Internal Osteosythesis TRIZ Cases

Merges decompression, stabilization, and fusion functions via a unified posterior approach to reduce surgery time and patient morbidity.

Segmented receiver arms with matching recesses allow flexible instrument prongs to lock securely, preventing dislodgement during torsional screw placement.

A segmented fixation device spans multiple joints and anchors in subchondral bone, preventing migration and non-unions common with K-wire fixation.

Segmented dual-drive screws resolve fixation strength versus surgical complexity by enabling precise compression control.

Segmented fixation components with polyaxial adjustability resolve sacral screw loosening by distributing mechanical loads across multiple anchor points.

An expandable working head navigates small incisions then deploys a wide surface to manipulate complex bone fragments without open surgery.

Rolling-contact cores and flexures enable three-axis motion, reducing stress on adjacent segments while maintaining stability.

A spinal connector rod features a fastener head with spaced walls defining a recess to receive an alignment rod for direct intraoperative manipulation.

An elastic rod assembly connects pedicle screws to permit physiological compression and extension, preventing nerve pinching caused by rigid immobilization.

Expandable inserts in an intramedullary nail lock bone screws through radial constrictive pressure, eliminating bushings that cause loosening and debris.

A nested piston and bellows mechanism enables an expandable spinal implant to transition from a compact delivery state to a deployed support configuration.

A surgical guide device channels elongated members through small incisions to enable precise percutaneous placement.

A porous bone filling material forms by mixing a gaseous substance into flowable cement to create an injectable augmentation structure.

A U-shaped implant assembly with a helical locking mechanism stabilizes the facet joint.

A bone nail trailing end uses a smooth waveform surface to transmit forces while eliminating sharp edges that irritate soft tissue.

Bilateral cross-links distribute stress across vertebral bodies to reduce neurological strain and prevent rod bending in spinal stabilization.

A retaining mechanism prevents contraction of an expandable implant, restoring intervertebral space while allowing natural vertebral movement.

Segmented sleeve channels fluidizable polymer into osteoporotic bone, preventing implant shifting.

Anterior iliac screw fixation eliminates pressure soreness while maintaining mechanical stabilization and promoting bony fusion.

A posterior disk augmentation system uses an adjustable compression body to reduce load on natural spinal disks.

Optical encoding replaces Hall-effect sensors to resolve quarter-turn ambiguity in surgical stapler drive shafts.

A multi-start thread closure assembly distributes force evenly, preventing component splaying during tightening of bone anchoring devices.

A spinal rod reducer uses a rotating shaft to drive linear anvil movement for precise bone screw alignment.

Nested bone anchors extrude from the screw tip to increase axial pull-out resistance without enlarging the surgical profile.

Locking caps with bearing surfaces secure elongated rods within polyaxial bone anchors for spine stabilization systems.

A helical distractor uses an internal advancement screw to drive a movable foot along a twisted path.

A rod-like construct with multiple bores at compound angles allows adjustable alignment and fastener placement to enhance stability.

Bottom-loaded modular head assemblies allow polyaxial or uniplanar configuration changes without removing implanted screws, preserving bone integrity.

Nested actuator and lead screw assembly minimizes device length for pediatric use, preserving internal volume for electro-mechanical systems.

Fluid actuator maintains precise tether tension despite bone movement or elongation.

A spinal rod reduction device uses pivoting arms and a translation anvil to align and insert rods into bone anchors.

An inertial sensor unit replaces optical navigation to track acetabular cup orientation, reducing invasiveness while maintaining measurement precision.

Nested sleeves inside a robotic end effector accommodate varied screw sizes, resolving compatibility limits of fixed instruments.

A fusion cage integrates a fixing plate guided by pivoting and restraining means for secure anterior attachment.

A spinal implant cap pivots a fixation rod from longitudinal to perpendicular orientation within percutaneous access tubes.

Leaf spring body with wire straps anchors between spinous processes to maintain spinal stability after decompression surgery.

Surgical instrument elliptical lobe drive geometry engages bone fastener head interface to establish rigid coaxial connection.

Motorized torque delivery replaces manual screw insertion, reducing surgeon repetitive motion injuries while maintaining high precision.

A bone preparation instrument moves a guide wire relative to its distal end for precise surgical positioning.

A bendable pin assembly with side holes injects medication and bone cement directly into fractured bones through percutaneous insertion.

Actuator assembly rotates movable arms from undeployed to deployed configuration, enabling minimally invasive implantation through smaller incisions.

An anterior cervical plate integrates a rotating lock mechanism that prevents screw backout and reduces instability without increasing tissue irritation.

A sacral reconstruction fixation device uses rotatable parts that lock against rotation and longitudinal translation to secure spinal and transiliac rods.

A telescoping vertebral stabilization device uses nested frame members to adjust distraction forces on the spine.

A medial buttress construct with anatomically matched support and attachment parts stabilizes femoral neck fractures.

Segmented openings and an intermediary valve member resolve leakage and excessive insertion force in gastric balloon fluid management.

Segmenting anchor placement from stabilization member insertion reduces soft tissue damage and blood loss while maintaining reliable vertebral fixation.

A bottom-loading polyaxial ball and socket fastener uses a spring clip to secure bone screws within a U-shaped connector assembly.

A vertebral spacer uses a spring-loaded gripping mechanism to securely hold screw head portions within accommodating holes.