Internal Osteosythesis TRIZ Cases

Shape-memory elements expand within the medullary canal to provide stable fixation, eliminating distal screw holes and reducing X-ray exposure during surgery.

Segmented end bodies rotate independently via locking mechanisms to match diverse patient spine shapes, resolving attachment accuracy issues.

Integral resilient locking members constrain spinal screws against migration, eliminating separate tools and reducing device complexity.

A modular head assembly uses a linear locking set screw system to engage rods with bone screws.

An alignment tool guides fixation screws through an intramedullary nail to prevent fragment rotation and backout.

An expandable interspinous process spacer uses scissor-like legs and a fastener system to adjust height.

A wedge-shaped spacer and osteotomy guide correct knee alignment angles.

Percutaneous anchor extensions guide flexible connecting elements to stabilize spinal motion segments while reducing tissue trauma.

Magnetic actuation rotates internal drive members to extend the implant, eliminating invasive surgical adjustments and reducing infection risk.

A polyaxial interspinous fusion device uses a zip-locking mechanism and ball-and-socket engagement for secure fixation.

A bone preparation reference guide provides a stable attachment to unprepared surfaces using cerclage cables.

Rotatable connectors and telescopic arms enable angular displacement to accommodate varying anatomical configurations while maintaining stable fixation.

An extravertebral support plate attaches to an interbody implant to provide secure fixation outside the disc space.

A patient-specific guide uses a monolithic contact surface to match femoral bone anatomy and a planar scale to indicate planned version angles.

Nested spinal towers with curved bends allow single-incision rod insertion, reducing tissue trauma while maintaining screw placement accuracy.

A photocurable polymeric resin system injects into bone sites and cures in situ via a diffusive light guide.

A surgical screwdriver system integrates a guide pin assembly into the carrier to enable adjustable depth penetration during pedicle screw insertion.

A detachable guide pin establishes a precise trajectory within bone tissue to direct surgical implants.

Pre-threading the set screw into the axial bore eliminates intraoperative occlusion and reduces operation time.

Radially movable tangs on a plate holder capture spinal plates, resolving the trade-off between device footprint and engagement stability.

A reconfigurable bone adjustment device employs a partial slot and threaded block to distribute stress, enabling full weight-bearing capability.

A trans-facet pedicle screw assembly uses a polyaxial spherical head and tulip seat to align spinal rods.

A spinal reduction apparatus uses a threaded knob and sleeve to adjust vertebral bodies.

Nested cannula and guide pin tools enable minimally invasive sacroiliac joint immobilization, reducing surgical trauma and recovery time.

A bone fixation device uses a locking mechanism to allow passive rod translation relative to the housing.

A sacroiliac fusion implant uses a transverse pin and plate to fixate the joint.

Plane-parallel rod surfaces enable uniform peripheral clamping, eliminating stress peaks and material deformation common in frictional interfaces.

Rack and pinion mechanism enables incremental length adjustments in surgical implants, reducing patient trauma from large incisions.

A spinal rod connector combines a C-shaped opening for easy loading with a closed portion for rigid fixation.

A polyaxial bone anchor coupling assembly uses a compressible spring retainer to secure the anchoring element head.

An adjustable holder positions a cutting tool guide on spinous processes to ensure precise implant alignment and reduce surgical time.

A method determines insertion axes for pedicle screws using a 3D organ model and intersecting planes to define precise entry points.

Nested inner and outer tubes clamp spinal screw heads to solve retention issues in minimally invasive osteosynthesis.

A polyaxial rod inserter tool aligns spinal rods for percutaneous insertion.

A prosthetic device featuring a flexible intermediate segment and stiff inserts for spinal stabilization.

A surgical screw integrates a sleeve stopper to mechanically support the locking thread and prevent pull-out.

A two-wire surgical method guides a cannulated implant through pre-drilled bone tunnels for precise alignment and secure fixation.

A modular uniplanar tulip assembly couples to a polyaxial bone fastener via an adapter and longitudinal slot.

Segmented spinal rods connect via a multi-function coupling mechanism that minimizes footprint while maintaining structural integrity during surgical placement.

A polyaxial cross connector uses a hook and ferrule to engage spinal stabilizer rods at up to 20 degrees of perpendicular angulation.

Elastic closing covers seal bone plate through holes, preventing soft tissue ingrowth and bacterial invasion while enabling easier device removal.

A calcaneal cross medullary plate combines intramedullary nailing with surface plating to stabilize bone fractures.

Segmented instrumentation and non-circular dowels correct neglected medial column alignment while maintaining fusion stability.

Expandable implant section couples to reverse countersink bearing surface, reducing pistoning and improving joint compression stability.

A convertible intramedullary femoral nail incorporates a proximal replacement interface and cement injection channels to enhance initial bone fixation.

Cannulated surgical tool featuring a slide assembly and screw jack to precisely control guide wire insertion and retraction.

Semi-spherical tulip head aligns spine rods at various angles, reducing procedure complexity.

Bonded cables in the intermediate section allow the nail to flex, resolving rigidity issues that impede bone healing.