Joint Implants TRIZ Cases

Visual guides and anti-rotation features help surgeons assess acetabular cup orientation more accurately and reproducibly during hip trialling.

Curved box-post surfaces keep a single rotation axis in a constrained knee prosthesis, improving stability while preserving natural motion.

A monolithic intervertebral cage uses multi-cycling flexures to expand in situ for a wider fusion footprint through minimally invasive access.

Pivotable vertebral endplates enable in-situ angle matching to patient anatomy, reducing subsidence and sagittal imbalance after implantation.

Anatomy-matched cutting and trial guides enable precise tibial and femoral cuts for secure quadruped stifle implant placement.

A box-and-post knee implant adds high constraint while preserving natural articulation through a coincident axis of rotation across motion.

An intramedullary nail and sliding alignment jig enable accurate hip implant placement while preserving femoral bone for revision.

Actuated lead screws, wedges, and threaded barrels let spinal fusion implants expand in situ for precise height and lordosis adjustment.

A rubber knee replacement uses scan-based customization and hemp-fiber reinforcement to improve flexibility, reduce friction, and limit metal wear issues.

An adjustable trial head uses a movable spacer and shaft to determine femoral offset in situ, reducing repeated hip relocation and tissue disruption.

By modeling scapula, humerus, and thorax motion together, this case improves shoulder implant positioning and range-of-motion planning.

A geared angled awl converts push-button actuation into angled bone piercing, improving access and pilot hole accuracy for spinal fixation.

A biocompatible case around the prosthetic stem keeps cement uniform and prevents direct metal-bone contact that can cause resorption.

Real-time navigation tracks leg length and offset during THA by adjusting an expandable trial femoral assembly.

Friction fit and porous surfaces stabilize spinal implants without threads, reducing tissue damage, malposition, and revision risk.

A unitary additively manufactured femoral implant uses an integral porous body and solid articulation surface to improve fixation and avoid delamination.

Angled proximal, distal, and intermediate arms anchor an annulus implant to seal disc defects, resist nucleus pulposus ejection, and preserve motion.

Frictional washer elements and interlocking cams keep orthopedic implant screws engaged under subsidence and compression, reducing loosening.

A pivoting, rotatable handle lets one spinal implant instrument switch between straight and angled insertion while maintaining precise placement.

A guide member fixed to the interbody cage keeps the spinal plate centered for accurate drilling, fixation, and fusion placement.

A central tibial tray aperture and clip secure ligament tissue while preserving implant stability and supporting ACL repair or reconstruction.

Crescent anterior geometry, posterior facet pairs, and offset pegs improve unicompartmental femoral implant stability, fit, and bone integration.

An offset peg and neutral bearing let a glenoid implant switch articulation types without shifting rotation, reducing overstuffing and instability.

An offset hook and dual striking surfaces transmit hammer force to break the implant-bone bond, enabling less invasive femoral implant removal.

A unitary core expands segmented endplates after insertion, combining easier spinal placement with larger vertebral contact area.

Custom molds form tibial and femoral augments and cones to stabilize temporary spacers during surgery for segmental and cavitary bone defects.

Lead screws, wedges, and passive locking let surgeons adjust implant height and angulation in situ to restore spinal lordosis precisely.

Reshapable titanium brackets bonded to a stiff socket improve pelvic bone anchoring and intraoperative fit without losing load stability.

Modular latching mold parts improve PMMA hip spacer casting fit while reducing contamination risk and avoiding complex two-stage surgery.

A screw-driven linkage expands the implant inside the disc space, reducing nerve retraction and shortening spinal fusion procedures.

Integrated 3D porosity in a solid spinal implant supports bone ingrowth while preserving strength for faster, stronger intervertebral fusion.

Inserted in a compressed state, this intervertebral spacer expands in situ to improve vertebral fit and reduce impaction during implantation.

Interconnected strut surfaces give bone-anchoring implants immediate fixation and pathways for bone ingrowth through locally varied porosity and features.

Rotatable coupling and augment elements improve glenoid implant fixation in severe bone loss while lowering nerve injury and loosening risk.

A motor-driven slider, shuttle, and sensors replace manual or pneumatic impaction to cut bone with less joint stress and freer tool orientation.

Multiple radii and a handed condyle-matched surface help a femoral implant improve knee stability, motion, and bone preservation.

Dual screw-and-ramp actuation enables independent ipsilateral and contralateral implant expansion for precise coronal correction and disc height restoration.

Elastic holding and middle pieces fit curved ribs, stabilizing fractures while allowing controlled movement to reduce pain and loosening.

Localized porous and solid regions in a spinal interbody implant improve bone ingrowth while preserving load-bearing strength and stability.

A reverse stemless shoulder prosthesis improves motion and stability by shifting articulation and using porous metal fixation with less bone trauma.

Controlled resistive heating loosens implant fixation, disrupts biofilms, and speeds bone cement curing during orthopedic surgery.

An asymmetric groove lets the O-ring grip a femoral stem taper securely during fit checks, then release without excessive force or taper damage.

A monolithic 3D-printed cervical implant integrates a rotatable lock to improve screw trajectory, fixation stability, and backout resistance.

A pivoting arm and screw-driven force applicator boost clamping force and torque for extracting varied implant shapes in revision surgery.

Arcuate lateral and medial removal tools follow the bone-implant interface to extract femoral implants while minimizing bone loss.

A blocking member inside the spacer locks inserted fasteners against withdrawal, improving spinal implant stability and fusion support.

A stepped inlay-onlay implant anchors into the excision site to improve joint stability, expand surface coverage, and limit bone removal.

Protected attachment segments and composite fiber networks help a meniscus scaffold anchor securely to bone without damaging load-bearing fibers.

A reversible driver key and coaxial shafts let one surgical tool expand, collapse, and adjust intervertebral implants with less complexity.

A single-incision scapular spine implant spans Levy fracture zones and anchors in stable bone to prevent or treat fractures after reverse shoulder arthroplasty.