Finger Joints TRIZ Cases

Segmenting the implant into press-fit components prevents rotation and reduces non-union rates in hammer toe surgery.

Hollow frustoconical rod matches bone elasticity, resolving strength-adaptability trade-offs to minimize stress shielding and promote osseointegration.

Resecting the humerus to create a concave articular surface eliminates scapular interference during adduction and prevents implant subsidence.

A unitary PEEK intramedullary stem integrates the ball-and-socket articulation directly into the implant body.

An intramedullary stem distributes antibiotics through controlled outlets along the medullary canal.

A patient-specific guide tool with directing flanges guides surgical implants into finger and toe joints.

A bone fixation plate uses a wave-shaped sagittal cross-section to create an angle-stable press-fit connection within the medullary canal.

Grafting a phosphorylcholine polymer layer onto UHMWPE prevents film removal under friction, maintaining long-term wear resistance.

Patient-specific guide tools with directing flanges enable precise implant placement, reducing tissue interference during minimally invasive joint repair.

Conical threaded locking members allow reversible conversion between arthrodesis and arthroplasty modes without full replacement.

A semi-constrained ball-and-socket implant anchors to the distal carpal row and thumb metacarpal for stable articulation.

Robotic milling creates custom bone shapes for secure cartilage implant fixation, resolving precision trade-offs in subchondral integration.

A crosslinked UHMWPE articulating layer bonded to a non-crosslinked securing layer on a porous metallic component.

Segmenting the spherical head allows insertion through a narrow aperture, resolving the trade-off between joint stability and range of motion.

Curved support surfaces on adjustable clamping members apply axial compression to correct joint deformities while preventing implant loosening.

A thumb joint prosthesis attachment member uses a locking pin to secure the connecting segment.

A bone joint implant uses a non-metallic wear surface to distribute stress across articulating components.

A dual-component metatarsophalangeal implant secures via a longitudinal plate and stem, reducing loosening and misalignment.

Segmented axles connected by a body portion replicate carpometacarpal geometry, resolving alignment complexity.

Ionic polymer interpenetrating networks combine hydrophobic thermosets with ionic groups to deliver stable lubricity and biocompatibility.

A one-piece artificial joint implant uses equidistant wave-like coiled spring elements to connect bone contact components.

Tessellated polyhedrons in the frame create controlled weak spots, resolving deformation risks while maintaining structural integrity.

A reaming tool uses an offset connecting piece to align the head straight with the trapezium bone axis.

A surgical implant uses an intermediate portion to displace anchoring branches from an introduction position to a secure anchoring position.

Silicone rubber spacer with textured secondary surface distributes load across bone cavity to eliminate stress concentration from rigid fixation.

An angled compression screw with a threaded leading portion and anti-rotational head provides stable fixation across small bone fusion joints.

An aspherical cup geometry shifts hip joint contact from a point to an annular band, improving fluid lubrication.

A finger joint implant uses a bone shield to protect surrounding tissue from ingrowth while maintaining stable anchorage.

A flexible prosthetic device positions between joint surfaces using encapsulated internal bearing structures for articulation.

A modular proximal interphalangeal joint implant uses swappable articulation components to adjust constraint levels without removing bone stems.

Segmented button, cap, and screw design prevents positional shifts through asymmetric tang retention and concentric spherical alignment.

An internal ball and socket mechanism eliminates percutaneous pins, preventing pin tract infections while maintaining fixation stability.

Microporous pyrocarbon coating on graphite substrate matches cortical bone Young's modulus while thermal sprayed metal layer enhances attachment strength.

Asymmetrical metatarsal implant accommodates sesamoid bone movement during dorsiflexion, eliminating friction from raw bone surfaces.

Non-circular implant portions inhibit relative motion between bone parts, resolving inadequate healing and stability issues in joint treatments.

Peripheral protrusions prevent expulsion while elastic modulus matching minimizes bone erosion to restore joint mobility.

A sling suspension system connects thumb and index metacarpals using adjustable anchors to stabilize the digit post-surgery.

Segmented compression screw resolves fusion reliability versus flexion trade-off by enabling angled insertion across joints.

Inner holes in screw-like members enable secure bone attachment while socket and head members cover sharp edges to prevent tissue damage.

Radial fin-like anti-twist elements on a prosthesis shaft prevent implant loosening and twisting without hammering.

A prosthetic metatarsophalangeal joint implant uses a flexible spacer with embedded fibers between porous metallic anchors.

A rigid anchoring body paired with deformable arms adapts to varying bone hardness, reducing dislocation risk during arthrodesis.

A saddle-shaped interpositional orthopedic device distracts joint surfaces to restore range of motion and stability.

Composite outer portions with embedded fibers prevent bone penetration while providing structural strength and load distribution.

Plasma carburized surfaces reduce wear between metallic components, minimizing metal ion release and fracture risks in joint replacements.

Segmented bone screw with larger proximal section handles insertion torque without breakage, preventing distal migration that damages surrounding tissue.

Segmented intramedullary fixation assembly transmits torque to compress bones and restore the midfoot arch.

Segmented bone fixation implants use barbed tips to enhance tissue interference, preventing misalignment and infection risks from external wires.