Fasteners TRIZ Cases

Self-threading screw heads engage radiolucent plates to resolve inclination trade-offs, eliminating auxiliary bushings and reducing device complexity.

Resilient two-point engagement extracts cannulated screws without breakage, resolving hardware failure and infection risks from lost purchase.

Segmented screw hole threads with varying heights allow multi-angle insertion, resolving bone shape adaptability versus manufacturing precision trade-offs.

A segmented orthopedic plate stabilizes foot and hand bones during osteotomy by combining a tapered insertion edge with raised rails that resist torsion forces.

A hollow shaft with a ball joint allows rotation and pivot movement for stable bone fragment compression.

Integrated pusher and drill guide merges functions to reduce device count in limited surgical space while preloaded washer prevents loss.

A surgical pressing tool uses a movable spherical head to apply precise compression forces against bone surfaces.

A securing screw features deflecting portions that undergo inward deflection during insertion to provide a secure fit within the implant hole.

A compression bone screw uses differential thread pitch to push adjacent bone portions together.

A wire stretcher apparatus stretches Kirschner wires through retainers to apply tension.

A surgical locking screw uses a variable thread diameter to provide secure fixation for bone fragments.

Double helix plate threads and conical screw heads enable angled insertion without compromising locking reliability.

A bone fixation apparatus uses a fastener passing through a V-shaped opening to interconnect extramedullary and intramedullary components.

Alloying magnesium with iron and zirconium reduces breakage while maintaining biodegradability.

Polygonal locking holes with circumferential thread interruptions increase dynamic compression translation distance to prevent screw loosening.

Aperture with out-of-phase upper and lower protrusions enables variable angle fixation element insertion for bone fracture stabilization.

A porous intraosseous screw uses a lattice structure to enable bone reconstruction and blood irrigation.

Asymmetric rectangular geometry increases surface area to prevent tearing in degraded bone during tension loads.

An interference zone in the opening prevents screw backout while accommodating bone graft compression.