Enamel, Dentin and Pulp

The neonatal line in enamel is also:

• an enamel spindle

• a Line of Retzius

• an enamel tuft

• a Hunter-Scheger band

What is formed when Hertwig epithelial root sheath (HERS) encounters a blood vessel?

• Pulp stones

• an odontogenic cyst

• An accessory canal

• an epithelial pearl

During tooth development, both the pulp and dentin in the mature tooth are products of:

• dental sac

• enamel organ

• dental papilla

• Inner Enamel Epithelium (IEE)

The approximate amount of inorganic material in mature enamel is:

• 66%

• 76%

• 86%

• 96%

Dentin in the mature tooth is produced as a result of secretion by:

• ameloblasts

• odontoblasts

• cementoblasts

• osteoblasts

The crystalline structural unit of enamel is:

• enamel rod

• enamel tuft

• enamel lamellae

• Tomes Process

All of the following characteristics are true of dentin EXCEPT:

• dentin is less hard than enamel

• dentin is vascular

• dentin makes up bulk of the tooth

• dentin is more radiopaque than pulp

Ameloblasts are derived from the:

• Outer enamel epithlium (OEE)

• Stellate reticulum

• Stratum intermedium

• Inner enamel epithelium (IEE)

After ameloblasts are finished with enamel apposition and maturation, they become part of the:

• Reduced enamel epithelium (REE)

• Hertwig epithelial root sheath (HERS)

• Epithelial Rests of Malassez

• dentin-pulp complex

All of the following is true about pulp EXCEPT:

• Pulp is a connective tissue

• Pulp is more radiopaque than dentin

• Pulp forms from central cells of dental papilla

• Pulp is the innermost tissue of the tooth