(kal'kyū-lŭs sŭr'fŭs in'deks), An index that measures only dental calculus, used for evaluating new calculus formation within a large group of test subjects.
Cal·cu·lus Sur·face In·dex
(CSI) (kalkyū-lŭs sŭrfăs indeks) Measurements of dental calculus, used for evaluating new calculus formation within a large group of test subjects.