Nerve Needles TRIZ Cases

An offset center of mass creates precessional motion that reaches more canal wall while reducing binding, cyclic fatigue, and breakage.

Acoustic emission sensing detects micro-crack and failure signals in endodontic instruments, enabling early breakage warning during treatment.

Detecting the tool tip at a root-canal reference position lets the controller reverse drive to limit twisting and breakage.

An offset center of mass enables precessional, intermittent wall engagement to clean difficult root-canal areas while reducing cyclic fatigue.

A cam-driven dental handpiece adds axial reciprocation to root canal files, reducing manual lifting in confined posterior-teeth treatment.

A handpiece uses strain gauges to measure axial stress on endodontic instruments for real-time driving parameter adjustment.

A dental instrument uses a threaded rod slide mechanism to precisely adjust wire tension for controlled removal of fractured root canal instruments.

Radial grooves in the connection part direct stress concentration to induce controlled fracture outside the tooth root, preventing embedded fragment retention.

A dental handpiece uses periodic reverse rotation to reduce cutting tool load during root canal procedures.

A dental handpiece control unit monitors motor current to drive an endodontic file with alternating rotation.

Digital 3D tooth models define a custom drill guide with angled holes that direct burs to root canals, preserving tooth strength by minimizing access openings.

A multi-directional handpiece synchronizes file rotation with axial oscillation through a cam mechanism.

Exposed window in the handle enables precise electronic apex locator attachment, eliminating measurement errors from file movement and stopper thickness.

Helical coil spring rods distribute rotational stress to prevent blade fractures during root canal treatment.

A dental root canal treatment tool features a tapered working portion with a parallelogram cross-section near the shaft and lands at the tip.

A dual-port root canal activator tool extends into dentin to simultaneously heat and physically agitate antiseptic irrigants.

A dental retrieval tip discharges an electrical potential to generate an arc that welds broken metal components for removal.

A root canal cutting tool reverses rotation by a set angle to release biting from the canal wall.

A flexible sheet metal probe tool transmits oscillations from a dental handpiece to dislodge broken instrument fragments within root canals.

A dental handpiece control unit switches cutting tool rotation direction to manage applied load during root canal procedures.

Radial vibration from the drive module discharges air bubbles from drug materials, ensuring tighter attachment to root canal walls.

Integrating a liquid flushing system with a nickel-titanium file reduces fatigue-induced fractures and extends service life during root canal preparation.

Melting solder balls secures the gripper prongs to broken endodontic instruments, resolving canal obstructions that block cleaning and disinfection.

A pulsing laser system directs energy through an optical fiber to generate photoacoustic waves in root canal fluid.

Mechanical gearbox translates continuous drive motion into alternating reversal, enabling compatibility with conventional fully rotating motor controllers.

A dental handpiece controller switches to reverse rotation when load torque exceeds a reference value.