During the evolution of T Tauri stars and the formation of their planetary systems, accretion processes play a key role. However, the more complex interaction at the rim of the inner region of the disk is still not well understood. Some young stars exhibit recurrent, quite irregular flux dips in their photometry (dippers). These can be explained as extinction events by dusty material from the protoplanetary disk, which is accreted onto the star. In the magnetospheric accretion scenario, the magnetic field of a young star truncates the disk where the magnetic field pressure is equal to the ram pressure of the accreting material. If the temperature close to this distance is low enough to avoid dust sublimation, dust might be lifted above the...