Internal Osteosythesis TRIZ Cases

A circumferential spring portion engages the receiving-part wall to ease assembly and prevent upward movement in polyaxial bone anchoring.

A friction-fit compression insert temporarily restrains shank pivoting before final locking, improving surgical control and pull-out resistance.

A deformable insert passes through a limited incision hole and fixes adjacent spinous processes to improve spinal stability.

Preassembling the screw shank, rod seat, and retainer collar simplifies assembly and supports varied thread diameters and pitches.

Curved distal tips can bend over time; a monitoring system measures deviation and updates the virtual instrument representation.

Tension-loaded flexures convert compressive forces between endplates into tensile loading, balancing spinal stability with physiological motion.

Superelastic material maintains axial fastener bias during cyclic loading, preserving fracture compression while reducing implantable parts.

Concave undercut helical threads engage both vertebral bodies to resist multi-axial forces and stabilize the intervertebral space.

Flexible, removable rod connectors help occipital plates secure stabilization rods across varying skull angles during cervical fixation.

Tether-guided fasteners place an inner-surface rib plate through a VATS portal for secure stabilization with less surgical trauma.

Slots, fasteners, and tensioned tethers let a plate stabilize multiple fractures through small VATS portals while limiting surgical trauma.

Slotted plates, captive fasteners, and tethers support VATS fracture fixation while limiting surgical trauma and recovery time.

A reduction member passes through the plate to align femoral neck fractures without open exposure, while fixed-angle elements provide stable support.

A worm drive moves the locking screw for precise bone-fragment positioning, while saw-tooth engagement maintains alignment after adjustment.

An expandable open-ring retainer captures the shank during bottom loading, preventing floppy rotation and stabilizing receiver alignment.

An angled actuating portion drives a pressure member to quickly lock and unlock a rod-to-bone anchor coupling during spinal correction.

A rail-window plate and looped tension band reduce manual variability during sternum fixation while supporting healing and fluid management.

This bi-portal fusion system combines expandable interbody implants and robotic guidance to improve alignment and reduce imaging time.

An inductively powered SMA actuator and locking clutch provide controlled internal limb lengthening with remote monitoring.

A conductive glycol dimethacrylate medium dissipates charge during microscopy.

This cervical screw inserter uses threaded engagement, button translation, and knob locking to secure spinal screw placement.

An offset guide holds the joint reduced while directing centered drilling through thicker coracoid bone and supporting implant placement.

A traditionally machined shaft and additively made porous receiver support bony in-growth while preserving spinal construct stability.

Separate implant members and a threaded mechanism provide adjustable vertebral spacing while limiting incision size and invasiveness.

Magnetic tibial angle adjustment helps limit nonunion and recovery burdens.

Integrated expansion mechanisms lock the nail in the bone canal, limiting rotation and translation without bicortical screw incisions.

A cervical plate and inserter combine high-angle screw fixation with simultaneous interbody spacer placement to streamline fusion.

This case uses tracked trial instruments and real-time imaging to align spinal implants accurately with patient anatomy.

This case uses flexible longitudinal extensions to distribute forces and reduce PJK/PJF risk with less soft tissue disruption.

An inner shank and outer sleeve provide sacral and iliac anchoring for stability, fusion, and minimally invasive insertion.

A segmented loading and dispensing path helps limit contamination, spillage, and clogging during controlled bone material delivery.

Preformed rods and antimicrobial cement simplify stable, customizable spacer treatment.

A wearable IMU and implant sensors share motion, strain, pressure, and temperature data for objective postoperative assessment.

This case combines rod-plate, shaft, and external fixation components to stabilize Charcot foot while supporting postoperative walking.

Multiple locking threads join an outer oval sheath to the pedicle screw, distributing forces and reducing vertebral stress and loosening.

A convex fastener head and concave anchor surface enable polyaxial rotation while supporting strong, stable spinal rod fixation.

A hermetically sealed motor and wireless controls enable implantable bone lengthening without percutaneous fixation.

An intra-osseous support structure works with an exterior plate to distribute tension and compression while maintaining bone alignment.

This case uses a collapsible-to-expandable barrel, angled plates, and graft spaces to support fusion while reducing spinous-process damage.

This hip surgery instrument uses separate pelvic and femoral access paths to implant prosthetic parts without damaging the capsule.

Intramedullary fibers distribute 400–500 nm blue light for targeted antimicrobial treatment without systemic antibiotics.

A guided arced-drilling approach forms scalloped bone channels for secure joint insert seating with less bone removal.

Rotatable screw platforms improve angular stability in anterior spinal correction.

This bone fixation implant separates wrapping and fastening, using a marked severing region for rapid thoracic re-entry.

A vertebral fixation plate uses elastic retention arms to engage screw heads, limiting backout while reducing surgical complexity.

An implanted magnet and screw mechanism enables controlled tissue distraction while removing external components and infection pathways.

Reusable drivers and adapters enable outside-surgical-field setup, screw insertion, decoupling, and subsequent cement delivery.

The blade combines retraction and distraction while a flexible lasso secures pedicle screws for clear implant access.

A magnetic arc lifter adjusts tissue distraction with fewer access sites.

Pivotable arms and a threaded cannulated tube combine lateral and axial rod reduction with set screw access through one instrument.