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DANB's MDO (MDG) Practice Tests & Test Prep by Exam Edge - Free Test


Our free DANB's Maryland Orthodontic Assisting Expanded Functions (MDG) Practice Test was created by experienced educators who designed them to align with the official Dental Assisting National Board content guidelines. They were built to accurately mirror the real exam's structure, coverage of topics, difficulty, and types of questions.

Upon completing your free practice test, it will be instantly reviewed to give you an idea of your score and potential performance on the actual test. Carefully study your feedback to each question to assess whether your responses were correct or incorrect. This is an effective way to highlight your strengths and weaknesses across different content areas, guiding you on where to concentrate your study efforts for improvement on future tests. Our detailed explanations will provide the information you need to enhance your understanding of the exam content and help you build your knowledge base leading you to better test results.

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DANB's Maryland Orthodontic Assisting Expanded Functions - Free Test Sample Questions

The autoclave sterilizes instruments through the use of:





Correct Answer:
steam under pressure.
the autoclave sterilizes instruments predominantly through the use of steam under pressure. this method is highly effective in eliminating all viable microorganisms, including resistant spores, thus ensuring the sterility of the instruments used in medical, dental, and laboratory settings.

the principle behind an autoclave’s operation involves the application of steam, which is heated to a high temperature and then pressurized. this combination of heat and pressure is what makes steam sterilization so effective. under normal atmospheric pressure, water boils at 100°c (212°f). however, when pressure is increased inside an autoclave, the boiling point of water also increases. this allows the steam to reach temperatures higher than 100°c, typically between 121°c (250°f) and 134°c (273°f).

at these elevated temperatures and pressures, the steam is able to penetrate microorganisms’ cellular walls, corrupting their structural integrity and leading to their destruction. additionally, the heat causes the enzymes and proteins within the microorganisms to denature, effectively rendering them inactive and unable to reproduce. the high pressure helps to ensure that the steam comes into contact with all surfaces of the instruments, including small crevices and hollow spaces, which might not be effectively sterilized by other means.

autoclaves are preferred over other sterilization methods, such as dry heat or chemicals, because steam is more efficient at transferring heat than dry air, requiring lower temperatures and shorter exposure times to achieve sterilization. chemical sterilizers, while useful in certain scenarios, can leave a toxic residue and may not be suitable for all types of materials. furthermore, steam is non-toxic and readily available, making it a cost-effective and environmentally friendly option for sterilization.

in conclusion, the autoclave’s use of steam under pressure for sterilization is fundamental in healthcare and scientific research to ensure that all tools and instruments are free from harmful microorganisms, thus preventing infection and maintaining a high standard of hygiene and safety.

Prior to a patient having bridgework or crowns, orthodontic treatment can perform which function?





Correct Answer:
align tipped or tilted teeth.


orthodontic treatment is often a preparatory step before undergoing more complex dental procedures such as the placement of crowns or bridges. one of the primary functions of orthodontic treatment in this context is to align tipped or tilted teeth. when teeth are not properly aligned, they can create issues not only in aesthetics but also in function. misaligned teeth can lead to an improper bite, which may cause difficulty in chewing, uneven wear on teeth, and strain on jaw muscles and joints.

by realigning tipped or tilted teeth, orthodontics helps in establishing a more stable and functional foundation for future restorative work. when teeth are correctly aligned, crowns and bridges can be more effectively designed and fitted. this precise fit is crucial for the longevity and effectiveness of these restorations. proper alignment ensures that the forces exerted during biting and chewing are distributed evenly across the teeth, reducing the risk of damage to the restorative work and the natural teeth adjacent to it.

moreover, when teeth are aligned properly before placing crowns or bridges, it enhances the overall aesthetic outcome. crowns and bridges are designed to mimic the look of natural teeth, but if these restorations are placed on misaligned teeth, they might not achieve the desired appearance. orthodontic treatment can correct the orientation of the teeth so that the restorative work blends seamlessly with the surrounding teeth, maintaining or improving the patient's smile.

in summary, orthodontic treatment prior to the placement of crowns and bridges serves a critical role. it not only ensures that the teeth function properly but also that they look appealing post-restoration. this preparatory step is essential in achieving long-term success and satisfaction with dental restorative procedures.