Internal Osteosythesis TRIZ Cases

Rotating eccentric annulus prevents screw back-out by covering the fastener head, ensuring stable fixation during cervical fusion procedures.

Oblique installation pins in a guide module increase coupling force to prevent slippage and ensure proper bone alignment during osteotomy procedures.

Segmented pedicle screws distribute derotational forces across vertebral segments, reducing fracture risk while preserving lumbar motion.

A D-shaped flexible guide rod engages a complementary interior channel to constrain rotation during device insertion.

Hybrid dry cutting and hydrostatic burnishing adjust magnesium-calcium alloy degradation rates to match bone healing, eliminating stress shielding.

A dual pivot spinal reduction instrument applies longitudinal force to seat fixation elements into bone anchors.

Tensioned cable anchors replace screws to stabilize osteopenic bone fractures while eliminating complex screw inventory requirements.

Sidewall retention elements prevent rod slippage in bone anchors, streamlining surgical procedures.

Offset interdigitating protrusions extend into a bone ingrowth cavity to increase adhesion surface area while maintaining structural rigidity.

Segmented polyaxial screws with derotation tubes resolve axial balance issues by enabling simultaneous three-plane correction.

A cable retaining insert provides angular stability and guides cerclage wires within a bone plate assembly.

Multi-axis adjustment mechanisms enable precise rod seating, reducing procedure time and complexity compared to traditional approximators.

Solid sleeve-like insert piece maintains structural strength while compressible cap member allows bone anchoring element to pivot up to 360 degrees.

Cap rotation engages compression ramps to lock screw trajectory, preventing back-out without increasing device complexity.

Segmented end cap design manages load distribution across the bone interface while maintaining secure attachment stability through dynamic angular orientation.

A dual screw sacral plate with pre-configured cavities guides multi-axial fastener insertion.

Interlocking pin and lock screw components prevent disassembly of expandable bone plates, resolving insecure interconnection risks during implantation.

Longitudinal bone slots allow implant side elements to nest securely, preventing loosening by increasing remodeled bone volume.

A modular bone fixation tower uses flexible sections to accommodate anatomical variations during minimally invasive surgery.

A spinal bone anchor attachment device expands laterally to increase surface area interaction between the pedicle screw and cortical bone.

Asymmetric expandable dowels prevent back-out in variable bone density, ensuring reliable arthrodesis without complex threading.

Nested rotatable locking elements minimize foreign body sensation while ensuring reliable bone screw fixation.

Resilient locking member rebounds over inserted fastener, preventing backout that causes tissue injury and implant displacement.

Integrated elongate member eliminates separate locking mechanisms to improve stabilization reliability while reducing device complexity.

Nested fusion plates and snap-lock fasteners reduce hardware profile in modular spinal cages, enabling spacer removal after bone fusion.

A magnetic distraction system applies controlled forces to correct spinal curvature without fusion hardware.

A remote spinal manipulator uses a flexible cable to transmit control forces, enabling simultaneous anterior and posterior spine manipulation.

Nested balloons expand via light-cured fluid to restore disc height and prevent spinal deformity in degenerative conditions.

Curved pedicle nail shank with external bone threads prevents windshield-wiper loosening and pull-out in poor bone quality.

A breakable spacer clip holds the head element and outer sleeve in position during insertion.

An expandable barrel angulates plates to engage spinous processes, resolving the trade-off between structural stability and vertebral distraction.

Connector portion inserts through existing pedicle screw heads to secure spinal rod extensions with a low-profile design.

A polyaxial bone anchor uses a two-position saddle assembly to snap onto the threaded screw portion for flexible rod insertion.

A segmented bone implant connects to a removable driver assembly for precise insertion into adjacent structures.

A remote-controlled injection device uses a coaxial stepper motor to drive the injector for precise bone material placement.

An asymmetric cross-section rod creates a form-fit connection with receiving parts to resist rotational slipping and enable higher corrective forces.

A multilevel spinal compression instrument uses a pivoting coupler to position three arms for simultaneous vertebral adjustment.

Curved short handle with porous metal sleeve and lag screw retains healthy bone while ensuring long-term stability.

Segmented bone plates stack to expand outward, fixing fractures while avoiding large surgical wounds and tissue damage.

Segmented nails with self-locking interference features secure bone fragments without secondary removal surgeries.

Varying groove angles in the cannulated body prevent cable collision with channel walls, reducing tissue damage during orthopedic surgery.

Transverse connectors integrate osteoconductive material on rod receivers to resolve the contradiction between mechanical stability and fusion reliability.

Angled DTS guide wings abut spacer surfaces to align fastener channels, preventing misalignment during spinal fixation.

Radial strut deployment of an expandable hip implant reinforces osteoporotic bones while avoiding soft tissue damage from invasive procedures.

Slidable blade arms and plate support assembly minimize tissue creep and displacement during multilevel anterior cervical spine surgery.

A multifunctional spine inserter advances an implant holder via a drive shaft and automatically releases the device through pivoting arms.

Helical grooves in the lag screw shank engage sliding blade legs to prevent loss of reduction and rotational failure during hip fracture treatment.

Flexible collet drivers engage uncoupled bone screws, reducing inventory complexity and setup time.

Inflatable orthopedic implants use pneumatic expansion to safely separate vertebral bodies, preventing fracture risks associated with mechanical spreaders.

A surgical insertion instrument uses a rotatable engagement member to secure implants during bone deformity correction procedures.