcare worker education 10% 5
     Prevent cross-contamination and disease transmission 20% 10
     Maintain aseptic conditions 10% 5
     Perform sterilization procedures 15% 7
     Environmental asepsis 15% 7
     Occupational safety 30% 14
OA - Orthodontic Assisting
     Collection And Recording Of Clinical Data 15% 7
     Orthodontic Procedures 36% 17
     Chairside Dental Materials 37% 18
     Laboratory Materials And Procedures 5% 2
     Oral Health Management Prevention And Management Of Emergencies 5% 2
     Office Operations 5% 2
     Radiation Health And Safety 5% 2

DHA Orthodontic Assistant - Exam Topics Sample Questions

Once an overjet has been reduced, sometimes there are spaces left between the teeth, which require:

Correct Answer:
space closure.


when an orthodontic treatment effectively reduces an overjet, which is the horizontal projection of upper teeth over the lower teeth, it can occasionally result in undesirable spaces or gaps between the teeth. addressing these gaps is crucial for achieving optimal alignment and aesthetic appearance. the standard procedure to manage these gaps is known as space closure.

space closure is a critical phase in orthodontic treatment aimed at eliminating any gaps that remain after initial corrections such as overjet reduction. this process ensures that the teeth are not only aligned but also evenly spaced, contributing to both functional and visual harmony of the dental arches.

to achieve space closure, orthodontists employ various auxiliary attachments that can be added to the existing fixed orthodontic appliances (commonly known as braces). these attachments enhance the appliance's ability to pull or push teeth into the desired positions, thus closing gaps effectively. some common auxiliary attachments used in space closure include: 1. **active tie-backs**: these are small wires used to exert additional force on the brackets of braces, helping to pull teeth together. 2. **nickel titanium closed coil springs**: these springs are known for their consistent force and are effective in closing spaces by pushing adjacent teeth towards each other. 3. **elastomeric chains**: these are stretchable chains that provide a continuous force over a group of teeth, useful in closing spaces uniformly. 4. **elastics**: rubber bands or elastics are often used to apply pressure in specific directions, aiding in aligning and closing gaps between teeth.

each type of auxiliary attachment has its specific function and suitability depending on the individual's orthodontic needs and the nature of the spaces to be closed. the choice of which attachment or combination to use is determined by the orthodontist based on factors such as the size of the gap, position of the teeth, and overall treatment goals.

in conclusion, space closure is a fundamental aspect of orthodontic treatment following the reduction of an overjet. utilizing various auxiliary attachments allows orthodontists to customize the treatment, ensuring effective results that lead to a well-aligned and aesthetically pleasing dental arrangement. this not only enhances the smile but also promotes better dental health by aligning teeth correctly, facilitating easier cleaning and maintenance.

Why are standard precautions not sufficient enough to protect the DHCP while treating a patient with active TB?

Correct Answer:
ppe, such as surgical masks, do not prevent inhalation of the tb organism.


standard precautions in healthcare settings are designed to protect healthcare professionals and patients from the transmission of infections that are spread by contact, droplet, and airborne routes. these precautions typically include the use of personal protective equipment (ppe) such as gloves, gowns, and surgical masks. however, when treating a patient with active tuberculosis (tb), these measures are not entirely sufficient due to the specific nature of the transmission of the tb bacteria.

tuberculosis is caused by the bacterium mycobacterium tuberculosis. it is predominantly a respiratory pathogen that is spread through the air when an infected person coughs, sneezes, speaks, or sings. the bacteria are released into the air in tiny droplets and can be inhaled by another person. once inhaled, the bacteria can settle in the lungs and begin to multiply, potentially leading to active tb disease.

the standard surgical masks commonly used as part of ppe in healthcare settings do not provide complete protection against inhaling airborne pathogens like the tb bacterium. these masks are designed to block large droplets and splashes but are not effective at filtering very small airborne particles such as the droplet nuclei that tb bacteria can be part of. for adequate protection against tb, respirators such as n95 or higher-level respirators, which are capable of filtering out these smaller particles, are required.

consequently, when a dhcp (dental healthcare personnel) treats a patient known to have active tb, relying solely on standard precautions including surgical masks is not adequate. the risk of inhaling tb bacteria and developing a tb infection remains significant. this inadequacy necessitates the implementation of additional infection control measures specifically aimed at airborne diseases, known as airborne precautions.

airborne precautions include the use of n95 respirators for dhcp, placing the patient in an airborne infection isolation room (if available), and improving the air ventilation in treatment areas. further, it is advised to minimize the number of staff and patients exposed to the infected individual and to defer treatment of other patients until it is confirmed that the tb patient is no longer infectious.

in summary, while standard precautions are critical for preventing a wide range of infections, the unique characteristics of tb transmission require specific measures beyond these standards to ensure the safety of both dhcp and other patients. this highlights the need for healthcare settings to be equipped and prepared to escalate precautions based on the specific infectious risks posed by individual patients.