Plaque is a main cause of periodontal disease, brush the teeth at least twice a day is the best way to prevent plaque buildup. A research have shown that using both interdental brush and toothbrush can remove 23% more plaque than using toothbrush only. The soft bristled interdental brush can clean the gap between teeth and gums effectively. Tai Hing considered the softness, resilience and other related factors in the design to ensure the cleaning effect of the brushes. In order to improving the efficiency of making brush, stickiness and slipperiness can be customized by clients.