Round 9: Tossup 8

These body parts are partly created by ameloblasts, whose activity (15[1])creates tree-ring-like striae of Retzius. Bacteria that grow on these body parts like Streptococcus mutans (15[1])are particularly destructive toward their cementum. A hook-shaped WHO (15[2])probe is used to measure the depth of the sulcus between these body parts and the surrounding (-5[1])(*) gingival tissue. These body parts’ deciduous type erupt during infancy and are typically lost before adulthood. Sugar-fermenting bacteria form a biofilm called plaque on these body parts and can demineralize their enamel. For 10 points, name these (10[1])body parts including incisors, canines, and molars. ■END■

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