An oral care device for use in an oral cavity is provided. On the second end of the sleeve-like portion, there is arranged a holding portion which is angled at a right angle from the sleeve-like portion and in this way enlarges an outer diameter of the sleeve-like portion and forms planar bearing surfaces. An absolute time and a position are computed using the pseudoranges at a first time. At least one of the first signal and the second signal includes information in a phase domain and information in an amplitude domain. The piston includes a central one-piece mandrel having an upper end higher than any component of the piston and a lower end lower than any component of the piston so that impact forces are applied directly to the mandrel and not through a threaded component.