Fig. 3From: Patients’ awareness regarding the quality of their oral hygiene: development and validation of a new measurement instrumentExample of one of the 12 items of the SPOCd scale translated into English. The 12 items refer to the inner and outer surfaces of the 6 sextants. Participants place the red triangle between "none clean" and "all clean" to indicate their estimation. Before answering the items, participants read an explanation of the MPI (for details, see text and Additional file 1)Back to article page