Internal Osteosythesis TRIZ Cases

A bone fixation device uses a covering part to contain an expansion structure.

Adjustable interlaminar members maintain preselected spacing between adjacent vertebrae, preventing transition syndrome by stabilizing the entire spinal column.

Replacing mechanical guides with ultrasound imaging reduces device complexity and equipment expenditure during stabilisation element alignment.

Segmented expandable intervertebral fusion cage transitions from folded to expanded configuration for spinal support.

A sterilizable tray assembly with an adjustable targeting mechanism secures implant insertion devices to intramedullary rods.

An elastic inner core and flexible outer coil in a polyaxial bone screw resolve stability-mobility contradictions by enabling dynamic spinal support.

Segmented wedge implants expand the vertebral canal via elastic bone deformation, reducing surgical stress and postoperative complications.

Pivoting tie rods lock into a base plate to reduce bending moments and tensile forces during fixation of small bones.

Movable members in a spinal correction system adjust to offset bone fastener axes, reducing stress on interfaces while improving deformity correction precision.

Segmentation and intermediary joints isolate the adjustment mechanism from curvature-induced bending moments, preserving reliability during bone lengthening.

Spring tabs deflect elastically during insertion, then lock to secure spinal implants for stable fixation.

A pedicle screw and rod assembly uses a lordotic slotted rod to lock ball-shaped heads for secure multi-axial engagement.

A styloid nail features diverging insertion channels converging at a single point to enable multi-screw fixation through one bone hole.

Biased rails with spikes clamp onto vertebrae to prevent movement during pedicle screw insertion, resolving trajectory errors caused by vertebral flexibility.

A growing rod uses a gear rack distraction unit to extend the implant length via manual rotation.

Porous metal implants stabilize the sacroiliac joint by promoting bone ingrowth, addressing permanent relief limitations.

A spinal rod cross connector assembly uses polyaxial heads and set screws to clamp onto rods while allowing independent rotation.

A band clamp implant assembly secures flexible bands to spinal rods and bone using a locking mechanism.

Replacing rigid fusion members, the assembly employs an elastic spacer and bumper to absorb compression while maintaining anchor stability.

Movable coupling members on an occipital plate adapt to anatomical variations, reducing procedural complexity and invasiveness.

Coupling diaphyseal and periarticular plates reduces bulky cast size while maintaining immobilization stability.

Segmented bone ties bridge pars fractures with circumferential compression, correcting misalignment and promoting fusion.

A handheld bending instrument uses a gear assembly to apply precise force to surgical rods.

A split intervertebral spacer ring uses a posterior torsion spring to enable controlled vertebral motion.

A pedicle screw locking system uses a reduction tube and locking driver to secure spinal fixation components.

A vertebral connecting element uses recesses and filling bodies to adjust mechanical properties.

A hollow rubber cylinder expands between vertebrae while a pressure sensor monitors fluid levels to prevent over-distraction damage.

A bone screw head features a bidirectional recess that accepts a single driver tool for both placement and extraction operations.

A spinal rod reducing device uses a cam pin to pivotally move jaw members for secure bone screw engagement.

A surgical hook with a rotatable saddle member enables precise rod alignment during implantation.

Segmented drive and tapered retention surfaces prevent instrument disengagement during torque application while maintaining stable vertebral stabilization.

Percutaneous needle catheters inject augmentation materials into subchondral defects, reducing invasiveness while maintaining precise placement control.

Multiaxially oriented bioabsorbable plates enable intraoperative shaping through solid state drawing, resolving delamination risks in bone fixation.

Radial blades expand from a retractable shaft to engage cortical bone, eliminating cement leakage risks and improving screw purchase in osteoporotic spines.

A modular bone anchoring device with a deformable rod receiving member enables flexible positioning and locking configurations.

An expandable support device converts longitudinal compression into radial expansion for vertebral stabilization.

Instrument rotates vertebrae via bone anchor engagement, reducing stress on the interface and preventing anchor failure during derotation.

Rotational freedom between the bone anchoring element and rod prevents torque-induced loosening while maintaining stabilization strength.

Segmented cable anchors and pre-formed bone holes reduce surgical complexity while enabling measurable compression for fracture fixation.

A roller hinge integrates an adjustable seat within the axle to secure a panel hinge tab laterally.

An elongated slot guides a delivery device to advance flexible connecting elements, reducing tissue displacement during insertion.

A reduction tool assembly uses a rotatable insert with an off-center through hole to nudge bone fragments toward each other.

Segmented plate and carriage components enable dynamic screw adjustment, resolving the trade-off between anatomical adaptability and device complexity.

A bone alignment device couples to a polyaxial pedicle screw head to restrict rotational degrees of freedom.

A plastically deformable casing eliminates radial gaps between the screw and implant bore, preventing shifting without adding screws.

Segmented tulip assembly with elastic expansion prevents cross-threading and splaying during minimally invasive spinal fixation.

A biocompatible protective pad with a fluid pocket and bone anchors facilitates surgical access.