Internal Osteosythesis TRIZ Cases

A screw-driven motion converter adjusts the outer diameter of an artificial hip joint stem to accommodate varying bone sizes.

Pre-shaped bends in the flexure limiting member constrain excessive spinal motion, preventing vertebrae misalignment and nerve pinching.

An external driver mechanism converts manual rotation into linear extension of a spinal growing rod, reducing surgical frequency.

Instrument measures tension via dynamometer to secure flexible ties on vertebrae, preventing spinal cord damage during fastening.

Segmented tulip head uses breakable shear clip to resolve strength versus complexity trade-off in spinal fixation.

Dynamic polyaxial design resolves orientation flexibility versus complexity trade-offs for precise fracture correction.

A femur fixation device uses a detachable positioning bracket to secure the hip screw within the intramedullary nail.

Recesses in a single-material tube reduce rigidity, resolving the trade-off between flexibility and device complexity.

An acute-angle intrabody implant secures osteotomized vertebral portions to maintain precise lordotic curvature and prevent bony subsidence.

Coupling two J-shaped members creates a continuous tube that reduces muscle trauma during bone fixation.

A dynamic bone fixation element uses additive manufacturing to merge sleeve and fixation member into a monolithic structure.

Segmented delivery system with nested components minimizes soft tissue interference during percutaneous posterolateral fusion procedures.

Bendable joints in an adjustable occipital plate allow individual arm angulation to accommodate anatomical variations while maintaining structural rigidity.

A dual tulip assembly uses arcuate fingers to secure a bone screw head while accommodating two rods.

A bone implant transitions between relaxed and contracted states to provide consistent compression for arthrodesis procedures.

A bone plate uses a combined threaded hole to drive a single screw for simultaneous fixation and compression.

Hinged arms attach to facet joints to stabilize vertebrae without large pedicle screws, reducing spinal nerve injury risk.

Segmented and nested expandable spacers stabilize spinal motion segments while reducing migration risks associated with traditional invasive implants.

Toothed connectors align resilient clamping elements to compress fractures, reducing production complexity.

Asymmetric design and stop mechanism center the plate, preventing rotation to reduce tendon irritation.

Nested barrel and peg components with a locking flange improve angular stability while preventing uncontrolled shortening in femoral neck fractures.

A stand-alone MTP joint fusion device uses a bone ingrowth matrix and intramedullary screw for secure fixation.

Self-retaining aiming guide sheath aligns fixation screws to prevent proximal fragment rotation and cutout in bone fracture stabilization.

An integrated posterior rod system merges distraction, compression, and fixation functions into one instrument set to reduce operating room complexity.

Segmented alignment devices with adjustable legs translate and rotate vertebral bodies to correct spinal deformities without post-fixation derotation.

A radiolucent guide tool with segmented securement seats and radiopaque markers aligns multiple implants.

Segmented bone marrow aspirate injection addresses post-surgical pain and recovery time by treating both subchondral and intraarticular regions simultaneously.

A rod cutter with interchangeable hexagonal cutters and a ratchet system for controlled cutting action.

A percutaneous band coupling device secures adjacent spinous processes using a tensioned elastic band delivered via a needle unit.

A spinal connector uses a sagittal adjusting saddle to accommodate vertebral angles.

Combining a bone anchor with a clamped flexible member stabilizes vertebrae despite compromised pedicle quality.

Modular anchor extensions and nested inserters enable remote engagement of connecting elements, minimizing tissue trauma and scarring during bone stabilization.

Positive locking mechanism prevents screw backout and reduces tissue damage during spinal stabilization surgery.

Magnetic guidance directs cross-connectors to spinal rods, reducing soft tissue damage and eliminating x-ray exposure during minimally invasive procedures.

Segmented vertebral implants with a tension cord resolve the trade-off between rigid stability and patient movement flexibility.

Self-aligning asymmetric geometry allows insertion without precise longitudinal alignment, eliminating infection risks from protruding wires.

A curved elastic plate presses posterolateral bone fragments to prevent separation and rotation, resolving instability in femoral trochanteric fractures.

A fixation screw assembly uses a polyaxial flexible washer to secure bone engagement against curved ilium surfaces.

A bone fixation screw receiver with convertible sides enables seamless transition between closed and open configurations.

A surgical screwdriver uses a homokinetic joint to transfer rotation between tilted shafts.

Segmented elongate members with pivoting retainers install vertebral anchors without extensive tissue retraction.

A compliant inter-spinous spacer reduces nerve root pressure by maintaining intervertebral spacing and distributing mechanical loads.

Software-configured control segments complex spinal procedures into discrete steps, preventing patient injury during delicate tissue removal.

An injectable composite implant assembles inside the intramedullary canal to stabilize fractures without invasive open surgery.

A locking device employs a posted member to distribute forces and reduce stress concentration at the interface of bone anchors.

An anterior pedicle screw placement system stabilizes the spine through a single surgical exposure, eliminating the need for a second posterior operation.

A convex interbody spacer with medially curved surfaces maximizes bone contact area for spinal fusion procedures.

An electro-mechanical intervertebral disc uses motor actuators to dynamically alter spinal disc height and motion.

Integrated cutting guide block with measurement scales resolves alignment precision versus device complexity trade-offs in revision knee surgery.