Internal Osteosythesis TRIZ Cases

Cutting edges on a conical bone screw tip create the thread path in bone, reducing skiving and extra instruments during angled insertion.

An implanted reservoir and fluid connection provide sustained joint lubrication without repeated injections, reducing infection risk and discomfort.

Smooth diameter transitions in a monolithic spinal rod reduce stress shielding and fatigue-prone joints while improving screw placement.

Movable members and elastic compression elements maintain fracture-site compression while limiting excess axial movement during healing.

An offset intramedullary-extramedullary implant enables precise hallux valgus correction through smaller incisions, reducing scarring and improving fixation.

A spring-loaded friction plug adds controlled resistance to a polyaxial pedicle screw, preventing flop and improving surgical handling.

Preconfigured guides align K-wires in olecranon fracture fixation, reducing imaging, operating time, and cartilage damage.

A cable-and-bead locking rodscrew bends through curved bone pathways, then rigidly resists load and torque for stable fracture fixation.

An eccentric coil rod, flat contact surface, and washer spread set-screw loads to preserve spinal motion and prevent fatigue fracture.

Modular sizing sleeves and caps enlarge the bone anchor footprint to limit housing movement and prevent dislodgment in weakened bone.

A motorized guide pin and hollow pedicle screw share one tool to drill accurately, avoid instrument exchange, and reduce screw misplacement.

A downwardly forced pressure insert and split retainer improve bone anchor locking stability while resisting pull-out during spinal fixation.

A locking band clamp secures and tensions flexible spinal bands to maintain fixation where wires loosen or pedicle screws are hard to place.

Cortical fixation through the femoral neck supports minimally invasive hip resurfacing while preserving the joint capsule and speeding recovery.

Cutting edges at the screw tip let it form its own path in bone, improving angled spinal insertion without extra preparation tools.

A threaded rotating mechanism lets the bone screw fixing rod change angle during spine surgery, reducing incision size and soft tissue damage.

An integrated anchoring body and internal drive expand the implant inside bone cavities to improve stability and reduce displacement risk.

Helical grooves and matched threads let a pedicle fixation screw anchor in bone cement yet be removed easily after vertebroplasty.

A tensioned anchor-and-notch coupling keeps the implant aligned during deployment and bone cement delivery, then releases cleanly for removal.

Pivoting wings and a telescopic connector reduce instrument interference and improve control during vertebral bone cement needle insertion.

Built-in load sensing, actuation, and ultrasonic communication enable precise bone lengthening without bulky external frames or pin-tract infection.

An FBG-based multi-core fiber cable tracks bone position without metal-sensitive electromagnetic sensing or invasive cortical pin placement.

A universal receiving part and locking member let one spinal rod coupling work with polyaxial or monoplanar bone anchors while cutting parts and inventory.

Force-sensing robotic arms align vertebral screws with spinal rods while limiting load to reduce breakage and shorten surgery.

Cutting flutes and a tapered neck let an IM nail bone screw countersink itself, reducing head prominence without extra drilling tools.

Carbon fiber reinforced PEEK pedicle screw constructs maintain spinal fixation while reducing imaging artifacts, radiation interference, and stress shielding.

A magnetic actuation assembly enables precise internal bone distraction or compression without external fixation, reducing discomfort and infection risk.

Threaded guide tube engagement and independent dilator control improve robotic implant placement accuracy while reducing manual positioning errors.

A recessed sacral anchor secures a spinal tether with compliance members to limit flexion while reducing nerve damage and spinous process erosion.

Anchoring the retractor to implanted pedicle screws stabilizes the working channel while preserving access to the intervertebral disc space.

A flexible anchor paired with a rigid member resists pullout while enabling iterative tension adjustment for stable bone fixation.

Separate height adjustment from screw locking so a spinal rod extension can connect securely without rotating on the pedicle screw.

Modular tulip heads, locking caps, friction rings, and clips improve pedicle screw strength, reduce splay, and secure rod alignment.

A breakaway screw tower keeps the rod slot open for adjacent screw intermeshing, easing percutaneous cervical rod insertion and reduction.

Ultrasonic transducers enable non-invasive implant sensing plus bidirectional transcutaneous data and power transfer through tissue.

An adjustable bridge plate and retractor align and stabilize displaced sternal fragments through minimally invasive distraction and compression.

Telescoping, pivoting, and angled retractor blades improve access and maneuverability in complex spinal surgical sites.

Ultrasonic transducers enable adjustable implants to exchange power and bidirectional data through tissue for accurate in vivo measurement and control.

Multi-plane articulated patient supports improve spinal access and stabilization while helping surgeons work from different pathways with fewer positioning injuries.

A three-position pressure element clamps and locks the bone anchor head with fewer parts, simplifying surgical handling and lowering cost.

Integrated navigation, multiple robotic arms, and a moveable base improve line of sight, alignment, and simultaneous surgical tasks.

Offset-head non-threaded anchors move transversely in implant apertures to create bone compression or distraction without screw backout.

A dome-shaped beveled screw head enables flush bone implantation at oblique angles, reducing skin irritation and infection risk.

Flexible pressure sections and inclined surfaces create head pre-load for stable friction fit, easier rod alignment, and secure fixation.

A flexible, expandable spinal implant restores vertebral height while supporting bone ingrowth and less invasive treatment of compression fractures.

An expandable anchor with deployable teeth creates a press-fit in pedicle bone to reduce loosening, pullout, and micro-motion.

Preoperative 2D and 3D spine modeling calculates a patient-specific pedicle screw rod shape to improve alignment accuracy and shorten surgery.

Force-sensing robotic arms align vertebral screws with a spinal rod while limiting load to reduce breakage and shorten spinal surgery.

