PROBLEM TO BE SOLVED: To provide means for keeping optimum brightness required for a medical examination according to a light quantity inside an examination room during a dental examination, a surrounding environment such as a shadowless lamp, and a position of a lesion inside an oral cavity to be treated such as a molar or a front tooth.SOLUTION: A dental handpiece 1 with lighting includes a lighting means 5 for lighting a subject, and an illuminance detection means 4 for detecting reflection illuminance from the subject near an end part of a handheld member, and further includes a monitoring means for monitoring a current and a voltage supplied to the lighting means 5, a storage means 14 for storing a prescribed value, a comparison means for comparing an illuminance detection value and/or the monitored values of the current and the voltage with the prescribed value, a control means for controlling current and voltage values according to a value obtained from the comparison means, and a setting means 12 for arbitrarily setting the prescribed value stored in the storage means 14. The dental handpiece 1 with lighting further includes an alarm means 8 for comparing the monitored value obtained from the monitoring means with the prescribed value preserved in the storage means 14, detecting abnormal condition and generating an alarm.COPYRIGHT: (C)2013,JPO&INPIT【課題】歯科診療中の診療室内の光量や無影灯等の周辺環境、及び臼歯または前歯等の診療する口腔内患部の位置に応じて、診療に必要な最適な明るさを保持する手段を提案する。【解決手段】照明付き歯科用ハンドピース1は、手持部材の先端部近傍に、被写体を照明する照明手段5と、被写体からの反射照度を検出する照度検出手段4を設け、照明手段5に供給される電流、電圧を監視する監視手段と、所定値を記憶する記憶手段14と、照度検出値及び/又は電流、電圧の監視値と該所定値を比較する比較手段と、比較手段から得られた値から電流、電圧値を制御する制御手段と、記憶手段14に保存されている所定値を任意に設定する設定手段12とを設けた。さらに監視手段から得られた監視値と、記憶手段14に保存されている所定値とを比較し、異常を検出して警告を発生する警告手段8を有する。【選択図】図1
