INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the characteristic of Miller mobility class 2?

normal
slightly more than normal
<1mm
>1mm and can be vertically depressed in socket

The correct answer is: <1mm

Miller Mobility Class 2 indicates that the gingival margin has is mobile, but not more than 1mm when perturbed. Option A is incorrect because normal gingival margin should not be mobile at all. Option B is incorrect because it refers to "slightly more than normal", which is not a defined characteristic for Miller Mobility Class. Option D specifies an extent of >1mm, which is more than the maximum limit for Class 2. Therefore, the correct characteristic for Miller Mobility Class 2 is option C, <1mm.