Joint Implants TRIZ Cases

An oblique opening axis and internal support beams help a spinal fusion implant resist deformation while promoting bone ingrowth.

A compact metallic anchoring portion seals the polymer joint cap from the porous layer while preserving bone regrowth.

A reinforcing core and antibiotic-impregnated cement support stable intramedullary spacer placement while treating implant-site infection.

See how a clamp-based knee instrument maintains a midpoint reference to align with the tibial mechanical axis and limit parallax errors.

A cartilage-trimming tool and press-fit substrate protocol position implants below the articular surface to support stable tissue growth.

Manual augment placement can extend surgery and reduce accuracy; robotic planning and probe checks support precise cup impaction.

Central and anterior protrusions use press-fit, form-fitting, and force-locking features to limit micromovements between the tibial tray and insert.

A movable coupling lets tibial and meniscal components join parallel to, then perpendicular to, the contact plane without overstretching ligaments.

Fins, angled arms, and optional bone anchors provide immediate tibial implant stability before bone ingrowth occurs.

An inclined tibial seat and posteriorly inclined femur adapt the implant to animal anatomy while accommodating joint gaps.

Adjustable inclination and anteversion guide rods help position and impact the acetabular cup accurately during reverse hip prosthesis implantation.

Compressible spring lobes let a modular nucleus replacement mimic disc loading while interconnected segments resist displacement and preserve spinal motion.

Inserted in a contracted state, a translating wedge expands the cage in situ to restore disc height and stabilize the spinal segment.

A flexible posterior plate lets a cervical cage adapt to spinal motion, maintain uniform endplate contact, and limit subsidence.

Localized antibiotic delivery and a reinforcing core help stabilize infected bone while a customizable spacer fits the medullary canal.

A single externally threaded shaft drives proximal and distal wedges, simplifying actuation while adjusting vertebral spacing and plate inclination.

Flexible and magnetic damping components dissipate impact forces in prosthetic joints, helping reduce wear, particulate debris, and implant loosening.

Independent inner and outer shafts let one driver handle intervertebral implant expansion and collapse without separate rotational tools.

Variable-radius articular surfaces constrain superior humeral translation, helping restore shoulder stability while preserving physiological motion.

Single-angle ramps, rails, and a drive screw enable controlled height and width expansion for minimally invasive interbody placement.

An asymmetric groove guides O-ring expansion and contraction, securing the taper while reducing removal force and protecting its surface.

A preassembled reverse glenoid implant combines baseplate, screws, taper, and post to simplify alignment and improve fixation.

A universal latch lets one handle secure knee-arthroplasty trials and sizers, reducing device count and sterilization complexity.

An adapter links the humeral tray and stem to limit healthy bone removal while supporting stable, cement-free fixation in reverse shoulder surgery.

Modified 3D Voronoi lattices control 0.5–2 mm pores and 60–85% porosity for bone ingrowth and structural integrity.

An internal hydraulic suspension system helps a vertebral prosthesis manage weight distribution, mobility, and natural spinal deformation.

A tunable lattice modulus deforms under joint loads to match bone strain, limit stress shielding, and encourage bone integration.

Independent actuators and translating members enable minimal-incision insertion, then adjust implant height and lordosis in situ for spinal fusion.

A helical base member and locking device secure cancellous-bone fixation for a stemless shoulder prosthesis while supporting wider humeral motion.

An adjustable fastener slot and coupling interface guide slap-hammer forces, helping remove tibial implants while reducing thread and tibial damage.

A drive screw and cam frame expand endplates after insertion, restoring disc height and stabilizing adjacent vertebrae for fusion.

Separate tibial, femoral, and spacer components combine into configurations for measuring and balancing joint gaps across knee replacement techniques.

Horizontal femoral-head grooves and ball bearings distribute loads across the liner, reducing friction, wear, and localized deformation.

Angled tibial posts, a removable fastener, and porous surfaces stabilize UKA implants while supporting long-term osseous ingrowth.

Flexible arms expand under expander pressure to adjust spinal curvature, while porous cavities support bone integration.

A modular anchor, baseplate, and implant assembly helps replicate native cartilage properties while supporting durable, comfortable glenoid repair.

A reduced insertion configuration helps articulating cages pass narrow access paths before expansion restores disc height and sagittal balance.

Universal spacer bores accept linear or curvilinear fasteners to secure implants where cervical anatomy limits conventional angled insertion.

Different pore sizes and interconnected struts support bone ingrowth while reducing stress-shielding and improving spinal implant stability.

Anterior offset and posterior angulation position the hip centre of rotation to expand motion and mitigate bone and implant impingement.

Adjustable shims on a 4-in-1 femoral cutting block compensate for cartilage wear and align resection to native knee anatomy.

Conventional implants need vertebral distraction; this ramped device inserts in a compressed state, then expands to maintain disc spacing and stability.

A T-shaped cutting slot guides a reciprocating saw for repeatable keel channels, reducing cortical bone interference and fracture risk.

Form-fit abutments let an insertion device pivot and lock an intervertebral implant at multiple angles for stable spinal fusion placement.

Polyethylene liner openings and grooves enable dual mobility while reducing metal contact, wear, friction, and adverse tissue reactions.

A pinned vertebral retractor guides interbody spacer insertion to preserve disc-space alignment, spacing, and natural spinal lordosis.

A swivelable handle and interchangeable drive connectors let one surgical instrument switch between reaming and impaction with less configuration complexity.

Static spinal implants can be difficult to maneuver; steerable controls enable orientation adjustment and expansion after insertion.

See how embedded magnets stabilize hip prosthesis components, addressing dislocation risk while limiting wear, corrosion, and motion restriction.

A proximal flange anchors below the humeral resection to stabilize fixation and keep the shoulder joint center close to the humerus.