Abstract: An ultrasonic insert carries a rotary bearing adjacent to the transducer. The bearing slidably engages an ultrasonic handpiece. When seated in the handpiece, the insert is substantially decoupled, on a rotary axis, from the handpiece. A rotary force need only be applied to the insert to rotate it in the handpiece. Alternately, an adaptor can be inserted into the handpiece. The adaptor slidably receives a conventional ultrasonic insert. The conventional insert can be easily rotated with a force applied only thereto, relative to the handpiece.

Abstract: An ultrasonic insert insertable into a handpiece for carrying out a dental treatment is easily rotatable by a practitioner with only two fingers. The body of the insert is clamped via a torque lock element which carries a plurality of radially extending barbs which lock a handle thereto. The handle is locked to the torque lock element and is not movable relative thereto either axially or rotatably.

Abstract: An ultrasonic insert carries a rotary bearing adjacent to the transducer. The bearing slidably engages an ultrasonic handpiece. When seated in the handpiece, the insert is substantially decoupled, on a rotary axis, from the handpiece. A rotary force need only be applied to the insert to rotate it in the handpiece. Alternately, an adaptor can be inserted into the handpiece. The adaptor slidably receives a conventional ultrasonic insert. The conventional insert can be easily rotated with a force applied only thereto, relative to the handpiece.

Abstract: A dental instrument has an elongated handle, in one embodiment, a molded resin handle which incorporates an elongated metal insert, and in another embodiment, a metal handle. At least one tip carrying cone is slidably received into a hollow end of the respective handle after adhesive has been injected into the respective end of the handle. As the stem of the cone slides into the handle and through the adhesive, the adhesive flows into the stem and around and through torque lock features in the stem. Features include one or more slots in the stem or alternately one or more holes or protrusions in or on the stem. When the adhesive cures a solid mass of adhesive engages the torque lock feature and in combination with the interior periphery in the handle, the instrument exhibits an ability to pass applied torque tests on the order of 400 newton-centimeters without damage or relative motion between the operative tip and the resin handle.

Abstract: An ultrasonic insert carries a rotary bearing adjacent to the transducer. The bearing slidably engages an ultrasonic handpiece. When seated in the handpiece, the insert is substantially decoupled, on a rotary axis, from the handpiece. A rotary force need only be applied to the insert to rotate it in the handpiece. Alternately, an adaptor can be inserted into the handpiece. The adaptor slidably receives a conventional ultrasonic insert. The conventional insert can be easily rotated with a force applied only thereto, relative to the handpiece.

Abstract: An ultrasonic insert carries a rotary bearing adjacent to the transducer. The bearing slidably engages an ultrasonic handpiece. When seated in the handpiece, the insert is substantially decoupled, on a rotary axis, from the handpiece. A rotary force need only be applied to the insert to rotate it in the handpiece. Alternately, an adaptor can be inserted into the handpiece. The adaptor slidably receives a conventional ultrasonic insert. The conventional insert can be easily rotated with a force applied only thereto, relative to the handpiece.

Abstract: A dental instrument has an elongated handle, in one embodiment, a molded resin handle which incorporates an elongated metal insert, and in another embodiment, a metal handle. At least one tip carrying cone is slidably received into a hollow end of the respective handle after adhesive has been injected into the respective end of the handle. As the stem of the cone slides into the handle and through the adhesive, the adhesive flows into the stem and around and through torque lock features in the stem. Features include one or more slots in the stem or alternately one or more holes or protrusions in or on the stem. When the adhesive cures a solid mass of adhesive engages the torque lock feature and in combination with the interior periphery in the handle, the instrument exhibits an ability to pass applied torque tests on the order of 400 newton-centimeters without damage or relative motion between the operative tip and the resin handle.

Abstract: An ultrasonic insert insertable into a handpiece for carrying out a dental treatment is easily rotatable by a practitioner with only two fingers. The body of the insert is clamped via a torque lock element which carries a plurality of radially extending barbs which lock a handle thereto. The handle is locked to the torque lock element and is not movable relative thereto either axially or rotatably.

Abstract: An ultrasonic insert carries a rotary bearing adjacent to the transducer. The bearing slidably engages an ultrasonic handpiece. When seated in the handpiece, the insert is substantially decoupled, on a rotary axis, from the handpiece. A rotary force need only be applied to the insert to rotate it in the handpiece. Alternately, an adaptor can be inserted into the handpiece. The adaptor slidably receives a conventional ultrasonic insert. The conventional insert can be easily rotated with a force applied only thereto, relative to the handpiece.

Abstract: A dental instrument includes a plastic molded handle body which is reinforced by a metallic tube through a center of the body. Tool parts are adhesively secured into opposing open ends of the reinforcing tube. During assembly, a quantity of adhesive is pre-positioned into the open ends. The tool parts include respective base parts that provide glue traps for capturing a quantity of the pre-positioned adhesive and ensuring adequate adhesive contact between the tool part and the tool. The molded body has surface contours which are molded by a mold having a single parting plane.