Internal Osteosythesis TRIZ Cases

A nested fastener and set screw create adjustable spinal fixation, reducing rod dependence, component count, and loosening risk.

A reducer clip, threaded handle, and rotating shaft improve rod reduction while aligning setscrews with pedicle screw threads.

An external magnetic field rotates the rod assembly to adjust pedicle-screw spacing and support dynamic spinal alignment.

A computer-controlled, multi-segment table coordinates spinal access and stabilization while supporting parallel surgical workflows.

See how a tapered bone plate and aligned aiming guide support precise distal femur fixation through a minimally invasive approach.

A plate insertion tool bends legs into guide holes, while a separate tensioning tool maintains force during screw fixation.

An integrated anchor and actuation screw uses axial, not rotational, coupling to adjust distraction while reducing percutaneous sites.

Modular spinal bone anchors use offset receivers and distributed clamping to address screw migration, cord breakage, and overcorrection.

A deflectable spring stabilizes tulip extensions while allowing support-ring removal.

A screw-driven tensioner tightens knotted fabric thread around bone while reducing wound size, tissue damage, and metal snag use.

This case combines expandable interbody and intradiscal fixation implants with robotic guidance to limit imaging and placement errors.

This case uses magnetic or mechanical spring actuation to maintain distraction force in telescoping growing rods without repeat surgery.

A segmented bone plate with fixed and polyaxial holes supports precise fracture fixation while reducing soft tissue disruption.

Bone screw capture elements improve retention during minimally invasive spinal fixation.

A foldable interbody spacer expands after insertion to increase endplate contact and hold bone-growth-inducing material.

A flexible band and dual-channel clamp separate band locking from rod locking for adjustable pediatric spinal fixation.

Variable-width threads, undercuts, and helical flutes improve bone fixation while reducing migration and cutout risk.

Friction retention and aiming guides help prevent screw backout, rotation, and alignment errors during intramedullary fracture fixation.

A movable tack and oblique spring-biased plate lock a guide wire for fracture alignment and compression with fewer incisions.

A screw tower tool converts button rotation into controlled driver-shaft movement, easing time-consuming spinal rod reduction.

Magnetic coupling controls intramedullary bone distraction and rotational alignment.

A reference block uses detachable compensation elements to restore the posterior condylar line for precise knee implant alignment.

Contoured plates and angled screw openings help secure periprosthetic fractures around existing orthopedic implants.

This orthopedic kit combines screw insertion, rod reduction, torque control, and release functions to reduce instrument changes.

This ankle fixation cage balances structural strength and bone ingrowth with segmented porosity and patient-specific 3D printing.

A strain-gauge set screw measures and wirelessly transmits connection force to detect loosening in spinal implants.

This case uses posterior ligament lines attached to soft tissue to stabilize multiple spinal levels without segmental bone anchorage.

Press-fit pedicle screw coupling reduces bulk while preserving rigid fixation.

A one-piece coupling member reduces jamming during nail insertion while improving lag screw control and mechanical stability.

A threaded, expandable implant adjusts vertebral distraction while maintaining spacing between spinous processes and laminae.

A releasable handle and cannulated shaft combine awl, thread-cutting, and K-wire functions to reduce surgical passes.

A fixation plate, tensioned bands, and surgical drain assembly address wire irritation, uneven positioning, and excess fluid.

A guided kit addresses unreliable sacroiliac fusion through stable implant placement.

Nested drive components reduce implant volume while enabling precise, non-invasive distraction and compression of bone segments.

Enclosed screw pockets isolate grafts while interchangeable arced surfaces support versatile insertion through multiple surgical approaches.

This case pairs band clamp implants with adjustable tensioners to maintain spinal correction when screw fixation is limited.

This fixation approach spans the disc space from an inferior pedicle, reducing superior facet violation and procedural morbidity.

A dual-loading spinal connector uses angled set screw openings to support minimally invasive fixation with less tissue exposure.

A convex rod-facing surface helps align spinal rods to pedicle screws while reducing lateral torque, stress, and cold welding.

A movable pressure element and rotating clamping element simplify friction adjustment and alignment of polyaxial bone anchors.

This case uses hinged lateral shield extensions to protect the spinal cord and dura while easing surgical placement and removal.

Registered imaging and tracked instruments guide vertebral distraction and compression for controlled spinal correction and stabilization.

This case uses elastic members, grooves, set screws, and bushings to improve clamp fixation and reduce post-surgical disengagement.

This dynamic bone screw uses elastic tension and torque transmission to retain compression and fixation during bone subsidence.

Resilient friction fit keeps a pivotal bone anchor aligned before final locking.

A rigid triangular bar assembly addresses difficult rod bending and screw loading while enabling stable 3D vertebral correction.

A movable locking member lets one receiving part support different bone anchors while controlling pivoting for flexible or fixed fixation.

Adjustable stems use channels and outlet holes for controlled antibiotic delivery, reducing surgical time while maintaining joint stability.

The coupling device uses an instrument-controlled locking ring to secure bone anchors in situ without pre-assembly.

Three spring arms and varying thread diameters improve fixation under tri-axial stress, while drive features support revision removal.