Wrist Joints TRIZ Cases

A stop surface on the connecting portion limits depth depression of the proximal anchor during insertion.

A prosthetic ankle tibial portion features a curved concave articular surface with a flat section extending to the rear.

Custom cutting guides enable precise metatarsal realignment in bunion correction, resolving rotational deformity without increasing surgical complexity.

A talar implant system with an articulation component rigidly coupled at selectable angular positions to match patient anatomy.

Disposable surgical instrument encloses a bone fusion implant within a protective sleeve, eliminating sterilization cycles and reducing operational costs.

Orthogonal fibers in the scaffold convert axial compression to tension, resolving inconsistent tissue remodeling and improving mechanical reliability.

A cutting guide mediates cuneiform and metatarsal orientation to resolve unpredictable compression and alignment in tarsometatarsal joint fusion.

A fitting tool integrates alignment elements to orient a patient-specific device against anatomical landmarks.

A prosthesis coupling mechanism uses male and female engagement elements with detents to secure alignment during assembly.

Segmented instrumentation and intermediary joint finders correct flatfoot reconstruction reliability without increasing procedure complexity.

Transverse fixation distributes distracting forces across carpal bones, preventing screw loosening and bone breakage during wrist reconstruction.

A surgical handle with a multi-dimensional offset design aligns shaping instruments through small incisions.

Radial implant lips prevent capitate dislocation while a single stem secures the capitate bone, reducing loosening risks.

Segmented stem components assemble via snap fit to reduce subsidence and aseptic loosening in ankle replacement.

A clamp with a deflectable member links bone fasteners in veterinary prostheses.

An electromagnetic tracking robotic system guides precise bone machining to resolve manual cutting imprecision in ankle arthroplasty.

A bowed semi-flexible ulnar stem with a titanium core and Nitinol outer layer articulates with a radial component to replicate natural wrist kinematics.

Mobile ulna head implants translate transversely on a rod, distributing transverse loads to the bone and preventing decalcification.

A magnetic locking mechanism couples modular joint prostheses through attraction forces.

Asymmetric dowel grafts prevent rotation and enhance fixation strength, resolving unreliable medial column deformity correction.

A surgical targeting device with a dome-shaped convex outer surface guides a K-wire into bone.

A distal radioulnar joint prosthesis system restores normal biomechanics through precise surface replacement.

A unitary intercarpal implant replaces the scaphoid, lunate, and triquetrum bones with a single homogeneous structure.

Offset arc radii in a talar implant restore joint tension and kinematics, solving post-traumatic osteoarthritis malalignment without compromising bone stock.

Modular targeting apparatus aligns scaphoid and lunate bones using guidewires for precise implant placement.

Segmented radial and ulnar brace members support a spherical ball joint to maintain natural alignment while reducing wear on nerves and tendons.

A bone connector with a pivotable joint enables relative pivotal motion between anchor elements to accommodate anatomical axes.

An adjustable linkage locks radial and ulna components in selected orientations, resolving stability versus anatomical adaptability contradictions.

Segmented titanium and PEEK components resolve the strength-flexibility contradiction, allowing physiological rotation without osseous adherence.

Threaded and barbed intramedullary implant secures bone fusion without percutaneous wires, eliminating infection risks from skin penetration.

An expandable subtalar implant adjusts joint distraction via radial and angular expansion of its proximal end.

A modular distal radioulnar joint implant uses an adjustable bearing surface to restore natural wrist range of motion.

Custom radiographically designed cutting guide system eliminates complex external frames and reduces fluoroscopic use during total ankle replacement surgery.

A tapered implant aligns with the subtalar joint cavity to provide stable bone fixation through internal anchoring.

Dynamic cable system repairs scapholunate disruptions by maintaining stability without restricting natural motion.

Segmented distal radioulnar joint prostheses with adjustable alignment features accommodate varying patient anatomy while maintaining structural integrity.

Curved articular surfaces replicate native metatarsal head contours to restore physiological joint mobility while minimizing sesamoid interference.

Segmented dorsal members and curable adhesives stabilize metatarsal joints, correcting motion while preventing subsidence.

Conformal talar and navicular components restore physiological motion while minimizing bone removal.

Complementary convex-concave surfaces between proximal and distal bodies eliminate anchoring means, reducing bone wear and loosening while enhancing mobility.

A unitary implant merges intramedullary and extramedullary portions to secure bone fragments via oblique fastener apertures.

A prosthetic implant replaces the distal ulnar head while preserving soft tissue structures for stable joint function.

Preoperative 3D modeling creates custom cutting guides that eliminate external frames and reduce fluoroscopy usage during total ankle replacement surgery.

A lockable knee implant hinge transitions between stable stance and flexion using mechanical or magnetic locks.

A bone fusion device uses a targeting instrument system to ensure precise alignment and orientation of the implant within the wrist joint.

An inverted joint prosthesis places a projecting engagement member on the articular head element within a cavity on the bone engaging element.

A cylindrical subtalar implant with polygonal retaining elements provides stable anchoring.

Elongated slot with retractable projection prevents transverse translation while allowing longitudinal sliding to resolve the windshield wiper effect.

An ankle prosthesis intermediate implant adjusts relative to the tibial component and locks in place.

A cylindrical fusion barrel with a porous interior and cap stabilizes bone segments to promote osteointegration.