INBDE (Integrated National Board Dental Examination) Practice Exam

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Interproximal contacts are broader and flatter in which dentition?

Primary
Permanent
Mixed
None of the above

The correct answer is: Primary

Interproximal contacts refer to the space between adjacent teeth, specifically between the proximal surfaces (the sides that face each other) of two teeth. The option "Primary" refers to primary or baby teeth, which are typically wider and take up more space in the mouth compared to permanent teeth. This means that the interproximal contacts in primary dentition are broader and flatter due to the larger size of the teeth. On the other hand, permanent dentition has smaller and narrower teeth, resulting in more narrow and pointed interproximal contacts. The option "Permanent" is therefore incorrect. The option "Mixed" refers to a stage in dental development where a child has both primary and permanent teeth, so this option is also incorrect as it does not specify which dentition the interproximal contacts are referring to. Lastly, the option "None of the above" is incorrect as the correct answer is "Primary".