Teeth-Growth Science Worksheet printable pdf download

Teeth-Growth Science Worksheet

5. Teeth – growth

1. Find synonyms for the following words:

baby teeth _________

become visible_________ progress _________

long-lasting _________

Deciduous teeth, otherwise known as, more commonly primary teeth, are the first set of teeth in the

growth development of humans and other mammals. They develop during the embryonic stage of

development and erupt during infancy. They are usually lost and replaced by permanent teeth, but in

the absence of permanent replacements, they can remain functional for many years.

denture_________

eruption of first teeth _________

lower jaw _________

The development of primary teeth starts at the sixth week of tooth development. By the time the

embryo is eight weeks old, there are ten buds on the upper and lower arches. These teeth will continue

to form until they erupt in the mouth. In the primary dentition there are a total of twenty teeth: five per

quadrant and ten per arch. Teething begins at the age of six months and continues until twenty-five to

thirty-three months of age. Usually, the first teeth seen in the mouth are the mandibular centrals and

the last are the maxillary second molars.

show up_________

absorbtion _________

The primary dentition is made up of central incisors, lateral incisors, canines, first molars,

and secondary molars; there is one in each quadrant, making a total of four of each tooth. The

replacement of primary teeth begins around age six, when the permanent teeth start to appear in the

mouth, resulting in mixed dentition. The erupting permanent teeth cause root resorption, where the

permanent teeth push on the roots of the primary teeth, causing the roots to be dissolved by

odontoclasts and become absorbed by the forming permanent teeth. By age twelve there usually are

only permanent teeth remaining.

2. Label the diagram showing baby teeth.

Teeth-Growth Science Worksheet