CANAL INSTRUMENT HOLDER

To enable an opening direction of a collateral to be detected with a high degree of accuracy by reducing unsteadiness of a measuring electrode.SOLUTION: A canal instrument holder is provided for locking a measuring electrode to be inserted into a dental root canal in dental diagnosis. The canal instrument holder comprises: an insulating tube that extends in one direction; a conductor stick that has a conductor hook and is inserted into the insulating tube with the conductor hook left outside a tip opening part of the insulating tube; an operation part that is connected to the insulating tube and presses a rear end of the conductor stick so as to project the conductor hook from the tip opening part; and an energization part that energizes the conductor stick to the rear end side so as to draw back the conductor hook after the operation by the operation part and lock the measuring electrode in the opening part. In the state of locking the measuring electrode, total length of the insulating tube and the operation part is set within a range from 35 mm to 55 mm.SELECTED DRAWING: Figure 1 【課題】測定電極のフラツキを低減してより高い精度で側枝の開口方向を検出可能にする。【解決手段】歯科診断で歯の根管に挿入される測定電極を係止するためのキャナルインスルメントホルダーが提供される。キャナルインスルメントホルダーは、一方向に伸びる絶縁管と、導体フックを有し、導体フックを絶縁管の先端開口部の外に残して絶縁管に挿入される導体スティックと、絶縁管に結合され、導体フックを先端開口部から突出させるように導体スティックの後端を押圧するための操作部と、操作部の操作後に導体フックを引き戻して測定電極を先端開口部に係止するように導体スティックを後端側に付勢するための付勢部材とを備え、測定電極を係止した状態で絶縁管および操作部との合計長が３５ｍｍから５５ｍｍの範囲に設定される。【選択図】図１