Using ELGYDIUM CLINIC brush head refills helps effectively clean interdental spaces to reduce the buildup of bacterial plaque responsible for causing tooth decay and gum disease. Simply insert the brush head gently, make back-and-forth movements, and your daily oral hygiene routine is complete. Using the brush head is especially recommended for people with implants, braces, or exposed roots. The black bristles of the brush head contrast well with the white of the teeth, making it easier to insert and visualize deposits as they are removed. The white bristles, on the other hand, allow you to see any occasional bleeding. Afterwards, simply clean the brush head (with a small amount of mouthwash, for example). The range of ELGYDIUM CLINIC brush head refills consists of 6 sizes, ranging from narrow (ISO 0) to wide (ISO 5), identifiable by their different colors. ELGYDIUM CLINIC Purple brush head refills (ISO 5) are suitable for wide interdental spaces. The brush head refills fit ELGYDIUM CLINIC Trio Compact and ELGYDIUM CLINIC Flex handles.