Abstract: An angle-measurement assist device suitable for a visual inspection to determine a blade angle of a dental scaler is provided with a holder having a flat face thereof adapted to be in contact with a bladed portion of the scaler, a permanent magnet mounted to the holder, and first, second and third pins projecting from the holder in the directions which are perpendicular to one another, whereby an operator is permitted to make a visual inspection to determine whether the scaler is sharpened to have a target blade angle on the basis of an extending direction of the first pin, with the assist device magnetically retained on the scaler.

Abstract: An angle-measurement assist device suitable for a visual inspection to determine a blade angle of a dental scaler is provided with a holder having a flat face thereof adapted to be in contact with a bladed portion of the scaler, a permanent magnet mounted to the holder, and first, second and third pins projecting from the holder in the directions which are perpendicular to one another, whereby an operator is permitted to make a visual inspection to determine whether the scaler is sharpened to have a target blade angle on the basis of an extending direction of the first pin, with the assist device magnetically retained on the scaler.

Abstract: A manually-operated sharpening apparatus includes a sharpening member for sharpening a sharpened member such as a dental instrument, a guide member for guiding the sharpened member so as to be movable therealong, and a positioning-assist element for permitting an operator to dispose the sharpened member at a location at which a predetermined angle is formed between the sharpened member and the sharpening member. With use of the sharpening apparatus, the operator can easily sharpen a blade of the sharpened member at a desired blade angle.

Abstract: There is provided a substantially disposable dental tip incorporated in an ultrasonic scaler and a dental working distal end piece used for the dental tip.The dental tip in accordance with the present invention includes a transmission medium whose proximal end portion is connected to an ultrasonic vibration source to transmit ultrasonic vibrations generated from the ultrasonic vibration source and the dental working distal end piece of the present invention which is mounted on a distal tip end of the transmission medium and consists of a tip end member having a shape suitable for dental treatment etc. and a connecting portion connected integrally to a proximal end portion of the tip end member.

Abstract: A dental tip comprises a proximal end portion connected to a drive source and a distal end portion adapted to act on a region to be subjected to dental treatment. The distal and proximal end portions are formed of a composite-material molded product which includes a plastic base material and an inorganic filler or/and an organic filler compounded therewith. This tip can produce the same treatment effect as a conventional one without damaging teeth or prostheses in dental treatment, and can be manufactured with ease. Thus, the tip is low-priced and disposable.