The group's principal activity is to develop, manufacture and market equipment used by dentists, dental hygienists, dental assistants and consumers. the group offers disposable and metal prophy angles, prophy cups and brushes, panoramic x-ray machines, dental handpieces (drills) and related components. the group's manufacturing and distribution facilities are located in missouri, california, indiana, colorado, tennessee and texas. the group markets its products in canada, europe, south america, central america and the pacific rim. major customers of the group are henry schein, inc. and patterson dental company. on 12-jun-2001, the group acquired the assets of biotrol. professional dental equipment accounted for 92% of 2001 revenues and retail dental equipment, 8%.