A dental water jet is presented to solve the problem that washing area provided by prior dental water jet is not adjustable. This dental water jet comprises a handle with a chamber and a plurality of anterior water channels, with one end of each anterior water channel is in communication with the chamber an ejecting head with a plurality of posterior water channels, with the ejecting head is set at one end of the handle, with one end of the posterior water channels are in communication with the other end of the anterior water channels with the other end of each anterior water channel forms a nozzle at one end of the ejecting head and a regulator with a inlet channel and a plurality of inlet holes, with each of the inlet hole is in communication with the inlet channel with the regulator is movably set in the chamber to control the interconnection between the inlet holes and the anterior water channels.一種沖牙裝置,用以解決習知沖牙面積無法調整的問題。該沖牙裝置包含:一握柄,具有一容置空間及數個前段水道,該數個前段水道的一端分別連通至該容置空間;一沖牙噴頭,具有數個後段水道,該沖牙噴頭設於該握柄的一端,該數個後段水道的一端與該數個前段水道的另一端相連通,該數個後段水道的另一端則分別於該沖牙噴頭的一端形成一噴嘴;及一調控件,設有一進水通道及數個注水孔,且該數個注水孔分別與該進水通道相連通,該調控件可移動地設於該握柄的容置空間,以控制該數個注水孔與該數個前段水道的連通狀態。1‧‧‧握柄1a‧‧‧第一殼體1b‧‧‧第二殼體11a、11b‧‧‧凹槽12‧‧‧螺孔13‧‧‧前段水道14‧‧‧入水口15‧‧‧開槽16‧‧‧管槽2‧‧‧沖牙噴頭2a‧‧‧連接端2b‧‧‧出水端21‧‧‧後段水道22‧‧‧噴嘴3‧‧‧調控件31‧‧‧基部311‧‧‧進水通道312‧‧‧注水孔313‧‧‧嵌槽32‧‧‧調控部33‧‧‧防漏件4‧‧‧連接管5‧‧‧進水管C‧‧‧容置空間S‧‧‧螺絲
