Teeth cleaning device

There is provided a brush head portion of a toothbrush, the toothbrush having a handle portion (10) to which the brush head portion can be attached, comprising a brush head assembly comprising a bristle portion detachable from the handle portion (10) of the toothbrush. In this case, communication means for data communication between the brush head assembly and the handpiece (10) are provided, and with a storage element in the brush head assembly for storing data, wherein the data are written into the storage element.