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



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DANB's Maryland Orthodontic Assisting Expanded Functions - Reviews


   Excellent
Based on 125 reviews

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"I found the practice tests extremely helpful. I passed the DANB RHS exam and felt that the subject matter was thoroughly covered by your practice tests. The viewing of films and answering questions on them was especially helpful. Thank you very much for the assistance in preparing for the DANB RHS exam."

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See why our users from 154 countries love us for their exam prep! Including 125 reviews for the DANB's MDO exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

   Excellent -- Based on 125 reviews

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

A problem with heat-curing acrylic resin is the heat:

Correct Answer:
distorts the fine spring components of the appliances.


when dealing with heat-curing acrylic resins, particularly in the manufacturing of dental appliances, a notable issue arises due to the application of heat during the curing process. one of the primary problems associated with this is the distortion of fine spring components that are often integral to the function of these appliances.

the use of heat-curing acrylic resin can negatively impact the dimensional stability and structural integrity of these components. springs and other delicate parts are designed to operate within precise tolerances. when exposed to the high temperatures required for curing the acrylic resin, these metal components can expand or warp, leading to malfunctions or a complete failure of the appliance to operate as intended.

this distortion occurs because different materials (metal for the springs and acrylic for the baseplates) have different coefficients of thermal expansion. this means they expand at different rates when heated, which can lead to misalignment or unwanted stresses within the structure of the appliance.

as a result of these challenges, many manufacturers have shifted towards using self-curing resins instead. these resins do not require the same level of heat to cure, thereby reducing the risk of thermal distortion to the metal components. self-curing resins harden at room temperature or with minimal external heat, which helps in maintaining the integrity and precision of the entire appliance structure.

in summary, while heat-curing acrylic resins were commonly used in the past due to their durability and economic benefits, the move towards self-curing resins represents a technological adaptation aimed at improving the quality and reliability of dental appliances by preventing the distortion of critical components such as fine springs. this shift highlights the importance of material properties and their interactions in the design and manufacturing of complex devices.