A tooth cleaning assembly including a rack, and at least one detachable toothpaste squeezing assembly mounted on the rack. Changes in system parameters trigger alerts in an automated manner. The first absorption solution is a partially lean absorption solution. A composite image is formed from the captured images, with each of the regions labeled with the corresponding lens-focus distance. They are used as remedies for various diseases relating to the N-type calcium channel such as encephalopathies caused by the ischemia in the acute phase after the onset of cerebral infarction, cerebral hemorrhage or the like, Alzheimer’s disease, etc. The control signal generator sequentially supplies i control signals to the data dividers, corresponding to the i data signals.