M4 Quiz #4 - DH Dental Anatomy/Tooth Morphology (DHYG1430-Concorde)

An 8 year old child has how many teeth in their mouth (primary and permanent)?

24

In the normal dentition, humans have how many non-succedaneous teeth?

12

During what age span are primary teeth in the process of erupting (emerging) into the mouth, known as primary dentition?

6 months to 2 years

Primary molars differ from permanent molars in that primary molars have:

Greater divergence of roots

Which primary tooth does not resemble any permanent tooth?

Mandibular first molar

The permanent mandibular central incisors erupt at age:

6 to 7 years

Using the Universal number or letter, which tooth erupts just distal to primary tooth J?

Tooth #14 maxillary left permanent first molar

A person has four mandibular incisor crowns, but one of them appears twice as wide as the others. On the radiographs this double-wide crown appears to share one root with one canal. What is this condition called?

Gemination or twinning

A person appears to have four mandibular incisor crowns, but two of the crowns are joined together. The roots of this double-wide crown appear separate with separate root canals. What is this condition?

Fusion

Congenital syphilis may cause which of the following dental malformations? (Read all choices before answering.)

Hutchinson's incisors and mulberry molars

By definition, what term describes a tooth when its mesial surface is facing toward the facial?

Tooth rotation

The breaking off of enamel rods near the cementoenamel junction due to heavy occlusal forces is most appropriately called:

Abfraction

When examining a large group of people, which two teeth are most likely to be congenitally missing? (The Universal numbering system is used.)

#1 or 16

Three adjacent molars in the mouth of a 40-year-old person are lined up but the occlusal surface of the second molar is much shorter than that of the adjacent first or third molars. Radiographs indicate the absence of a periodontal ligament space around the second molar. This condition is called:

Ankylosis

It might be difficult for a dentist to extract a tooth exhibiting dilaceration. What is dilaceration?

A severely bent root

What term can be used to describe the condition where no teeth form within the jaws?

Total anodontia

Enamel discoloration or pitting may be caused by which of the following? (Read all choices before answering.)

All of these choices are correct.Correct answer

- Enamel dysplasia

- Excess fluoride in the diet

- High fever

- Local infection

Which dental malformation appears as small, round enamel growths located on the root furcations of molars?

Enamel pearls

When examining a large group of people, what is the most frequent location where extra (supernumerary) permanent teeth may be found?

Maxillary incisor area