Internal Osteosythesis TRIZ Cases

Deformable washer rim locks screw against migration yet releases for removal after healing.

One-way gear reduction clips connect preflexed rods to injured vertebra nails, enabling automatic anatomical height restoration.

Segmenting the nail into a helical spring sheath and rigid core resolves insertion difficulty through narrow kinks while maintaining bending stability.

A bone anchoring device uses a movable outer ring to adjust rod contact surfaces for versatile spinal fixation.

A spinal screw assembly uses a rotatable ball joint head and pressure cap to secure fixation rods.

A stylet screw driver uses a spring-loaded button to adjust protrusion length for precise spinal screw placement.

An intramedullary nail fuses the tibiotalar joint while preserving subtalar motion.

An out-of-plane planar spring accommodates short pedicle spacing while articulation components permit polyaxial rotation.

An expandable spinal fixation system uses segmented barrel halves and a fixed intermediary assembly to secure spinous processes.

An interspinous device with a central cage expands the foramen area to unload facet joints while avoiding deep pedicle screw insertion.

A medical system processes tissue electrical characteristics to emit warning signals.

An intervertebral disc prosthesis integrates tusks and screws for dual-point fixation within a single insertion step.

A femoral stem with a space truss structure distributes compressive forces across multiple planes to enhance bone fusion.

An intramedullary nail incorporates multiple holes oriented at different angles to accommodate bone screws inserted into cortical regions.

Nested components allow insertion through limited access while distributing stress to reduce adjacent segment deterioration.

A bi-planar adjustable implant with unique geometry and osteointegration surfaces enables precise spinal realignment through pivoting planes.

Offset nucleus design corrects sagittal and coronal deformities while preserving natural spinal motion.

Nested blade assembly creates a clean cavity through a narrow cannula, reducing blood loss and recovery time.

A flexible shaft rod inserter uses a rotatable knob to secure vertebral rods through a single incision.

Concave band spacers distribute cerclage wire pressure over a larger bone surface area, preventing tissue necrosis caused by high point loads.

Integrated reservoir eliminates external mixing contamination while merging implantation steps to reduce handling complexity.

A pedicle screw features a pivoting head and sliding yoke to enable dynamic spinal movement.

A fenestrated bone screw insert system delivers medicants through aligned channels to specific fracture sites.

Transverse protrusions define flank position without narrowing the instrument passage, preventing uncontrollable movement and simplifying cleaning.

Segmenting the bone anchor from the body resolves visibility and access constraints during spinal surgery.

A multifunctional clamping sleeve couples to bone screws via an intermediary insertion instrument to simplify surgical handling.

A spinal implant system uses flexure assemblies and swivel joints to enable natural vertebral movement.

A bone alignment system uses a threaded push rod to reposition fractured fragments away from the plate.

Nested plate design maintains low height profile while securing coupling through localized anchoring features and thermal contraction mechanisms.

A cannulated fenestrated polyaxial screw enables angular insertion and internal cement delivery through hollow shaft channels.

Segmented enclosing and articulating bodies maintain physiological motion to prevent adjacent segment degeneration caused by rigid fusion.

A helical rod stabilizes long bone fractures with controlled stiffness.

A connection sleeve uses snap-engagement to secure a threaded screw rod within an orthopedic plate.

A spinal fixation plate uses a biasing member and locking slide to secure anchor elements in place.

A bone plate integrates a spacing assembly to maintain a cutting gap and shift to an operative position for stable fixation.

Rotatable guide wire targeting assembly stabilizes capital fragment across three planes, reducing malpositioning risk during minimally invasive bunionectomy.

A flexible reference tie with a fiducial marker wraps around the spine to provide a stable tracking point.

A spinal distraction assembly uses a guide bar translating through a body channel to adjust anchor engaging arms.

Open-cell metal foam and variable thread pitches improve sacroiliac screw retention by facilitating 360-degree bone growth and imparting compressive loads.

Radial extensions on the pedicle screw head abut the receiving sleeve to absorb lateral loads up to 500N while blocking transverse pivoting.

An anti-rotation mechanism with spikes prevents bone screw rotation, addressing loosening risks caused by cantilever pullout forces in osteoporotic bone.

A spinal rod connector uses interchangeable fixation and closure members to secure or slide rods within a compact main body.

An arched hipbone prosthesis with an adjustable acetabular cup provides stable weight distribution.

Arcuate osteotomy guide template reorients the tibial plateau via segmented reference surfaces, resolving precision versus tissue trauma trade-offs.

An activation tool uses magnetic coupling to rotate a bone expansion apparatus via an electric motor and control module.

Segmented fixation elements within a hollow body anchor short bone end fragments, enabling distraction without excessive surgical exposure.

An expandable interspinous process fixation system uses a central ramp to move endplates outwardly, achieving an anatomical fit.

A magnetic targeting member attached to a flexible tether guides surgical implants through narrow anatomical pathways.