Joint Implants TRIZ Cases

Angled cutter miller reduces incision size by nesting the drive shaft within the frame plane.

Integrated stem and stabilizer box replace augments to maintain proper loading distribution during revision surgery.

A surgical guide tool uses a height adjustment device to extend a guide channel for precise implant placement.

An inflatable joint prosthesis uses a separate augment component to deliver medicaments while maintaining structural integrity.

Segmented prosthetic discs restore biomechanical stability via minimally invasive posterior surgery, preventing adjacent segment degeneration.

Segmented screw fixation and local quality variation resolve firm anchorage challenges in reduced pelvic bone areas.

Curved tip and perforated cavity enhance bone fusion stability, resolving anterior fusion failures and durability trade-offs.

An expandable spinal implant uses adjustable upper and lower main supports to accommodate varying vertebral spacings during surgery.

Segmented plates and shells eliminate cement reliance, providing structural strength while accommodating severe bone loss.

Segmented impaction surfaces conform to varying tibial bearing contours, resolving adaptability complexity trade-offs.

Segmented implant components and guide tools enable minimally invasive lateral insertion, avoiding neural tissue injury from distraction instrumentation.

Segmented femoral and tibial components assemble post-insertion via locking mechanisms, reducing tissue damage from large incisions.

Rearwardly offsetting the center of radius of curvature prevents posterior subsidence and tilting of end plates.

Terraced porous titanium sleeve minimizes cortical bone loss while transferring stresses to enhance rotational stability in revision knee surgery.

A spindle-type surgical tool holder uses a static handle and threaded insert to secure the implant.

Expandable attachment features secure bone anchoring components to eliminate trial instruments and reduce surgical procedure time.

Segmenting the acetabular cup into an anchor shell and size-selectable insert resolves the contradiction between fitment precision and device complexity.

A modular patellar implant combines polyethylene and porous metal to provide stable attachment without external fasteners.

Wedge members translate along plates to vertically separate an expandable intervertebral implant.

Offset projections prevent vertebral bone cracking during cervical disc implant stacking.

A femoral notch preparation guide uses anterior and posterior slots to direct saws and chisels during knee replacement surgery.

A spinal cage uses a threaded actuator to drive a wedge element between attachment members.

Motor units with drive stages deliver net power at knee and ankle joints, restoring biomechanically normal locomotion without sound leg instrumentation.

Independent proximal and distal wedges expand endplates to restore cervical lordosis, solving large footprint constraints in anterior discectomy procedures.

A posterior offset of the epiphyseal axis relative to the stem axis increases internal rotation range while preventing impingement with cortical tissue.

Angled transpedicular channels bypass nerve pathways to reduce injury risk during spinal fusion procedures.

A knee implant system uses a polyethylene insert between metal components to distribute mechanical loads across the bearing surface.

Segmented multi-radius dome surfaces accommodate surgical misalignment and enhance mobility without requiring precise placement.

Segmenting the handle from the sterilizable gripping head resolves reliability and complexity trade-offs in hip prosthesis packaging.

A temporo-mandibular prosthesis employs a polymeric glenoid insert within a metallic support to prevent metallic particle release during articulation.

A joint prosthesis design uses zone-specific radii of curvature to control radial clearance between the head and cup.

A variable height intervertebral device uses a rotating cylindrical body and threaded disks to adjust spinal spacing during implantation.

A patellofemoral trial extractor uses moveable arms and a biasing element to secure implants via elastic force.

An expandable interbody spacer uses dual actuators to adjust height and angulation for customized spinal fit.

Offset couplers align stems with bowed intramedullary canals, resolving anatomical variation constraints.

Internal gear mechanisms adjust axial distance and angular orientation in a joint implant, restoring natural kinematics and balancing soft tissue tension.

Circumferential toothing prevents inner shell rotation while minimizing pressing-in force to protect softer materials.

Instrument assembly couples a tibial base trial to an intramedullary guide via a pivoting fastener.

A glenoid adapter couples a convex articular component to an existing anchor using misaligned truncated-cone axes.

Test specimens with measurement scales determine adapter compatibility to prevent femur separation during revision surgery.

A rotatable collar couples to a prosthetic neck hole, enabling adjustable positioning of attachment points for bone fragments and soft tissues.

Posterior and anterior pins constrain anteroposterior movement while lateral lugs provide snap-coupling, eliminating clearance-induced wear.

A spinal fusion instrument uses a cam mechanism to lift top arms and separate fingers, protecting soft tissues during precise vertebral distraction.

A slider engages a guide feature on an acetabular cup to lock an augment in place, reducing implantation time while ensuring reliable bone fixation.

Segmented tubular reinforcement with integrated stiffening members prevents longitudinal compression and rotation, reducing tissue tearing and air leakage.

Constant velocity motion reduces resistive forces during acetabular cup insertion, preventing mal-positioning and bone fracture risks.