Internal Osteosythesis TRIZ Cases

Angled cap and receiver features prevent receiver arm splay during rod locking, yet allow intentional cap removal for spinal revision procedures.

A preformed curved cannula creates a predictable path through vertebral bone to accurately place nerve treatment devices despite varying bone densities.

Flexible extension wings replace bulky cylindrical screw extensions to preserve surgical access while reducing incision size and tissue damage.

Integrated guide tips replace separate needles, guidewires, and taps to enable faster bone anchor placement with less fluoroscopy and dislodgment risk.

A coaxial tab breaker with nested shafts and guide-rod alignment removes bone anchor reduction tabs in tight minimally invasive access.

Thermoplastic rings isolate metallic sliders to cut wear and corrosion while a shape memory member sustains bone compression across joints.

Adjustable arms, threaded collars, and swivels enable precise vertebrae compression or distraction while fitting varied spinal anatomy.

A keeper-based gear lock blocks back-driving under load while still allowing controlled rotation for implantable distraction or compression.

A deployable purchase element lets a spinal bone anchor secure rods in varied orientations while avoiding facet joint violation and extra steps.

A rotating, uni-planar bone anchor aligns the fixation rod while keeping screw depth unchanged and avoiding screw advancement or withdrawal.

A rotating outer sleeve and expandable cage enable minimally invasive vertebral fixation with controlled compression or distraction.

Radial expansion inside the pedicle creates a bone press-fit that improves fixation stability and lowers loosening and pullout risk.

A spring-preloaded interspinous plate structure stabilizes spinous processes with adjustable fixation while preserving vertebral motion and easing surgery.

Alignment-indexed fixation guides improve bone reduction accuracy in Lisfranc and Lapidus procedures while supporting minimally invasive screw placement.

A frangible spiral tether guides bone growth to correct rotational deformities without osteotomy, reducing pain, infection risk, and recovery time.

An interference-fit male-female coupling with engagement teeth reduces implant bulk, eases spinal construct assembly, and prevents cross-threading.

A bottom-loaded shank, ring retainer, and twist-in-place insert secure polyaxial bone anchor orientation while reducing implant profile and assembly complexity.

A block-and-base guide system helps shorten bone with controlled gap reduction, accurate fragment alignment, and stable fixation.

A magnetically driven lead screw enables precise extramedullary bone distraction or compression while avoiding pin-tract infection and canal-space limits.

Selective endplate removal and posterior fixation improve spinal alignment, limit implant migration, and support bone fusion.

Force-guided robotic screw insertion maintains the planned spinal trajectory while matching rotation and advancement to thread geometry.

IR screw tracking and digital bend planning replace iterative manual rod shaping, improving spinal correction accuracy and reducing OR time.

A slidable spring-biased insert lets a spinal rod reducer switch between rapid reduction and driving modes while cutting twisting force and fatigue.

A translating lock sleeve stabilizes bone anchor extended tabs, prevents proximal separation, and improves manipulation in minimally invasive spinal surgery.

A fiber-reinforced resin core with a flexible coating layer maintains spinal rod rigidity, avoids MRI image disturbance, and limits fiber exposure.

Three independent translation stages guide tibial and talus positioning in total ankle replacement to improve alignment, stability, and articulation.

A constricting locking tube clamps K-wires quickly to maintain fracture reduction, avoid plate interference, and support intramedullary fixation.

CT-based 3D humerus modeling enables anatomically matched plates and nails that improve fit, fixation stability, and bone-device loading.

Segmented internal diameters act as fluidic diodes, enabling guide-wire insertion and controlled bone cement release with less backflow.

A fiber-reinforced resin rod with embedded high-elongation metal reinforcement improves MRI compatibility, rigidity, and breakage safety.

A porous layered implant placed between sternal halves improves compression, alignment, and growth factor uptake to speed bone fusion.

Temporary receiver extensions fracture away after rod fixation, preserving spinal stability while reducing soft tissue exposure in less invasive surgery.

A recessed, movable pressure member enables repeated unlocking and relocking of a bone anchor head for precise intraoperative correction.

A threaded sleeve drives longitudinal shaft motion to speed rod reduction, ease screw connection, and limit soft tissue force.

Integrated detents, guides, and a retainer keep lumbar plate retention caps over bone screws to prevent backout while easing assembly.

A biasing member creates friction between the receiver and bone screw head to prevent drooping and simplify spinal rod alignment.

A collet coupling, sleeve, and collar set screw simplify spinal rod fastening while keeping a low-profile assembly for minimally invasive fusion.

Cross-locking anchors and a ratcheted guide sheath improve screw alignment, resist rotation, and reduce cutout during nail implantation.

Ultrasonic vibrations tied to implant expansion replace slip-prone magnetic monitoring, enabling precise adjustment measurement without radiation.

Bi-directional transvertebral screws and guided sliding boxes strengthen spinal fusion while reducing blood loss, tissue retraction, and injury risk.

A ratcheting one-handed clamp integrates cerclage cable guidance to reduce extra exposure, muscle stripping, and blood loss.

Telescoping and ramped pedicle screw sections enable in-place height adjustment for rod alignment without backing out the anchored screw.

Mechanical stress in a modular nail is converted into electrical stimulation to promote bone regrowth and reduce delayed union.

Flexible tulip clips and a ramp-guided drive shaft speed spinal rod seating while improving fixation reliability and surgical handling.

Oblong screw holes let a dynamic bone plate compress the pediatric growth plate, reducing invasiveness and speeding inactivation.

A tool-coupled spacer and plate are inserted together, then decoupled in situ to preserve implantation flexibility without added surgical steps.

Pivoting rails, dual handles, magnets, and a lock help separate spinal anchor tabs with lower force while keeping the tool stable.

A compression insert and dual locking structure keep a polyaxial bone anchor aligned and secured despite creep deformation and thin closure walls.

A locking split tower secures to the bone anchor head, then releases cleanly to improve visualization and reduce extra handling in spinal surgery.

A ratchet and lead screw retract the stylet automatically during bone anchor insertion, improving one-handed control and reducing screw interference.