National Dental Examining Board of Canada (NDEB) Practice Exam

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Master your National Dental Examining Board of Canada (NDEB) exams with our comprehensive practice guide. Achieve excellence in your dental certification with expertly crafted questions and detailed explanations.

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A 10-year-old has retention of primary teeth and presence of many unerupted supernumerary teeth, what is this condition?

Cleidocranial dysplasia
Dental fluorosis
Amelogenesis imperfecta
Ectodermal dysplasia

The correct answer is: Cleidocranial dysplasia

This condition is known as cleidocranial dysplasia. This condition is characterized by delayed loss of primary teeth and excessive formation of supernumerary teeth that do not erupt. Dental fluorosis and amelogenesis imperfecta are both conditions that affect tooth formation, but they do not involve excessive formation of supernumerary teeth. Ectodermal dysplasia is a genetic condition that causes abnormalities in multiple structures, including the teeth, but it does not specifically involve delayed loss of primary teeth or supernumerary teeth.