Guide holes in a trial cage enable vertebral bone tunnels and cement filling before disc insertion, reducing settling and endplate fracture.

Interconnected implant links expand with adolescent skull growth while maintaining stable cranial fixation and protection.

A rod reducer uses a pivotable plate and slidable sleeve to grip spinal implants.

A shapeable porous metal implant conforms to patient anatomy during surgery to support bone fusion and ingrowth.

Asymmetric elastic design enables posterior implantation between facets, avoiding anterior neurological risks and thin bone damage.

Segmented bone anchor legs with breakaway extension members enhance visibility during minimally invasive surgery while maintaining structural strength.

A lumen-forming tool creates curved holes in vertebral articular processes to anchor facet joint prostheses.

Two-part tubular elements align vertebrae via sliding rods and external nuts to maintain precise spinal curvature during surgical implantation.

Interwoven monofilaments form a dynamic lattice that resists screw loosening in osteoporotic bone by adapting to hole variations.

Rotatable cord holder isolates tension adjustment from the connector, preventing mechanical twisting during inter-metatarsal angle correction.

Segmented tether uses nested fastening portion to adapt to bone contours while maintaining secure retention of intramedullary implants.

A spinal implant uses a distal plate that rotates after insertion to lock adjacent vertebral bodies in place.

Segmented coupling devices with asymmetric geometric features ensure absolute parallel alignment of medical instruments during spine stabilization procedures.

Threaded wedge implant eliminates supplemental screws, reducing infection risk while promoting bone fusion.

Segmented percutaneous access using nested hollow tubes reduces tissue trauma and recovery time during minimally invasive spinal surgeries.

A segmented spinal adapter resolves tight-space assembly complexity by providing universal connectivity and adjustable positioning via snap and drag retention.

Deformable forks encase a spinal rod to secure an elongate element, preventing abrasion wear while allowing post-implantation tension adjustment.

Intermediary reinforcing members stabilize fractured ribs, eliminating pain from wire contact with neurovascular bundles.

Flexural cuts in a hollow distal stem allow physiological stress transfer, preventing bone resorption caused by rigid high-modulus implants.

Randomized porosity in a pedicle screw scaffold mimics trabecular bone to promote osteoblast growth and enhance pullout strength.

Sensors measure impact force and deformation during femoral stem insertion, providing an indicator of bone-implant contact to prevent over-impaction.

An intra-medullary implant uses a movable slide and elastomeric tensile member to apply sustained elastic tension across bone fractures.

Bidirectional motor control resolves uncontrollable growth by enabling both lengthening and shortening while induction sealing prevents infection.

A rod link reducer assembly manipulates temporary rods via coupling clamps to correct spinal deformities.

Elastomeric core in flexible intervertebral implant absorbs mechanical load via visco-elastic dampening to restore natural spinal dynamics.

Segmented screw design with elastic limiting portions prevents loosening under stress, ensuring stable bone healing.

A compliant vertebral attachment device uses a curved flex structure to anchor securely to irregular bone surfaces.

A surgical instrument with a movable jaw transitions between fixed and movable orientations to attach spinal connectors.

An implantable release mechanism transitions between locked and release positions to reduce excessive tension on vertebral tethers during patient growth.

Anisotropic prosthetic implants with viscoelastic properties reduce stiffness mismatch between metal components and bone tissue, mitigating stress shielding.

Reversible rack-and-pinion mechanisms enable compression and distraction modes, resolving limited versatility in single-function orthopedic tools.

Segmented rigid plates and flexible porous structures resolve strength versus adaptability contradictions in curved bone fixation.

Segmented implant bridges occipital condyle and C1 lateral mass via endonasal route, eliminating staged posterior surgery.

A spinal implant holder uses a deflection device to route braids for posterior tensioning, avoiding lateral muscle dissection and reducing invasiveness.

Collapsible tabs on lateral mass fixation members enable secure attachment to vertebrae, reducing soft tissue trauma during minimally invasive cervical fusion.

Magnetostrictive element expands to lengthen bone segments, eliminating intra-corporeal electronics and reducing torsional breakage risk.

Segmented bone plate units link via pins and holes to fit skull defects, eliminating material waste from machining.

Segmented cortical allografts resolve the strength versus osteoinduction trade-off by combining load-bearing cores with demineralized surfaces.

Segmenting the implant into a low-profile base plate and a three-dimensional tension band distributes abductor forces without irritating the iliotibial band.

An implantable magnetic growing rod adjusts length through non-invasive actuation, reducing surgical frequency.

A toggle lever mechanism secures a screwdriver instrument to a bone screw extension device for minimally invasive spine surgery.

A hybrid interspinous fusion device uses a spring-like hinge to maintain axial loading on bone grafts during spinal stabilization procedures.

A spinal connector couples fixation elements using a stud and clamp assembly that locks degrees of freedom.

A polyaxial screw locking cap with an external helical thread engages the orthopedic component hole to secure the fastener.

Segmented connectors adjust rods in coronal and sagittal planes, preventing rod weakening during complex spinal fixation.

Offset flexible actuators deform to increase distance between components, securing bone segments without rigid structural constraints.

A PEEK coating shields a fiber-reinforced polymer bone implant surface from wearing interactions, preventing particle shedding that mimics contamination.

Segmented connectors with pre-formed hooks reduce surgical time and hardware requirements while maintaining fixation stability.

Radiolucent PEEK substrate couples to a radiopaque titanium securing component, enabling clear radiographic assessment of bone fusion and osseointegration.

Segmented arcuate blades attach to pedicle screws, creating a stable working channel that reduces tissue disruption during minimally invasive spine procedures.

A cannulated guide integrates an endoscopic camera to visualize bone alignment during intramedullary nailing procedures.