Joint Implants TRIZ Cases

Selective calcium phosphate coating on a spinal implant cuts antimicrobial agent use while preserving infection control, adhesion, and bone integration.

A pivoting arm, lever, and link mechanism improves implant gripping while keeping the extractor simpler to make and easier to operate.

An asymmetrical tray edge lowers reverse shoulder prosthesis onlay while preserving liner support, mobility, and mechanical strength.

An oblique lateral cage angle avoids anterior organs and lateral psoas nerves, simplifying spinal insertion and stabilizing vertebrae.

Extendable tabs and a coupled insertion instrument stabilize a spinal fusion cage during minimally invasive placement to reduce slippage and trauma.

An expandable spinal implant uses sliding body portions to fit minimally invasive delivery while holding more bone growth material for stronger fusion.

A movable spacer and porous nesting interface enable fast orthopedic instrument assembly with accurate fit and impact-resistant provisional fixation.

Sequential ramp-and-wedge expansion lets a collapsed intervertebral cage expand in situ for spinal stabilization and bone-growth support.

An anatomical femoral template and canal stem guide rotational alignment in knee arthroplasty, reducing positioning errors and ligament stress.

A porous core inside a cage lets the spinal implant compress under load while supporting bone in-growth and stable vertebral integration.

Counter-rotating upper and lower tools unlock a prosthetic head from the stem without impaction, reducing patient trauma during revision surgery.

A tunnel-guided single fastener secures the spacer to the lamina and lateral mass, cutting drilling steps and screw misplacement risk.

A combined implant and anchor inserter enables sequential placement between bony segments to improve fixation while lowering insertion force and fracture risk.

A cam-frame and drive-screw mechanism expands the spacer in situ to restore disc height, support vertebral fusion, and fit minimally invasive delivery.

A pivoting arm, lever, and link mechanism improves implant gripping and removal while avoiding the cost and complexity of harder-to-use extractors.

A radius-mismatched glenosphere and concave inlay add translational roll-slide motion to improve inverse shoulder prosthesis mobility.

Angled posts and a removable fastener stabilize unicompartmental knee reconstruction while preserving cruciate ligaments and bone.

Dual set screws and sliding frames adjust interbody spacing and endplate angle to improve stability and limit subsidence.

Movable plates and an actuator pin let intervertebral cages pass narrow access pathways, then restore disc height and lordotic alignment.

Elliptical condyle and trochlear surfaces mimic natural femoral geometry to improve knee stability and flexion while reducing patellar impingement.

Unequal resistance can misalign expandable spinal implants; a bevel-gear differential distributes torque between independent actuators for controlled adjustment.

Dual set screws and inclined ramps selectively adjust endplate spacing and inclination to improve spinal implant positioning stability.

CT-planned femoral and tibial templates guide bone cuts and implant alignment, reducing instrument complexity and the surgical learning curve.

Interchangeable inserts and a movable plunger let one mold form joint-prosthesis spacers in patient-specific heights and thicknesses.

Flush channels send cleaning fluid into porous implant material, removing trapped manufacturing residues before implantation.

A polymer knee implant uses a porous, stiffer bone-facing layer to support bone in-growth, load transfer, and fixation.

A dual-mobility shoulder prosthesis uses a rotating intermediate head to improve stability and reduce recurrent dislocation risk.

A rotational drive shaft and angled ramps coordinate vertical and lateral plate movement for precise vertebral spacing and alignment.

Bone cement joins a femoral stem to a porous hip cone, supporting biologic fixation while limiting bone removal in revision THA.

High compression can damage bone graft syringes; an autoclavable shell supports the multi-barreled design for controlled surgical delivery.

A collapsed anterior spacer expands in situ to adjust height and lordosis, reducing tissue disruption while supporting vertebral fusion.

Replacing metal with ceramic reduces ion production and wear, while anti-rotation features improve adhesion and limit detachment risk.

A modular anchor, tray, and liner create an inverse bone contour for stable humeral and glenoid implant fit and easier installation.

An insert-and-fastener connection limits bearing-to-baseplate micro-motion, improving durability without metal reinforcement.

A brake shoe locks the implant body during expansion, enabling precise disc-space placement and improved vertebral endplate contact.