Joint Implants TRIZ Cases

Nested cage control assembly translates screw rotation into transverse expansion of interbody shells for precise anatomical fitting.

Detachable humeral head components allow surgeons to access the glenoid without removing the stem, preserving bone stock.

Elongated femoral slots allow a hinge pin to translate, shifting the axis of rotation to evenly distribute weight loads and stabilize damaged ligaments.

Draw wire pulls trapezoidal segments into an arcuate shape, restoring disc height through minimally invasive access.

Integrally formed hydrogel anchoring elements secure implantable tissue repair devices to bone or cartilage.

Integral arm fixtures on arthroplasty jig blanks eliminate complex external positioning, reducing manufacturing time and cost.

Solid-state diffusion bonding attaches porous metallic ingrowth structures to biocompatible alloy implant bodies.

Hydraulic pump activation reduces power consumption while maintaining motion control reliability for amputees.

An expandable spinal implant uses a control shaft to rotate an adjustable member between collapsed and expanded positions.

A central ramp drives endplates outward to expand the fusion device within the disc space.

Segmented upper and lower sections expand via sliding grooves to maintain lordosis while reducing surgical time.

An adjustable intervertebral disc replacement device positions articular surfaces along an anteroposterior axis to mimic natural spinal mechanics.

A hollow oval interbody fusion device with selective fixation holes enables versatile surgical access across multiple anatomical corridors.

A knee prosthesis intermediate structure transitions from concave to convex surface curvature at deep flexion angles.

Virtual assessment using two-dimensional outlines determines prosthesis fit accuracy, reducing surgical time by eliminating invasive trial fittings.

Segmented tapered inner walls and asymmetric recesses establish a secure interference fit, resolving liner instability in acetabular cup assemblies.

Polygonal shim facets index angular position of proximal element relative to humeral shaft, resolving anatomical alignment issues.

Temperature-sensitive anchors expand to resist expulsion while roughened surfaces grip bone without damaging structures.

A spring-loaded clamping device secures interbody implants using anti-slipping elements and a stepped seat mechanism.

Modular elliptical humeral head prostheses match native anatomy to improve shoulder range of motion.

Mechanically fixed porous metal pegs allow straightforward removal during revision surgery, conserving native bone and reducing surgical complexity.

Heating PEEK to its softening point enables hot pressing, reducing material waste and cost while maintaining precision.

A femoral component with a saddle-shaped anterior cam surface distributes contact stress across the tibial post interface.

Offset coupler creates moment arm resisting rotation in compromised bone conditions.

A spinal implant uses a rack and pinion mechanism to convert rotational actuation into linear expansion for precise height adjustment.

Identifying the inferior glenoid circle center positions the glenoid component to balance loading and prevent rocking horse failure in shoulder arthroplasty.

A porous expandable interbody spacer matches vertebral bone stiffness to reduce subsidence and stress shielding while promoting bone ingrowth.

A glenosphere positioning device uses a sliding guide pin to align the implant.

Plastic deformation of the rail secures anchors to bone, eliminating osteolysis risks from traditional fixation methods.

Microprocessor-controlled variable resistors adjust hydraulic damping to stabilize gait on sloped surfaces without excessive energy loss.

Segmented arm assemblies in an expandable intervertebral cage allow precise angular orientation of base plates, resolving stability issues after distraction.

A metal interbody cage uses a PEEK insert secured by planar pins to stabilize the implant between vertebrae.

Segmented axle pin with spreading stubs prevents jamming during implantation of bending hinges in joint prostheses.

Segmented resurfacing implant with offset stem avoids tensile regions, ensuring secure anchorage while preserving original bone integrity.

A corpectomy implant uses helical and undulating structural elements to direct bone growth across targeted spinal regions.

Movable mounting frame positions cutting block to resolve positioning precision versus instrument complexity trade-off.

An asymmetrical femoral cam engages a tibial post to replicate natural knee rotation during flexion.

Asymmetric femoral stem with arc-shaped medial side and longitudinal reliefs prevents rotation and sinking while preserving bone tissue.

Segmenting the intervertebral fusion device allows oblique core insertion, reducing blood vessel damage risk while enabling larger footprint stability.

Graded surface roughness on the artificial joint stem alleviates stress concentration at edge portions while securing bone fixation.

A bone fusion device uses a measuring mechanism to facilitate secure placement between vertebrae.

A curved acetabular instrument uses a flexible drive shaft to transmit torque through a hollow body.

Converging bore axes direct screws toward stable scapular regions, resolving fixation instability in compromised bone.

A unitary monolithic intervertebral cage expands via flexure members to increase its mediolateral footprint after insertion.

An intervertebral disk prosthesis uses an elastically deformable O-ring to provide damped movement between independent portions.

Rotating form-fitting means secure joint implant parts, preventing detachment during complex movements.

Polymeric locking medium enables infinite angular adjustment of the joint head after cementation, resolving access constraints.

Straight pedicular cannulas and flexible drill bits enable controlled intersomatic space creation through minimally invasive percutaneous routes.

A joint implant integrates a rotatable cutter and detachable shaft to simplify surgical procedures.