Internal Osteosythesis TRIZ Cases

Nested wedge clutches lock return movement in a magnetostrictive implant, enabling high-force bone distraction within limited medullary space.

Orthogonal nails extend from rods to ribs, providing three-dimensional stabilization for spinal constructs.

Modular connector bridges existing and new spinal hardware via articulation, eliminating the need to remove original fixation during revision surgeries.

A self-locking spinal pinching system uses a ratchet mechanism to grip vertebrae securely.

Segmented slotted openings allow sliding engagement with locking screws, enabling stable periprosthetic fracture fixation without disturbing existing implants.

A surgical instrument latch mechanism engages spinal implants to bone fastener shafts via a locked actuator orientation.

Segmented driver design resolves adaptability complexity trade-off by nesting interchangeable buckets for secure spinal fixation.

Anti-rotation features on bone screw heads engage setscrew pockets to fix orientation, preventing screw rotation and vertebral body movement.

A surgical instrument uses a movable spacer element to hold abutment elements at defined spacing during intervertebral implant insertion.

A modular retractor assembly uses a ball and socket interface to rotate the medial blade for precise surgical positioning.

Conical rear external thread generates axial compression while tapered middle section prevents automatic twisting during insertion.

Flexible tensioning element passes through elongate fixation member to preload bone fracture in compression, resisting tensile forces across the fracture site.

Anatomical access holes indicate left or right placement while recessed screw holes allow micro-adjustments.

Segmented corrective rod applies sequential forces to realign vertebral members, resolving alignment precision versus surgical time trade-offs.

A central inflatable distractor and perimeter balloon create a horseshoe-shaped structural support within the disc space.

A removable stability element prevents warping and shrinkage in vertebral rods during injection molding, ensuring dimensional accuracy.

Fixation plate holding portion conforms to bone outer surface, preventing thin hinge twist during closing-wedge osteotomy.

Actuated expandable grippers deploy within the intramedullary space to stabilize fractures, reducing surgical trauma and infection risks.

A flexible obturator uses a multi-strand core overmolded with tapered material to dilate soft tissue in surgical procedures.

A cannula with a dynamically expandable working channel transitions between compressed and expanded states to facilitate implant delivery.

A dual-trajectory pedicle screw system secures auxiliary screws at multiple angles to increase fixation strength.

Segmented orthopedic plates reduce bending stiffness to stimulate bone remodeling and prevent stress shielding during osteosynthesis.

A tapered shaft removal tool engages tuliped pedicle screw channels to enable secure rotation and extraction.

Segmented interspinous stabilization device expands the spinal canal to relieve nerve compression without requiring invasive bone removal.

A washer assembly with coaxial internal channels adjusts cable tension to stabilize bone fractures.

A multi-axial occipital plate uses double swivel rod connectors to adjust position and orientation for precise anatomical alignment.

Spring-loaded collet mechanism in spinal connectors resolves the contradiction between reliable fixation and easy adjustment by dynamically locking rods.

Flexible sliding blades in articulated vertebral implants maintain physiological motion while correcting deformities.

A compliant dynamic spinal implant uses torsion to oppose motion and stabilize diseased segments.

A manipulation device with articulatable legs and a lock member transitions between unlocked and locked conditions for surgical instruments.

A band clamp implant assembly secures flexible bands to the spine using locking members and anchors.

Instrument breaks and retains reduction screw tabs using a pivot arm and housing, preventing debris from falling into the surgical site.

High-strength nickel-titanium alloys and parameter changes enable small cannulated bone screws to support larger guide wires, reducing breakage during surgery.

Spring-loaded rivets maintain compressive load between vertebrae, preventing screw loosening from anatomical forces.

A spinal facet fastener clamps vertebral bone segments to restrict flexion and extension, reducing pain from degenerative disc disease.

An expandable spinal rod transitions from a compressed insertion state to an extended functional length via hydraulic expansion, reducing surgical invasiveness.

A spinal fusion device uses a U-shaped load-bearing component mated to an anterior outer plate for stable vertebral fixation.

Central coupling eliminates nail protrusion, resolving structural weakness in prior art L-shape configurations.

Conical screw threads engage recessed nail holes to resist torsional forces without radiological guidance.

A multi-axial pedicle screw uses coaxial and non-coaxial drive interfaces to adjust bone penetration depth.

A lockable instrument assembly uses a shaped aperture and adjustment member to secure surgical components in precise positions.

A pivotal bone anchor uses a snap-fit assembly to secure the shank sub-assembly within the receiver.

Expandable connector members snap onto vertebral fasteners to reduce implant complexity while maintaining structural stability and alignment precision.

Segmented helical splines distribute load across cancellous bone, preventing thread shearing while promoting bone ingrowth through localized apertures.

Curved tracks enable infinite distraction adjustment via a single locking mechanism, resolving bilateral access complexity.

Tab extenders project screw heads to skin surface, enabling precise rod placement and secure locking despite limited surgical access.

Reciprocating scoring elements create fracture paths in spinal rods, eliminating burrs and tissue damage risks from excessive shearing force.

A laminar fixation clamp uses a clam-shell pivot to secure a spine rod while receiving a band around the vertebra.