Exam 5: Development, Form, and Eruption

Third molar roots continue to calcify until about 25 years of age.

Calcification of all deciduous teeth begins near the end of the sixth month in utero.

A developmental groove separates one cusp from another.

Roots of primary teeth resorb and dissolve because odontoblasts destroy the surrounding bone.

It is unusual for a 3-year-old child to have all twenty primary teeth because second molars do not typically erupt until 4 years of age.

The rounded protuberances on the incisal edge of a newly erupted incisor are called

Edentulous refers to

Which of the following selections include teeth that should be present in the dentition of a 3-year-old child (select all that apply)?

The crypt will become the tooth socket.

Small clumps of cells that will later form teeth are called

Which of the following selections include teeth that should have erupted or may be in the process of eruption in the dentition of an 8-year-old child (select all that apply)?

A tooth with two cusps, such as a maxillary premolar, was formed from two lobes.

A 15-month-old toddler would generally have (select all that apply):

An impacted tooth is one that has

Which is the last permanent incisor to erupt?

A 6-year-old has a space maintainer on the area of the deciduous mandibular left first molar. Which permanent tooth will erupt in the space?

Maxillary molars have three major buccal cusps because the third buccal cusp develops from the lobe of Carabelli.

Bicuspid is not an accurate name for premolars. Premolars can have two, three, or four cusps.

Another name for the wearing away of the tooth through contact with an opposing tooth is

Which choice best indicates the years of eruption for all of the premolars?