Internal Osteosythesis TRIZ Cases

Varying thread pitches and concave undercut surfaces improve bone fixation and load sharing under multi-axial and off-axis loading.

Serpentine slots in a rigid hollow connecting rod add flexibility for misaligned tubing while preserving support and fluid flow.

A helical joint and pivot linkage enable continuous connecting rod length adjustment without misalignment, improving precision and manufacturability.

Flexible couplers and rigid rods let one spinal implant match patient curvature while combining dynamic stabilization and rigid fixation across levels.

A torque-activated distal tip lets a resorbable bone screw self-tap into bone, improving fixation while eliminating pilot hole tapping.

A torque-activated expanding shaft lets a resorbable bone screw self-tap and improve fixation strength without pilot hole tapping.

Graduated scales and handle locking give real-time K-wire protrusion measurement, helping prevent vertebral puncture and tissue injury.

Rotatable end bodies and a motion-converting lock let surgeons fit spinal plates to varied spine shapes with secure fixation and smaller incisions.

Coordinated CNC tool handoff forms a continuous multi-pitch bone screw thread, reducing cross-threading, insertion torque, and predrilling needs.

A segmented cement-in retainer improves adhesive wetting in lightweight panels, preventing air pockets and securing inserts across gap variations.

Single-step extrusion of magnesium-calcium alloys improves implant strength and ductility while limiting degradation and hydrogen evolution.

Screw-driven clamping blocks lock multiple bosses at once, simplifying bicycle folding joints while maintaining rigid, convenient fastening.

Moveable tracking markers let a surgical robot determine accurate 3D positions with fewer sensors, improving flexible instrument tracking.

Automated rod feeding, braking, and bending replace cumbersome manual tools to form surgical rods precisely while avoiding notches that shorten fatigue life.

A motorized roller bends surgical rods during axial feed and rotation, cutting manual shaping time while reducing fatigue and surface damage.

A lever, carriage, and pawl mechanism bends spinal fixation rods with less hand force while improving visibility and control during shaping.

An in-situ spine rod cutter uses a drill guide, rotating mill, and catch cup to trim implant length precisely while containing chips during surgery.

Automated rod bending uses curvature data and controlled rotation to shape surgical rods precisely while reducing fatigue, surface damage, and time.

Ultrasound-powered subcutaneous sensing enables non-invasive in vivo force, pressure, and temperature monitoring at adjustable implant sites.

Ball bearings and tapered races create a self-aligning surgical handle coupling that locks axially, transmits torque, and repositions easily.

Rotational drive and movable rod holders enable precise implant bending or cutting at the surgical site with less force and fewer adjustments.