An oral hygiene kit comprises a paste-dispensing toothbrush assembly and a cooperatively associated floss assembly. The toothbrush assembly comprises a paste-dispensing brush, a paste pump assembly, a piston, and a paste reservoir. The pump assembly is operable to drive the piston within the paste reservoir for forcing paste from the paste reservoir. When forced from the paste reservoir, paste is conveyed via a paste conduit through the paste-dispensing brush to a brush head. The floss assembly is cooperatively associated with the toothbrush assembly and comprises a spool-supporting lid, a floss spool, and a floss cap. The spool-supporting lid covers the paste-dispensing brush and supports the floss spool. The floss cap covers the floss spool and provides the kit with a floss-cutting structure. Together the toothbrush assembly and the floss assembly may contribute to a user's oral hygiene.