Abstract: An endodontic instrument eliminates the need for conventional flutes by employing a tapered tip having an axially extending relief surface such as a flat permitting the passage of liquid and the ejection of debris from the tooth. In one embodiment, an abrasive surface of the tapered tip is produced by electrical discharge machining which provides randomly arrayed microscopic pits directly in the metallic surface of the instrument.

Abstract: A dental implant includes a first member (100) having a proximal end (102) and a distal end (104) and extends along a longitudinal axis (62). The proximal end (102) has an axial end surface (103). The first member (102) is formed from a first material. A second member (70) is integrally formed with the first member (100) and is adapted to receive a dental prosthesis (150). The second member (70) engages the entire proximal end surface (103) of the first member (100). The second member (70) intersects the axis (62) of the first member (100) at the proximal end surface (103) to prevent access to the proximal end surface (103) of the first member (100) through the second member (70). The second member (70) is formed from a polymer that is different from the first material of the first member (100).

Abstract: A monolithic dental implant is provided made from a material or materials having a elasticity moduli less than approximately 4 Msi. The materials can be either a polymer or a composite material having a polymer matrix and a fiber- or particulate-reinforced second phase. When subject to occlusive forces, the monolithic dental implant provides improved lateral transmission of the forces, resulting in a reduction in bone resorption. Additionally, because the dental implant is monolithic, it is not subject to the problems associated with bacteria collection and abrasive wear common to multi-component dental implants.

Abstract: An ultrasonic endodontic tip is provided having an elastic modulus of less than 8 Msi. The low-modulus of the material provides the ultrasonic endodontic tip the ability to navigate a curved tooth canal during a root canal procedure and controllably remove the dentine around canal without excessively enlarging the canal. The tip can include an abrasive on at least a portion of the working surface of the tip.