The adult human mouth has 32 teeth. There are four canine teeth and eight incisors, the teeth in the front of the mouth used for biting. The eight bicuspids are located between the canine teeth and molar teeth. The 12 molars are for chewing and grinding food. Each type of tooth has a distinct root system and shape. This model is a molar.

Lay the Styrofoam on a flat surface. Draw the outline of the molar centered on the sheet of Styrofoam. Draw a horizontal line on the Styrofoam moving away from the edge of the tooth where the molar is at the narrowest width. Repeat the horizontal line on the opposite side of the tooth. This will be the gum line.

Cut away the Styrofoam above the gum line to create the outline of the molar usually visible in the mouth. Draw the outline of the root up from the bottom of the tooth as indicated by the template. Draw the outline of the pulp so it is below the gum line in the center of the tooth.

Draw the outline of the dentin as indicated by the template. Leave a thin layer of white Styrofoam around the inside edge of the molar outline to represent the enamel. The dentin should extend above the gum line.

Use a fine or medium paintbrush to paint the nerve and pulp purple. Use a medium or fine paintbrush to paint the dentin pink. Use the thick paintbrush to paint a thick line of red onto the Styrofoam around the outside of the molar model. The red represents the gum. Paint the remainder of the Styrofoam outside of the molar model gray to represent the bone of the jaw. Allow the paint to dry.

Create labels for each item on paper. Cut out each label with scissors and glue to the correct location on the model. Allow the glue to dry.