What date was the toothbrush invented?

The modern toothbrush, as we know it today, was invented in 1938. However, the earliest forms of toothbrushes date back to ancient civilizations, with records of the Babylonians and Egyptians using chew sticks as early as 3500 BC. The first bristle toothbrush, made from hog hair, was developed in China during the Tang Dynasty around the 7th century.