Advanced Dental Admission Test (ADAT)

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Prepare for the Advanced Dental Admission Test. Study with flashcards and multiple choice questions, with hints and explanations provided for each question. Strengthen your readiness for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the maximum opening of the mouth during translation?

20-30 mm
30-40 mm
40-60 mm
60-80 mm

The correct answer is: 40-60 mm

The maximum opening of the mouth during translation is typically within the range of 40-60 mm. Translation in this context refers to the movement of the mandible from its resting position, which involves a combination of rotation and sliding motion of the condyles in the temporomandibular joint (TMJ). During this movement, the functional range of motion allows for significant opening of the mouth as the condyles move forward and downward in the glenoid fossae. The 40-60 mm range is supported by clinical observations and anatomical studies, which indicate that an average adult can achieve this extent of opening without discomfort or pathology in a healthy TMJ. Furthermore, maximum mouth opening is influenced by factors such as individual anatomical variations, muscular flexibility, and the presence of any dental or jaw discrepancies. The values provided in other ranges, while potentially applicable in certain contexts, do not accurately represent the typical maximum translated opening of the mouth for most individuals. This is why the chosen answer aligns with established dental and anatomical standards regarding normal jaw function.