Internal Osteosythesis TRIZ Cases

Bioabsorbable materials and compliance members modulate stiffness over time, reducing stress shielding while maintaining initial stability.

A modular vertebral reduction instrument uses a scissor mechanism to provide independent orthogonal translations for precise spinal segment correction.

A bone graft injector uses a ratchet mechanism to expel material through a delivery tube.

Polyaxial receiver decouples stress on screw shank, reducing backout risk while allowing limited vertebral movement.

Placing the sensor inside the clearance hole maintains tracking accuracy despite implant deformation under external forces.

A flexible drill orients its tip at a predetermined angle through a straight pedicle passage, enabling direct intervertebral space access for mechanical fusion.

Impregnating the porous attachment structure creates a mechanical interlock that resists tensile forces and prevents disassociation in orthopedic devices.

Bottom-loading modular anchors resolve alignment difficulties by allowing surgeons to adjust angles before rod insertion, reducing implant parts needed.

Segmented allograft spacers adapt to patient anatomy while deployable retainers prevent migration through minimally invasive insertion.

Wireless-charged autonomous prosthesis lengthens limbs to match healthy sides, eliminating clinical visits and radiation exposure.

Grooved crimp with set screw locks cable to reduce tissue trauma during bone fixation.

A retractable sleeve with a weakened region separates from a high-friction spinal implant, preventing adjacent tissue and nerve damage during placement.

A posterior spinal prosthesis covers exposed spinal cord areas and prevents soft tissue cavitation after decompression surgery.

A mobile cage system with a nucleus and caps preserves spinal motion kinematics while reducing adjacent segment degeneration.

Nested telemetric intramedullary nail with optimized strain gauges detects inter-fragmentary movement to diagnose delayed fracture union.

A spinal plate positioning system uses a guide member attached to an interbody cage to align the plate and drill pilot holes.

A surgical instrument uses a translation mechanism to slide a cutting block for precise bone resection.

A laterally-extending dovetail engagement feature aligns an implant inserter shaft with a fusion cage recess to secure axial positioning during surgical insertion.

A multi-axial spinal cross-connector uses a central pivot junction to join fixation rods at adjustable angles.

Tapered femoral neck rod engages a diagonal main body shaft hole to provide stable mechanical interlocking.

A sternum closing fixator uses a pre-loaded spring to force elastic claws against each other for rapid opening.

A biomaterial delivery system mixes components at the point of injection to enable controlled setting during fracture fixation procedures.

Modular arms with articulation drive mechanisms accommodate varying patient anatomy, reducing tissue trauma during spinal procedures.

A dorsal surgical implant stabilizes adjacent metatarsals using bone-engaging hooks and an intermediate connecting element.

Radial closures rotate to engage a cam structure, securing a threaded shank while resolving locking complexity trade-offs.

A bone support apparatus uses a resilient cradle insert and adjustable rod assembly to accommodate patient growth.

Segmented bone plate design allows in-situ deformation to match complex fractures, eliminating time-consuming screw removal and re-screwing.

An integrated universal joint and threaded projection allow a single drive member to pivot and lock an implant holder, reducing component count.

Segmented blocks with spike arrays penetrate bone to stabilize multiple spinal levels while accommodating varying vertebrae sizes.

Tapered spinous process device restores anatomy while preserving vertebral mobility, avoiding excessive immobilization from fusion.

Segmented rigid end plates with a compressible core restore disc height to relieve pain while maintaining natural spinal motion.

Mosaic implants use interconnected plates and wires to conform to curved surfaces, resolving structural support and bone formation trade-offs.

Segmented prosthetic joint components correct severe spinal deformities while preserving physiological motion.

A PEEK wedge implant with titanium mesh stabilizes bone while enabling clear postoperative imaging.

A ligament fixation implant uses a threaded compression cap to secure bone anchors during initial healing.

Segmented artificial hip joint surfaces enable secure bone fixation through minimally invasive puncture insertion, reducing infection risk and tissue damage.

A spinal fixation device pivots up to 95 degrees using a crush ring mechanism that expands a locking ring to fix the bone screw, correcting deformities.

Shock absorber housing prevents cord twisting and kinking while adjusting tension to correct inter-metatarsal angle in hallux valgus treatment.

An actuating mechanism drives a sliding cutting blade to minimize separation force and prevent jagged edges on the fixation device.

An expandable membrane delivers bone filler material through a dual cannula system for precise vertebral augmentation.

Porous fenestrated implants resolve the strength versus bone integration contradiction by enabling structural support and cellular ingrowth.

A flexible distraction implant uses an elastic member and tension members to apply force between anchor points.

Offset teeth rows anchor the tibial component without bone resection, creating a low friction interface that relieves osteoarthritis pain.

A nested distractor device uses a threaded internal post to expand bone segments through minimally invasive implantation.

Optical tracking replaces visual estimates to determine precise rod geometries, eliminating alignment inaccuracies during spinal fixation procedures.

Single-part device merges clamp and screw to simplify minimally invasive spinal surgery positioning.

An oblique lateral surgical pathway allows spinal implants to access lumbar disc spaces without damaging adjacent musculature and neural structures.

Internal springs maintain dynamic compression during bone healing, preventing the loss of axial stability caused by biological resorption.

Reverse external thread on the screw head enables precise engagement with a withdrawal jig, overcoming callus adhesion that blocks internal threads.