Oleophilic polyoxyalkylene monoethers having reduced water affinity are disclosed. The command value of the target throttle opening degree is computed using a specific map selected from the plural kinds of characteristic conversion coefficient maps depending on the judgment result of the judgment function portion. A sealant is then applied to the gel-coated teeth, after which a dental prophylaxis is performed by cleaning and scaling the teeth at the gum line, gingival margins, and crevicular spaces while avoiding excessive disruption of the sealant composition. Each of the output side port mapping blocks has a plurality of second output ports and outputs the signals output to the first output ports of the switch portion from the plurality of second output ports.