Exam 5: Development, form, and Eruption

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

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?

Permanent mandibular central incisors are the first succedaneous teeth to erupt.The earliest visible portion of an anterior tooth is the cusp of Carabelli,the name for the lingual lobe of mandibular central incisors.

The crypt will become the tooth socket.

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

An impacted tooth is one that has

Formation of teeth can be affected by nutritional deficiencies,fever,or childhood illnesses.While trauma to the dentition may delay eruption,it does not negatively impact formation of teeth.

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

Exfoliation is the process by which the roots of a deciduous tooth are pushed together by the calcification process.Resorption is the phenomenon where osteoblasts destroy the roots of primary teeth.

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

A developmental groove separates one cusp from another.

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 15-month-old toddler would generally have (Select all that apply. )

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 20 primary teeth because second molars do not typically erupt until 4 years of age.

The first deciduous teeth,the mandibular central incisors,erupt at approximately 6.5 to 7 months.The first permanent teeth,the maxillary premolars,erupt at approximately 6 years of age.

A 10-year-old will generally have the following permanent teeth (Select all that apply. ):

Which is the last permanent incisor to erupt?

Third molars are the most unpredictable of all teeth.

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